1. I (live)               have lived              here since 1989.

2. They (work)             have worked                for this factory for 20 years.

3. He (read)                has read               this novel three times.

4. Hoa and I (know)              have known                each other since we were at the same class.

5. I (not/see)           haven't seen               her since last month.

6. I (not/work)             haven't worked         have not worked today.

7. We (buy)              have bought         a new lamp.

8. We (not/plan)            haven't planed         our holiday yet.

9. Where (be/you) has you been          ?

10. He (write)               has written                five letters.

11. (be/you)            Have you been                    at school?

12. School (not/start)             have not started                 yet.

13. (speak/he)              He have speaked                  to his boss?

14. No,he (have/not)             Have not had               the time yet.

15. The cat (just/catch)               have just catched                a mouse.

16. He (already/invite)             have already invited                  his friends.

17. Julia (make)               have made                   a table with three columns.

18. The teacher (lose)              have losed             the keys,so he can’t open the door.

19. I (just/clean)               have just cleaned                my bike.

20. My friends (give up)    has gived up  smoking.