`II`

`1` If there weren't so much smoke from factories, the air in this area would be clean

`2` If they didn't have four air conditioners in their house, they wouldn't spend much money on electricity.

`3` If people didn't throw rubbish on the beach, the beach would look attractive.

`4` If the soil weren't too polluted, tree could grow here.

`5` If this part of the river weren't too dirty, we could swim in.

`6` If he had enough money, he could buy a new car.

`III`

`1` This area wouldn't be so smelly if there weren't a big garbage dump nearby.

`2` If they didn't use electricity to catch fish, a lot of fish wouldn't die and float on the water surface.

`-` a lot of + N (số nhiều đếm được/không đếm được): nhiều ...

`-` on sth: trên cái gì (bề mặt)

`3` The soil wouldn't be so polluted if the farmers didn't use too much chemical fertilizer and herbicide.

`4` If he had more time to study, he would be an excellent student.

`-` have time to do sth: có thời gian làm gì

`5` What would happen if there were no water and air?

`=======`

`-` Câu điều kiện loại `2` `->` diễn tả hành động, sự việc không có thật ở hiện tại:

`@` If + clause (QKĐ), S + would/could (not) + V