environment

What What
1. What causes air pollution? 1. What causes air pollution?
Vehicle smoke causes air pollution. Vehicle smoke causes air pollution.
2. What can we recycle? 2. What can we recycle?
We can recycle paper, plastic, and glass. We can recycle paper, plastic, and glass.
3. What should we plant in our neighborhood? 3. What should we plant in our neighborhood?
We should plant more trees. We should plant more trees.
Where Where
1. Where should we throw plastic waste? 1. Where should we throw plastic waste?
We should throw it in the recycling bin. We should throw it in the recycling bin.
2. Where do birds build their nests? 2. Where do birds build their nests?
They build their nests in trees. They build their nests in trees.
3. Where can we plant more trees? 3. Where can we plant more trees?
We can plant them in parks and schools. We can plant them in parks and schools.
When When
1. When should we water the plants? 1. When should we water the plants?
We should water them in the morning. We should water them in the morning.
2. When does the rainy season begin? 2. When does the rainy season begin?
It begins in June. It begins in June.
3. When do trees lose their leaves? 3. When do trees lose their leaves?
Many trees lose their leaves in autumn. Many trees lose their leaves in autumn.
Why Why
1. Why should we save water? 1. Why should we save water?
Because clean water is valuable. Because clean water is valuable.
2. Why are forests important? 2. Why are forests important?
They provide clean air and wildlife habitats. They provide clean air and wildlife habitats.
3. Why do people plant trees? 3. Why do people plant trees?
They plant trees to protect the environment. They plant trees to protect the environment.
Who Who
1. Who cleans the public park? 1. Who cleans the public park?
The municipal workers clean it. The municipal workers clean it.
2. Who protects wild animals? 2. Who protects wild animals?
Forest officers protect them. Forest officers protect them.
3. Who teaches children about recycling? 3. Who teaches children about recycling?
Teachers teach them about recycling. Teachers teach them about recycling.
Which Which
1. Which tree gives more shade? 1. Which tree gives more shade?
The banyan tree gives more shade. The banyan tree gives more shade.
2. Which bin is for plastic waste? 2. Which bin is for plastic waste?
The blue bin is for plastic waste. The blue bin is for plastic waste.
3. Which season is best for planting trees? 3. Which season is best for planting trees?
The rainy season is the best. The rainy season is the best.
How How
1. How can we protect the environment? 1. How can we protect the environment?
We can protect it by planting trees. We can protect it by planting trees.
2. How do you save water at home? 2. How do you save water at home?
I turn off the tap after use. I turn off the tap after use.
3. How was the weather yesterday? 3. How was the weather yesterday?
It was cool and pleasant. It was cool and pleasant.
Do Do
1. Do you plant trees every year? 1. Do you plant trees every year?
Yes, I do. Yes, I do.
2. Do birds need clean water? 2. Do birds need clean water?
Yes, they do. Yes, they do.
3. Do people recycle plastic bottles? 3. Do people recycle plastic bottles?
Yes, many people do. Yes, many people do.
Does Does
1. Does this river provide drinking water? 1. Does this river provide drinking water?
Yes, it does. Yes, it does.
2. Does your school have a garden? 2. Does your school have a garden?
Yes, it does. Yes, it does.
3. Does smoke pollute the air? 3. Does smoke pollute the air?
Yes, it does. Yes, it does.
Did Did
1. Did you water the plants this morning? 1. Did you water the plants this morning?
Yes, I did. Yes, I did.
2. Did the rain fill the lake? 2. Did the rain fill the lake?
Yes, it did. Yes, it did.
3. Did they clean the park yesterday? 3. Did they clean the park yesterday?
Yes, they did. Yes, they did.
Is Is
1. Is the air clean today? 1. Is the air clean today?
Yes, it is. Yes, it is.
2. Is this water safe to drink? 2. Is this water safe to drink?
Yes, it is. Yes, it is.
3. Is recycling good for the environment? 3. Is recycling good for the environment?
Yes, it is. Yes, it is.
