Ответ:

1 John has already spoken to me.

2 He has already read a book.

3 They have just gone home.

4 I have just seen him.

5 He has never been to London.

6 They have never given me the book.

7 I have never seen this film.

8 She has never been in Siberia.

9 I haven't meet you in Moscow since 1972.

10 They haven't spoken English since last year.

11 I haven't seen her there since September.

12 She hasn't read this book since childhood.

13 Your friends have written a letter to you this week.

14 He has left for Moscow this month.

15 I have learned grammar rules today.

16 They have finished their work this year.