Chia dang đúng của động từ

1. Nam ( visit ) ...... the bus to school. 
2 . Tom ( visit) ...... london twice.
3. You ever ( see)......  Elephant? 
4. I (do) ..... maths homework  yesterday . 
5. The chirldren ( not be) ..... At home last weekkend
6. I ( live)  .....here since 2000
7. He ( study) .......... English for three yaers 
8. They ( come) ..... here many times
9. She always ..... ( cook) meals . 
10. He already ( read ) .... these book. 
11. I ever ( see) ........ this cartoon 
12. He ( have) .....lunch yet? 
13. They ( visit) ..... A farm two weeks ago
14. She just  ..... ( visit ) us . 
15. We ( not see) ....... her parents yet
16. You ( phone) ...... your aunt last weesks? 
17. His sister ( works) ...... for this company since 2018
18 . They ( build)  ...... those building recently 
19. He ( play) ....... football at the moment 
20. I ( not be) ..... successful so far 
21. Up to now he ( win) .... the prize