Are Are
1. Are the trees growing well? 1. Are the trees growing well?
Yes, they are. Yes, they are.
2. Are rivers important for wildlife? 2. Are rivers important for wildlife?
Yes, they are. Yes, they are.
3. Are we wasting too much water? 3. Are we wasting too much water?
No, we aren’t. No, we aren’t.
Was Was
1. Was the weather sunny yesterday? 1. Was the weather sunny yesterday?
Yes, it was. Yes, it was.
2. Was the lake clean last year? 2. Was the lake clean last year?
Yes, it was. Yes, it was.
3. Was the park crowded on Sunday? 3. Was the park crowded on Sunday?
No, it wasn’t. No, it wasn’t.
Am Am
1. Am I wasting water? 1. Am I wasting water?
No, you aren’t. No, you aren’t.
2. Am I helping the environment? 2. Am I helping the environment?
Yes, you are. Yes, you are.
3. Am I planting enough trees? 3. Am I planting enough trees?
Yes, you are. Yes, you are.
Were Were
1. Were the streets clean yesterday? 1. Were the streets clean yesterday?
Yes, they were. Yes, they were.
2. Were the birds in the garden this morning? 2. Were the birds in the garden this morning?
Yes, they were. Yes, they were.
3. Were you at the tree plantation program? 3. Were you at the tree plantation program?
Yes, I was. Yes, I was.
Will Will
1. Will you plant a tree this week? 1. Will you plant a tree this week?
Yes, I will. Yes, I will.
2. Will the weather improve tomorrow? 2. Will the weather improve tomorrow?
Yes, it will. Yes, it will.
3. Will people stop using plastic bags? 3. Will people stop using plastic bags?
I hope they will. I hope they will.
Would Would
1. Would you join a tree plantation drive? 1. Would you join a tree plantation drive?
Yes, I would. Yes, I would.
2. Would your friends help clean the park? 2. Would your friends help clean the park?
Yes, they would. Yes, they would.
3. Would you use a cloth bag instead of a plastic bag? 3. Would you use a cloth bag instead of a plastic bag?
Yes, I would. Yes, I would.
Shall Shall
1. Shall we plant more trees? 1. Shall we plant more trees?
Yes, let’s plant them. Yes, let’s plant them.
2. Shall I water the plants now? 2. Shall I water the plants now?
Yes, please do. Yes, please do.
3. Shall we clean the beach this weekend? 3. Shall we clean the beach this weekend?
Yes, that’s a good idea. Yes, that’s a good idea.
Should Should
1. Should we save electricity? 1. Should we save electricity?
Yes, we should. Yes, we should.
2. Should people recycle more waste? 2. Should people recycle more waste?
Yes, they should. Yes, they should.
3. Should children learn about nature? 3. Should children learn about nature?
Yes, they should. Yes, they should.
Can Can
1. Can trees reduce air pollution? 1. Can trees reduce air pollution?
Yes, they can. Yes, they can.
2. Can we save rainwater? 2. Can we save rainwater?
Yes, we can. Yes, we can.
3. Can birds live without trees? 3. Can birds live without trees?
No, they can’t. No, they can’t.
Could Could
1. Could you switch off the lights? 1. Could you switch off the lights?
Yes, I could. Yes, I could.
2. Could we reduce plastic waste? 2. Could we reduce plastic waste?
Yes, we could. Yes, we could.
3. Could they clean the river together? 3. Could they clean the river together?
Yes, they could. Yes, they could.
May May
1. May I water these plants? 1. May I water these plants?
Yes, you may. Yes, you may.
2. May we join the clean-up campaign? 2. May we join the clean-up campaign?
Yes, you may. Yes, you may.
3. May I plant a tree here? 3. May I plant a tree here?
Yes, you may. Yes, you may.
Might Might
1. Might it rain this evening? 1. Might it rain this evening?
Yes, it might. Yes, it might.
