Use the correct form of the verb in brackets.
1. If you
(not listen), you
(not understand).
2. If he
(finish) early, he
(play) video games.
3. If we
(not leave) now, we
(be) late.
4. If she
(study) hard, she
(get) good grades.
5. If they
(not hurry), the shop
(close).
6. If I
(have) time, I
(help) you.
7. If you
(not water) the plants, they
(die).
8. If he
(call), tell him I
(be) back soon.
9. If we
(not clean) our room, Mom
(not let) us go out.