Put the verbs in the correct form

Put the verbs in the correct form.

16. They ( not be ) __________ at home yesterday.

17. He (go) __________ to Ha Long Bay for 2 weeks.

18. Mary  ( work) __________ here since last night.

19. Nam  ( take ) __________ the bus to school since last night.

20. He ( play ) __________ volleyball for 10 years .