1. If we recycle more, we (help) .. ………………………… the earth.

2. Factories (not dump)… ………………. waste into the rivers if the government fines them heavy.

3. If people travel to work by bus, there (be) ………………….…….. fewer cars fumes.

4. We will save thousands of trees if we (not waste)……………………….. paper.

5. If we use waste water carefully, more people (have)…………...…… fresh water.

6. If you (be)……………..…. the president, what ………………..you (do)……………….?

7. They get sick so often. If they (exercise)…………… more, they (be)……….. healthier.

8. If I (have)……………… one million US dollars, I (build)…………….. more parks in our city.

9. Ngoc’s mother is unhappy. If Ngoc (tidy)……………..……..……….. her room every day, her mother

(not be)……………………… so upset.

10. There isn’t a garden at our house. If there (be)……….., we (grow)……………….…..vegetables.

1.If we (recycle)  ________ more, we will help the Earth.

2. Factories (not dump) ______________waste into rivers if the government fine them heavily.

3. If people travel to work by bus, there (be)  ______________fewer car fumes.

4. We (save)  ________________thousands of trees if we don’t waste paper.

5. If we use water carefully, more people (have) ______________fresh water.

6. If the factory ( continue) ________________ dumping poison into the lake, all the fish and other aquatic animals will die.

7.If we recycle more, we (help) ________________ the Earth.

8. If people (travel)________________to work by bus, there will be fewer car fumes.

9. If he (study) ________________  harder, he can pass an exam.

10. She may be late if she (not hurry) ________________.

11.If you study harder, you (pass) ________________  the exam.

12. If you are kind to me, I (be) _______________  good to you.

Question IV.Combine 

1.If we (recycle)  ________ more, we will help the Earth.

2. Factories (not dump) ______________waste into rivers if the government fine them heavily.

3. If people travel to work by bus, there (be)  ______________fewer car fumes.

4. We (save)  ________________thousands of trees if we don’t waste paper.

5. If we use water carefully, more people (have) ______________fresh water.

6. If the factory ( continue) ________________ dumping poison into the lake, all the fish and other aquatic animals will die.

7.If we recycle more, we (help) ________________ the Earth.

8. If people (travel)________________to work by bus, there will be fewer car fumes.

9. If he (study) ________________  harder, he can pass an exam.

10. She may be late if she (not hurry) ________________.

11.If you study harder, you (pass) ________________  the exam.

12. If you are kind to me, I (be) _______________  good to you.

Question III. Put the verbs in brackets into the correct form.

1.If we (recycle) ________ more, we will help the Earth.

2. Factories (not dump) ______________waste into rivers if the government fines them heavily.

3. If people travel to work by bus, there (be) ______________fewer car fumes.

4. We (save) ________________thousands of trees if we don’t waste paper.

5. If we use water carefully, more people (have) ______________fresh water.

6. If the factory (continue) ________________ dumping poison into the lake, all the fish and other aquatic animals will die.

7.If we recycle more, we (help) ________________ the Earth.

8. If people (travel)________________to work by bus, there will be fewer car fumes.

9. We will save thousands of trees if we (not waste) _______________ paper.

10. Factories won’t dump waste into rivers if the government (fine) _______________ them heavily.

11. Our teacher (tell) _______________ us yesterday that he (visit) _______________ England in 1970.

12. Alan (have) _______hardly (prepare) ________for dinner when her husband (go) _______home

13. No sooner (have) ___________I (watch) _______TV than the phone (ring) __________

14. Before I (watch) __________ TV, I (do) _____________my homework.

15. After I (wash) _____________my clothes, I (sleep) _______________

Xắp xếp câu hoàn chỉnh.
1.causes/breathing/Air/problems/ pollution/.
......................................................

If/ we/more/recycle/the Earth/will help/We/./,
....................................................................
*Lưu ý: Trong câu có 2 từ viết hoa. 'If' và'We'.
3. You/talk to/ can / teachers/ putting/recycling bins/ in every classroom/ about.
.....................................................

Conditional Sentence Type I : Câu điều kiện loại 1

Question I. Put the verbs in brackets into the correct form.

(Chia những động từ trong ngoặc đơn vào đúng hình thức).

1.If we (recycle)  ________ more, we will help the Earth.

2. Factories (not dump) ______________waste into rivers if the government fine them heavily.

3. If people travel to work by bus, there (be)  ______________fewer car fumes.

4. We (save)  ________________thousands of trees if we don’t waste paper.

5. If we use water carefully, more people (have) ______________fresh water.

6. If the factory ( continue) ________________ dumping poison into the lake, all the fish and other aquatic animals will die.

7.If we recycle more, we (help) ________________ the Earth.

8. If people (travel)________________to work by bus, there will be fewer car fumes.

9. We save thousands of trees if we (not waste)_______________don’t waste paper.

10. Factories don’t dump waste into rivers if the government ( fine) _______________ them heavily.

Question II. Put the verbs in brackets into the correct form.

               (Chia những động từ trong ngoặc đơn vào đúng hình thức).

1. If he (study) ________________  harder, he can pass an exam.

2. She may be late if she (not hurry) ________________.

3.If you study harder, you (pass) ________________  the exam.

4. If you are kind to me, I (be) _______________  good to you.

5.If he (give) _______________ up smoking, as his doctor orders, he will be soon well again.

6. You (not pass) _______________   your driving test unless you drive more carefully.

7. He’ll be ill if he (not stop) ________________  worrying so much.

8. We’ll go to the beach tomorrow if it ( be) ________________  nice.

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

          (Kết hợp mỗi cặp câu sau để tạo thành câu điều kiện loại 1)

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

If…………………………………………………………………………………………………

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

If………………………………………………………………………………………………..

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

If…………………………………………………………………………………………………..

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

If…………………………………………………………………………………….....................

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

If…………………………………………………………………………………………………