1. have been living

2. have been working

3. has read

4. have known

5. haven't seen

6. haven't worked

7. have bought

8. haven't planned

9. have you been

10. has written

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

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

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

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

5.      5. I (not/see)      did not saw                    her since last month.

6.      6. I (not/work)     did not worked                       have not worked today.

7.      7. We (buy)       buys                     a new lamp.

8.      8. We (not/plan)      have not planed                     our holiday yet.

9.      9. Where (be/you)   are you                            ?

10.  10. He (write)          writes                     five letters.

1 . have lived

2 . have worked

3 . has read

4 . have known

5 . haven't seen

6 . haven't worked

7 . have bought

8 . haven't planed

9 . has you been

10 . has written

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

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

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

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

5.      5. I (not/see)            have not seen              her since last month.

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

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

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

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

5.      5. I (not/see)       have not seen                    her since last month.

6.      6. I (not/work)       have not worked                     have not worked today.

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

8.      8. We (not/plan)                have not planed           our holiday yet.

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

10.  10. He (write)              has written                 five letters.