2. Might the river overflow after heavy rain? 2. Might the river overflow after heavy rain?
Yes, it might. Yes, it might.
3. Might we face water shortages in summer? 3. Might we face water shortages in summer?
Yes, we might. Yes, we might.
Or Or
1. Will you plant a tree or a flower? 1. Will you plant a tree or a flower?
I will plant a tree. I will plant a tree.
2. Is this water clean or polluted? 2. Is this water clean or polluted?
It is clean. It is clean.
3. Should we walk or ride a bicycle? 3. Should we walk or ride a bicycle?
We should ride a bicycle. We should ride a bicycle.
Have Have
1. Have you planted any trees this year? 1. Have you planted any trees this year?
Yes, I have. Yes, I have.
2. Have they cleaned the river? 2. Have they cleaned the river?
Yes, they have. Yes, they have.
3. Have we reduced plastic waste? 3. Have we reduced plastic waste?
Yes, we have. Yes, we have.
Has Has
1. Has the rain filled the lake? 1. Has the rain filled the lake?
Yes, it has. Yes, it has.
2. Has your school started a recycling program? 2. Has your school started a recycling program?
Yes, it has. Yes, it has.
3. Has the government planted more trees? 3. Has the government planted more trees?
Yes, it has. Yes, it has.
Had Had
1. Had you watered the plants before the rain? 1. Had you watered the plants before the rain?
Yes, I had. Yes, I had.
2. Had the workers cleaned the park before the event? 2. Had the workers cleaned the park before the event?
Yes, they had. Yes, they had.
3. Had the river dried up before the monsoon? 3. Had the river dried up before the monsoon?
No, it hadn’t. No, it hadn’t.
How long How long
1. How long does a tree take to grow? 1. How long does a tree take to grow?
It takes several years. It takes several years.
2. How long have you been saving water? 2. How long have you been saving water?
I have been saving water for five years. I have been saving water for five years.
3. How long will the clean-up campaign last? 3. How long will the clean-up campaign last?
It will last for three days. It will last for three days.
How many How many
1. How many trees did you plant? 1. How many trees did you plant?
I planted ten trees. I planted ten trees.
2. How many parks are there in your town? 2. How many parks are there in your town?
There are six parks. There are six parks.
3. How many people joined the clean-up drive? 3. How many people joined the clean-up drive?
More than one hundred people joined. More than one hundred people joined.
How often How often
1. How often do you water the plants? 1. How often do you water the plants?
I water them every day. I water them every day.
2. How often do you recycle waste? 2. How often do you recycle waste?
I recycle waste every week. I recycle waste every week.
3. How often does it rain here? 3. How often does it rain here?
It rains frequently during the monsoon. It rains frequently during the monsoon.
How early How early
1. How early should we water the garden? 1. How early should we water the garden?
We should water it early in the morning. We should water it early in the morning.
2. How early do birds start singing? 2. How early do birds start singing?
They start singing before sunrise. They start singing before sunrise.
3. How early did you join the tree plantation program? 3. How early did you join the tree plantation program?
I joined thirty minutes early. I joined thirty minutes early.
How long How long
1. How long does plastic take to decompose? 1. How long does plastic take to decompose?
It takes hundreds of years. It takes hundreds of years.
2. How long have you been planting trees? 2. How long have you been planting trees?
I have been planting trees for three years. I have been planting trees for three years.
3. How long will the environmental campaign continue? 3. How long will the environmental campaign continue?
It will continue for one week. It will continue for one week.
How far How far
1. How far is the nearest forest? 1. How far is the nearest forest?
It is twenty kilometers away. It is twenty kilometers away.
2. How far does river pollution spread? 2. How far does river pollution spread?
It spreads for many kilometers. It spreads for many kilometers.
3. How far can birds fly without stopping? 3. How far can birds fly without stopping?
Some birds can fly thousands of kilometers. Some birds can fly thousands of kilometers.
