by us

If we plant more trees, the air will be cleaner

Sử dụng conditional sentences type 1 vì nó có thể là hiện thực

If she didnt work in a noisy place , she wouldnt has a headache .

If tomorrow was fine, we would go for a picnic

Unless he listens to people, he will never have many friends

1. If a person don't look at the sky at night, he will able to see the Milky Way by naked eye .
2. If noise pollution doesn't happen regularly, it will not cause stress or nuisance .
3. If water pollution doesn't get more serious in the future, it will not affect the developement of economy and society 

4. If Australia doesn't invest in water in Vietnam with good results, half of the population in the rural areas doesn't access to fresh water.

5. If you don't use compact light bulbs, you won't save a lot of energy

6. If we have more space, we will plant more trees.

If there weren't too much light pollution, we could see the stars at night. 

If the water weren't polluted, the fish would not be dead. 

If light pollution did not happen, animals would not change their behavior patterns. 

If we don't waste paper, we can save thousands of trees.

Exercise 7: Combine each pair of sentences into one sentence using “enough” with infinitive

1. It’s not very dark. We can’t see the stars clearly.

→ It’s not very dark enough to see the stars clearly.

2. It was very hot. You could fry an egg on the pavement.

→ It was very hot enough to fry an egg on the pavement.

3. Would you be very kind and turn down the radio a little?

→ Would you be very kind and turn down the radio a little enough?

4. He is strong. He can carry it.

→ He is strong enough to carry it.

5. It’s not very cool. We can’t go out.

→ It’s not very cool enough to go out.

Exercise 8: Choose the correct answer

1. The River Amazon (flow/ flows/ flew/ is flowing) into the Atlantic Ocean.

2. My sister and I (watch/ watched/ watches/ watching) the cartoons on TV every Saturday last summer.

3. I don’t have enough money (to pay/ for paying/ for pay/ paying) for a taxi.

4. Surely 15 minutes is enough time (for you to have a bath/ to you for having a bath/ to you to have a bath/ for you for having a bath).

5. This is my (best/ well/ perfectly/ good) ear. I’m rather deaf in the other one.

6. He prefers (go for a swim to study/ going for a swim to study/ going for a swim to studying/ go for a swim to studying).

7. Each of the rooms (has/ have/ have had/ are having) a different color.

8. He rarely shows his feelings. He’s rather (reserved/ sociable/ humorous/ helpful).

9. The audience didn’t laugh (at/ on/ to/ for) his joke.

10. He worked as a volunteer (at/ for/ to/ with) Oxfarm.

Exercise 7: Combine each pair of sentences into one sentence using “enough” with infinitive
1. It’s not very dark. We can’t see the stars clearly.
 ........It is not dark enough for us to see the starts clearly ...............................................................................................................................
2. It was very hot. You could fry an egg on the pavement.
 ............It was hot enough for you to fry an egg on the pavement...........................................................................................................................
3. Would you be very kind and turn down the radio a little?
 ...........Would you be kind enough to turn down the radio a little............................................................................................................................
4. He is strong. He can carry it.
 ......He is strong enough for him to carry.................................................................................................................................
5. It’s not very cool. We can’t go out.
 ........It is not cool enough for us to go out...............................................................................................................................
Exercise 8: Choose the correct answer
1. The River Amazon (flow/ flows/ flew/ is flowing) into the Atlantic Ocean.
2. My sister and I (watch/ watched/ watches/ watching) the cartoons on TV every Saturday last summer.
3. I don’t have enough money (to pay/ for paying/ for pay/ paying) for a taxi.
4. Surely 15 minutes is enough time (for you to have a bath/ to you for having a bath/ to you to have a bath/ for
you for having a bath).
5. This is my (best/ well/ perfectly/ good) ear. I’m rather deaf in the other one.
6. He prefers (go for a swim to study/ going for a swim to study/ going for a swim to studying/ go for a swim to
studying).
7. Each of the rooms (has/ have/ have had/ are having) a different color.
8. He rarely shows his feelings. He’s rather (reserved/ sociable/ humorous/ helpful).
9. The audience didn’t laugh (at/ on/ to/ for) his joke.
10. He worked as a volunteer (at/ for/ to/ with) Oxfarm.