I) Put the verbs in the correct tense
1. They often (visit) their parents on Saturday.
2. He ( not be) at home now.
3. Our teacher usually (give) us many exerrsices.
4. The sun (warm) the air and (give) us light.
5.The teacher always (point) at the black-board when he (want( to explain ssomething.
6. i always (meet) him on the cornner of this street.
7. He ( not do) morning exersices regularly.
8. Water (boil) at 100 defrees centigrade.
9. What time he ( get up)?
10. Miss White's students ( not be) big.
11 Lan's brothers (be) doctor?
12. Nam's father (be) Mai's teacher.
13. Mai and Hoa ( not be) Mr Tam's students.
14. You and I (be) good friends.
15. Every morning Lan ( not do) morning exercises.
16. I (not go) to school at 6.30 every day.
17. He (brush) his teeth every morning.
18. Mai ( get) dressed at 6.50 every morning.
19. Hoa ( not go) to school by bus every day.
20. What you and your brother (do) in the morning?
II) Change these sentences into plural
1. There is a box under the table (2)
2. He is an old man.
3. That woman often goes to work by car.
4. This man has a happy family.
5. Do this boy have a pet? (some)
6. What do that woman do? She is a policewoman.