How old How old
1. How old is this banyan tree? 1. How old is this banyan tree?
It is over one hundred years old. It is over one hundred years old.
2. How old is the national park? 2. How old is the national park?
It is fifty years old. It is fifty years old.
3. How old is this forest? 3. How old is this forest?
It is several hundred years old. It is several hundred years old.
Right? Right?
1. Planting trees improves air quality, right? 1. Planting trees improves air quality, right?
Yes, that’s right. Yes, that’s right.
2. We should avoid plastic bags, right? 2. We should avoid plastic bags, right?
Yes, we should. Yes, we should.
3. Clean rivers are important, right? 3. Clean rivers are important, right?
Yes, they are. Yes, they are.
Isn’t it? Isn’t it?
1. Recycling is useful, isn’t it? 1. Recycling is useful, isn’t it?
Yes, it is. Yes, it is.
2. Clean air is essential, isn’t it? 2. Clean air is essential, isn’t it?
Yes, it is. Yes, it is.
3. Saving water is important, isn’t it? 3. Saving water is important, isn’t it?
Yes, it is. Yes, it is.
Aren’t you? Aren’t you?
1. You’re planting a tree today, aren’t you? 1. You’re planting a tree today, aren’t you?
Yes, I am. Yes, I am.
2. You’re using a reusable bottle, aren’t you? 2. You’re using a reusable bottle, aren’t you?
Yes, I am. Yes, I am.
3. You’re saving electricity at home, aren’t you? 3. You’re saving electricity at home, aren’t you?
Yes, I am. Yes, I am.
Didn’t you? Didn’t you?
1. You planted a tree last month, didn’t you? 1. You planted a tree last month, didn’t you?
Yes, I did. Yes, I did.
2. You cleaned the park yesterday, didn’t you? 2. You cleaned the park yesterday, didn’t you?
Yes, I did. Yes, I did.
3. You switched off the lights before leaving, didn’t you? 3. You switched off the lights before leaving, didn’t you?
Yes, I did. Yes, I did.
Whose Whose
1. Whose responsibility is it to keep the park clean? 1. Whose responsibility is it to keep the park clean?
It is everyone’s responsibility. It is everyone’s responsibility.
2. Whose idea was the tree plantation campaign? 2. Whose idea was the tree plantation campaign?
It was the students’ idea. It was the students’ idea.
3. Whose garden has the most flowers? 3. Whose garden has the most flowers?
My neighbor’s garden has the most flowers. My neighbor’s garden has the most flowers.
Whom Whom
1. Whom should we inform about illegal tree cutting? 1. Whom should we inform about illegal tree cutting?
We should inform the forest department. We should inform the forest department.
2. Whom did you invite to the clean-up campaign? 2. Whom did you invite to the clean-up campaign?
I invited my classmates. I invited my classmates.
3. Whom do you ask for gardening advice? 3. Whom do you ask for gardening advice?
I ask my grandfather. I ask my grandfather.
What kind of What kind of
1. What kind of trees grow in this area? 1. What kind of trees grow in this area?
Neem trees grow well here. Neem trees grow well here.
2. What kind of waste can we recycle? 2. What kind of waste can we recycle?
We can recycle paper, glass, and plastic. We can recycle paper, glass, and plastic.
3. What kind of energy is eco-friendly? 3. What kind of energy is eco-friendly?
Solar energy is eco-friendly. Solar energy is eco-friendly.
What type of What type of
1. What type of pollution is most common in cities? 1. What type of pollution is most common in cities?
Air pollution is the most common. Air pollution is the most common.
2. What type of plants grow in deserts? 2. What type of plants grow in deserts?
Cactus plants grow in deserts. Cactus plants grow in deserts.
3. What type of bag should we use? 3. What type of bag should we use?
We should use cloth bags. We should use cloth bags.
What time What time
1. What time should we water the plants? 1. What time should we water the plants?
We should water them at 6:00 a.m. We should water them at 6:00 a.m.
