IV.  
1.If the water weren't too dirty, we could bathe in this part of river

2.If we didn't have four air conditioners in our house, we wouldn't spend much money on electricity

3.If I had Linh's address, I could write to her 

4.If Dick didn't drive carelessly, he wouldn't often cause accidents

5.If we didn't waste a lot of money on unnecessary things, we could give much help to the poor

V. 

1.If he had hurried, he wouldn't have missed the train

2.If my brother had left the car keys, I would have picked him up at the station

3.If it hadn't rained, we would have gone

4.If we had had enough money, we would have gone on holiday

5.If Susan hadn't eaten four cream cakes, she wouldn't have felt sick

6.If he had followed this treatment, the patient wouldn't have died

7. If we had had a map, we wouldn't have got lost.

8. If he hadn't been late every day, he wouldn't have lost his job

9. If Peter didn't eat so many chips, he wouldn't be fat 

10. If Robert hadn't started smoking cigarettes, he wouldn't have got a bad cough

11.If those people had been prepared to face the floods, the consequence wouldn't have been disastrous

12.If it hadn't rained all the time, we would have enjoyed our camping trip last week

13.If trees in the nearby forests hadn't been cut down without control, that village wouldn't have been heavily flooded last year

14. If we hadn't started our vacation too late, we wouldn't have had to suffer bad weather 

15.If she had taken her friends' advice, she wouldn't have failed in her business

Vote cho mik ctlhn nhé

*  ( if 2: If + S1 + V2/ed, S2 + might/ would + Vinf ).

1 If the water wasn't too dirty, we could bathe in this part of river.

2 If we didn't have four air conditioners in our house, we wouldn't spend much money on electricity.

3 If I had Linh's address, I could write to her.

4 If Dick drove carelessly, he would often cause accidents.

5 If we didn't waste a lot of money on unnecessary things, we could give much help to the poor.

* If 3: If + S + had + Vpp, S2 + would + have + Vpp.

1 If he had hurried, he wouldn't have missed the train.

2 If my brother had left the car keys, I would have picked him up at the station.

3 If it hadn't rained, we would have gone.

4 If we had had enough money, we would have gone on holiday.

5 If Susan hadn't eaten four cream cakes, she wouldn't have felt sick.

6 If he had followed this treatment, the patient wouldn't have died.

7 If we had had a map, we wouldn't have got lost.

8 If he hadn't been late every day, he wouldn't have lost his job.

9 If Peter didn't eat so many chips, he wouldn't be fat. 

10 If Robert hadn't started smoking cigarettes, he wouldn't have got a bad cough.

11 If those people had been prepared to face the floods, the consequence wouldn't have been disastrous.

12 If it hadn't rained all the time, we would have enjoyed our camping trip last week.

13 If trees in the nearby forests hadn't been cut down without control, that village wouldn't have been heavily flooded last year.
14 If we hadn't started our vacation too late, we wouldn't have had to suffer bad weather.

15 If she had taken her friends' advice, she wouldn't have failed in her business.