Ответ:

1) have known

2) had learnt

3) saw

4) have been

5) has already begun

6) has been living

7) had written

8) ate

9) gives

10) spoke

11) take

12) have done

13) has bought

14) has had

15) have been working

16) has found

Объяснение:

В большинстве случаев используется Perfect Tenses или Perfect Continuous Tenses. Так же есть Present и Past Simple