2. What time does the park open? 2. What time does the park open?
It opens at 5:00 a.m. It opens at 5:00 a.m.
3. What time will the environmental program begin? 3. What time will the environmental program begin?
It will begin at 10:00 a.m. It will begin at 10:00 a.m.
What day What day
1. What day is the tree plantation drive? 1. What day is the tree plantation drive?
It is on Sunday. It is on Sunday.
2. What day will the park clean-up take place? 2. What day will the park clean-up take place?
It will take place on Saturday. It will take place on Saturday.
3. What day do you usually water the garden? 3. What day do you usually water the garden?
I usually water it every Sunday. I usually water it every Sunday.
How much How much
1. How much water do you drink every day? 1. How much water do you drink every day?
I drink about three liters. I drink about three liters.
2. How much rain did your village receive? 2. How much rain did your village receive?
It received heavy rainfall. It received heavy rainfall.
3. How much electricity can we save by switching off unused lights? 3. How much electricity can we save by switching off unused lights?
We can save a lot of electricity. We can save a lot of electricity.
How soon How soon
1. How soon can we reduce air pollution? 1. How soon can we reduce air pollution?
We can reduce it with continuous effort. We can reduce it with continuous effort.
2. How soon will these plants grow? 2. How soon will these plants grow?
They will grow in a few weeks. They will grow in a few weeks.
3. How soon should we plant new trees after cutting old ones? 3. How soon should we plant new trees after cutting old ones?
We should plant them immediately. We should plant them immediately.
How late How late
1. How late can we water the plants? 1. How late can we water the plants?
We can water them before sunset. We can water them before sunset.
2. How late did the rain continue yesterday? 2. How late did the rain continue yesterday?
It continued until midnight. It continued until midnight.
3. How late should we stay in the park? 3. How late should we stay in the park?
We should leave before dark. We should leave before dark.
How fast How fast
1. How fast do trees grow? 1. How fast do trees grow?
Some trees grow very quickly. Some trees grow very quickly.
2. How fast does pollution spread? 2. How fast does pollution spread?
It spreads very fast. It spreads very fast.
3. How fast can a forest recover after a fire? 3. How fast can a forest recover after a fire?
It may take many years. It may take many years.
How big How big
1. How big is the national park? 1. How big is the national park?
It covers hundreds of square kilometers. It covers hundreds of square kilometers.
2. How big is the forest reserve? 2. How big is the forest reserve?
It is very large. It is very large.
3. How big is the recycling center? 3. How big is the recycling center?
It serves the entire city. It serves the entire city.
How small How small
1. How small is a mustard seed? 1. How small is a mustard seed?
It is very tiny. It is very tiny.
2. How small are young tree leaves? 2. How small are young tree leaves?
They are very small at first. They are very small at first.
3. How small can recycled paper pieces become? 3. How small can recycled paper pieces become?
They can become tiny fibers. They can become tiny fibers.
How tall How tall
1. How tall is the coconut tree? 1. How tall is the coconut tree?
It is about twenty meters tall. It is about twenty meters tall.
2. How tall can a bamboo plant grow? 2. How tall can a bamboo plant grow?
It can grow over thirty meters. It can grow over thirty meters.
3. How tall is the oldest tree in this park? 3. How tall is the oldest tree in this park?
It is about twenty-five meters tall. It is about twenty-five meters tall.
How deep How deep
1. How deep is this lake? 1. How deep is this lake?
It is about fifteen meters deep. It is about fifteen meters deep.
2. How deep should we plant this tree? 2. How deep should we plant this tree?
We should plant it about one meter deep. We should plant it about one meter deep.
3. How deep are the roots of this banyan tree? 3. How deep are the roots of this banyan tree?
They go several meters into the ground. They go several meters into the ground.
Must Must
1. Must we protect the environment? 1. Must we protect the environment?
Yes, we must. Yes, we must.
2. Must people avoid littering? 2. Must people avoid littering?
Yes, they must. Yes, they must.
3. Must I switch off the lights before leaving? 3. Must I switch off the lights before leaving?
Yes, you must. Yes, you must.
Ought to Ought to
1. Ought we to save water? 1. Ought we to save water?
Yes, we ought to. Yes, we ought to.
2. Ought people to plant more trees? 2. Ought people to plant more trees?
Yes, they ought to. Yes, they ought to.
3. Ought children to learn about nature? 3. Ought children to learn about nature?
Yes, they ought to. Yes, they ought to.
Need Need
1. Need we reduce plastic waste? 1. Need we reduce plastic waste?
Yes, we need to. Yes, we need to.
2. Need I water these plants every day? 2. Need I water these plants every day?
Yes, you need to. Yes, you need to.
3. Need they separate recyclable waste? 3. Need they separate recyclable waste?
Yes, they need to. Yes, they need to.
Dare Dare
1. Dare you cut down a healthy tree? 1. Dare you cut down a healthy tree?
No, I don’t dare. No, I don’t dare.
2. Dare they pollute the river? 2. Dare they pollute the river?
No, they don’t dare. No, they don’t dare.
3. Dare anyone harm wild animals? 3. Dare anyone harm wild animals?
No, nobody dares. No, nobody dares.
Either … or Either … or
1. Will you plant either a neem tree or a mango tree? 1. Will you plant either a neem tree or a mango tree?
I will plant a neem tree. I will plant a neem tree.
2. Should we use either cloth bags or paper bags? 2. Should we use either cloth bags or paper bags?
We should use cloth bags. We should use cloth bags.
3. Can we generate electricity from either wind or sunlight? 3. Can we generate electricity from either wind or sunlight?
Yes, we can. Yes, we can.
Whether … or Whether … or
1. Have you decided whether to plant flowers or trees? 1. Have you decided whether to plant flowers or trees?
Yes, I have decided to plant trees. Yes, I have decided to plant trees.
2. Do you know whether the river is clean or polluted? 2. Do you know whether the river is clean or polluted?
Yes, it is clean. Yes, it is clean.
3. Can you tell me whether this waste is recyclable or non-recyclable? 3. Can you tell me whether this waste is recyclable or non-recyclable?
Yes, it is recyclable. Yes, it is recyclable.
Wasn’t he? Wasn’t he?
1. He was watering the plants yesterday, wasn’t he? 1. He was watering the plants yesterday, wasn’t he?
Yes, he was. Yes, he was.
2. He was at the tree plantation program, wasn’t he? 2. He was at the tree plantation program, wasn’t he?
Yes, he was. Yes, he was.
3. He was cleaning the park this morning, wasn’t he? 3. He was cleaning the park this morning, wasn’t he?
No, he wasn’t. No, he wasn’t.
Weren’t they? Weren’t they?
1. They were planting trees together, weren’t they? 1. They were planting trees together, weren’t they?
Yes, they were. Yes, they were.
2. They were collecting plastic waste, weren’t they? 2. They were collecting plastic waste, weren’t they?
Yes, they were. Yes, they were.
3. They were protecting the forest, weren’t they? 3. They were protecting the forest, weren’t they?
No, they weren’t. No, they weren’t.
Don’t you? Don’t you?
1. You recycle paper, don’t you? 1. You recycle paper, don’t you?
Yes, I do. Yes, I do.
2. You care about nature, don’t you? 2. You care about nature, don’t you?
Yes, I do. Yes, I do.
3. You save electricity at home, don’t you? 3. You save electricity at home, don’t you?
Yes, I do. Yes, I do.
Doesn’t she? Doesn’t she?
1. She waters the garden every morning, doesn’t she? 1. She waters the garden every morning, doesn’t she?
Yes, she does. Yes, she does.
2. She uses reusable bags, doesn’t she? 2. She uses reusable bags, doesn’t she?
Yes, she does. Yes, she does.
3. She teaches children about recycling, doesn’t she? 3. She teaches children about recycling, doesn’t she?
Yes, she does. Yes, she does.
