II.Write the correct form of each verb in brackets

1. If it (be) …………… sunny next week, we (plant) ……………… the vegetables.

2. If we (recycle) …………… more, we (help) ………………… our Earth.

3. We (save) …………… a lot of trees if we (not waste) …………… so much water.

4. More people (have) ……………… fresh water if we only (use) ……………… the water we need.

5. If the river (not be) ……………… dirty, there (be) ……………… more fish.

6. If the Earth (be) …………… warmer, the sea level (rise) ……………

7. If the sea level (rise) ……………, some countries (disappear) ………………

8. If we (reduce) ……………… soil pollution, we (have) ……………… enough food to eat.

9. If we (not have) ………………. Enough food, we (be) ……………… hungry.

10. If we (be) ………………… hungry, we (be) ………………… tired.

Exercise 1: Chia dạngđúngcủađộngtừtrongngoặc ở thìquákhứhoànthành.

1.  Yesterday they went home after they (finish)      their work.

2.  When we came to the stadium, the match (alreadystart)            

3.  Many people(move)           to the new place before the stormoccurred.

4.  I sat down and rested after they(go)      

5.  Before he died,he (be)          ill for severaldays.

6.  Last night before he watched TV,he(do)      the exercise.

7.  She went to the department aftershe(clean)      the floor.

8.  When I got to the party, they (go)       home.

9.  By the time the police arrived, the house (be)       burned down.

10.  By last year, twenty schools in this province (be)      built.

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) _______________

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

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

2. If the lake (not/ be)________________________ polluted, there would be a lot of fish.

3. Most people (leave) _____________________ before the volcano erupted.

4. Ten new houses (build) _____________________ in the town every year.

5. Mrs. Loan (teach) ____________________ English for more than 10 years.

II. Fill in the correct verb form.

1.   They (come) .......................... back home after they (finish) .......................... their work.

2.   She said that she (meet) .......................... Mr. Bean before.

3.   Before he (go) .......................... to bed, he (read) .......................... a novel.

4.   He told me he (not/wear) ...................................... such kind of clothes before.

5.   When I came to the stadium, the match (start) ......................................

6.   After Nick (do) ............................ his homework, he (go) ............................ to bed last night.

7.   Mai (live) ............................ in Hai Phong for five years before she (move) ............................ to Ha Noi three years ago.

8.   Phong (tell) .......................... me yesterday that he (learn) .......................... French for a year.

9.   Ms. Hong (work) ............................ at our school for twenty years before she (retire) ............................ last June.

10. By the time I (get) ....................................... to Nick’s house, his party (already/ start) ................................................