I.

1 Have you ever seen that film?

2 We have had two grammar tests so far.

3 Nick has met Steve three times this week.

4 Sally and Ewa have already returned.

5 How long have you known him?

6 He has never played the violin.

7 Sandy has not answered my letter yet.

8 My friend has just finished his work.

9 It has been the first time they have slept in a tent.

10 I have not contacted him since last Friday.