Haven’t you? Haven’t you?
1. You have planted a tree, haven’t you? 1. You have planted a tree, haven’t you?
Yes, I have. Yes, I have.
2. You have joined the clean-up campaign, haven’t you? 2. You have joined the clean-up campaign, haven’t you?
Yes, I have. Yes, I have.
3. You have learned about recycling, haven’t you? 3. You have learned about recycling, haven’t you?
Yes, I have. Yes, I have.
Hasn’t he? Hasn’t he?
1. He has planted many trees, hasn’t he? 1. He has planted many trees, hasn’t he?
Yes, he has. Yes, he has.
2. He has cleaned the lake, hasn’t he? 2. He has cleaned the lake, hasn’t he?
Yes, he has. Yes, he has.
3. He has reduced plastic use, hasn’t he? 3. He has reduced plastic use, hasn’t he?
Yes, he has. Yes, he has.
Won’t you? Won’t you?
1. You will plant a tree today, won’t you? 1. You will plant a tree today, won’t you?
Yes, I will. Yes, I will.
2. You will save water, won’t you? 2. You will save water, won’t you?
Yes, I will. Yes, I will.
3. You will keep the park clean, won’t you? 3. You will keep the park clean, won’t you?
Yes, I will. Yes, I will.
Wouldn’t you? Wouldn’t you?
1. You would protect the environment, wouldn’t you? 1. You would protect the environment, wouldn’t you?
Yes, I would. Yes, I would.
2. You would recycle plastic bottles, wouldn’t you? 2. You would recycle plastic bottles, wouldn’t you?
Yes, I would. Yes, I would.
3. You would encourage others to plant trees, wouldn’t you? 3. You would encourage others to plant trees, wouldn’t you?
Yes, I would. Yes, I would.
Shouldn’t we? Shouldn’t we?
1. Shouldn’t we plant more trees? 1. Shouldn’t we plant more trees?
Yes, we should. Yes, we should.
2. Shouldn’t we save water every day? 2. Shouldn’t we save water every day?
Yes, we should. Yes, we should.
3. Shouldn’t we keep our surroundings clean? 3. Shouldn’t we keep our surroundings clean?
Yes, we should. Yes, we should.
Couldn’t they? Couldn’t they?
1. Couldn’t they recycle the plastic bottles? 1. Couldn’t they recycle the plastic bottles?
Yes, they could. Yes, they could.
2. Couldn’t they protect the forest? 2. Couldn’t they protect the forest?
Yes, they could. Yes, they could.
3. Couldn’t they clean the polluted river? 3. Couldn’t they clean the polluted river?
No, they couldn’t. No, they couldn’t.
However However
1. However can we reduce plastic pollution? 1. However can we reduce plastic pollution?
We can reduce it by using reusable bags. We can reduce it by using reusable bags.
2. However did the lake become so clean? 2. However did the lake become so clean?
People cleaned it together. People cleaned it together.
3. However will we protect endangered animals? 3. However will we protect endangered animals?
We will protect them by preserving their habitats. We will protect them by preserving their habitats.
Whatever Whatever
1. Whatever can we do to save the environment? 1. Whatever can we do to save the environment?
We can plant more trees. We can plant more trees.
2. Whatever happened to the old forest? 2. Whatever happened to the old forest?
It was protected by the government. It was protected by the government.
3. Whatever should we recycle first? 3. Whatever should we recycle first?
We should recycle plastic bottles first. We should recycle plastic bottles first.
Whenever Whenever
1. Whenever do you water your plants? 1. Whenever do you water your plants?
I water them every morning. I water them every morning.
2. Whenever can we plant new trees? 2. Whenever can we plant new trees?
We can plant them during the rainy season. We can plant them during the rainy season.
3. Whenever should we switch off unused lights? 3. Whenever should we switch off unused lights?
We should switch them off whenever we leave a room. We should switch them off whenever we leave a room.