Ответ:

1) She has had a dog for three years.

2) He has known David since 1999.

3) They have lived in this house for a long time.

4) I have been here since 4 o’clock.

5) We have studied English for five years.

6) I haven’t eaten since yesterday.

7) He hasn’t swum for four months.

8) Have you seen Adam since your last meeting?

Объяснение: