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.

combine each pair of sentences using conditional sentences type 1

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

4 australia has invested in water in vn with good results. half of the population in the rural areas has access to fresh water

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

5 you use compact light bulbs.you savea lot of energy

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

6 we have more space we plant more trees

........if we have more space, we will plant more trees..................

1.A person looks at the sky at night.He is not able to see the Milky Way by naked eye

-> If a person looks at the sky at night, he won't be able to see the Milky Way by naked eye.

2.Noise pollution happens regulary.It causes stress or nuisance

-> If noise pollution happens regulary, it will cause stress or nuisance.

3.Water pollution gets more serious in the future.It affects the development of economy and societly

-> If water pollution gets more serious in the future, it will affect the development of economy and society.

4.Australia has invested in water in Vietnam with good results.Half of the population in the rural area has access to fresh water

-> If Australia has invested in water in Vietnam with good results,half of the population in the rural area will have access to fresh water.

5.You use compact light bulbs.You save a lot of energy

-> If you use compact light bulbs,you will save a lot of energy.

6.We have more space.We plant more trees

-> If we have more space,we will plant more trees.

Combine each pair of sentences,using conditional sentences type 1

1.A person looks at the sky at night.He is not able to see the Milky Way by naked eye

-> If a person doesn't look at the sky at night, he will able to see the Milky Way by naked eye

2.Noise pollution happens regulary.It causes stress or nuisance

-> if noise pollution doesn't happen regularly, it won't cause stress or nuisance

3.Water pollution gets more serious in the future.It affects the development of economy and societly

-> if water pollution doesn't get more serious in the future, it won't affect the development of economy and societly

4.Australia has invested in water in Vietnam with good results.Half of the population in the rural area has access to fresh water

-> if Australia doesn't have invested in water in Vietnam with good results, half of the population in the rural area won't have access to fresh water

5.You use compact light bulbs.You save a lot of energy

-> if you don't use compact light bulbs, you won't save a lot of energy

6.We have more space.We plant more trees

-> if we don't have more space, we won't 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.

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

1. The factory is located near our village. There is air pollution and noise pollution.

___If the factory weren't  located near our village, there would be air pollution and noise pollution.________________________________________________________________

2. The local people have to use water from the polluted river. They don’t have fresh water.

____If the local people had  fresh water, they wouldn't have to use water from the polluted river. _______________________________________________________________

3. Trees and grasses cannot grow here. The soil is badly polluted.

______If the soil weren't badly polluted, trees  and grasses could grow here _____________________________________________________________

4. Mr. Quang works in a noisy environment. His hearing becomes worse.

__________If Mr. Quang didn't work in a noisy environment, his hearing wouldn't become worse._________________________________________________________

Combine each pair of sentences to form a conditional sentence, using “if” Type 2.

1. The factory is located near our village. There is air pollution and noise pollution.

____________________ If the factory weren't located near our village, there wouldn't be air pollution and noise pollution._______________________________________________

2. The local people have to use water from the polluted river. They don’t have fresh water.

____________________ If the local people had fresh water, they wouldn't have to use water from the polluted river_______________________________________________

3. Trees and grasses cannot grow here. The soil is badly polluted.

_________________________ If the soil were not badly polluted, trees and glasses could grow here __________________________________________

4. Mr. Quang works in a noisy environment. His hearing becomes worse.

___________________  If Mr.Quang didn't work in a noisy environment, his hearing wouldn't become worse________________________________________________

I. Combine each pair of sentences, using “Because, Since, As”

1. Mary looks happy because she has just got good marks.

2. A computer can be used for various( thiếu đoạn sau nhé =')

 Question II. Combine each pair of sentences, using “Because, Since, As”

Because the exercise is not easy, i will have to consult my teacher

Chúc em học giỏi

Mary looks happy because/as/since she has just got good marks. 

I will have to consult my teacher the because/as/since exercise is not easy 

If tomorrow was fine, we would go for a picnic

Combine each pair of sentences to make a conditional sentence type 1.

1. Students are more aware of protecting the environment. Teachers teach environmental issues at school.

____________________ If teachers teach environmental issues at school, students will be more aware of protecting the environment._______________________________________________

2. Light pollution happens. Animals change their behaviour patterns.

_____________________ If light pollution happens, animals will change their behaviour patterns.______________________________________________

3. The levels of radioactive pollution decrease. We switch from nuclear power to renewable energy sources.

________________________  If the levels of radioactive pollution decrease, we will switch from nuclear power to renewable energy sources.___________________________________________

4. The water temperature increases. Some aquatic creatures are unable to reproduces.

_____________________ If the water temperature increases, some aquatic creatures will be unable to reproduces. ______________________________________________

5. People get more diseases. The water is contaminated.

_________________________  If the water is contaminated, people will get more diseases.__________________________________________

1. Students are more aware of protecting the environment. Teachers teach environmental issues at school.

_If Teachers teach environmental issues at school, Students will be more aware of protecting the environment_____________________________________________________________

2. Light pollution happens. Animals change their behaviour patterns.

___________If light pollution happens, animals will change their behaviour patterns._______________________________________________________

3. The levels of radioactive pollution decrease. We switch from nuclear power to renewable energy sources.

______If we switch from nuclear power to renewable energy sources, the levels of radioactive pollution decrease _____________________________________________________________

4. The water temperature increases. Some aquatic creatures are unable to reproduces.

_____If the water temperature increases, some aquatic creatures will unable to reproduces._____________________________________________________________

5. People get more diseases. The water is contaminated.

______If the water is contaminated, people will get more diseases_____________________________________________________________