1. This area won't be so smelly if there isn't big garbage dump nearby.

2. If they don't use electricity to catch fish, lot of fish won't die and float on the water surface.

3. The soil won't be so polluted if farmers don't use much chemical fertilizer and herbicide.

4. If he has more time to study, he will be an excellent student.

5. What will happen if there is no water and air?

xin trl hay nhất ạ

If 2:

If + S + were , S + would / could + V1 

If + S + V2/ed , S + would / could + V1 

------------------------------------------------

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 small fish wouldn't die and float on the water surface.

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

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

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

`color{orange}{~MiaMB~}`