Английский язык Present Perfect

1-hasn't walked
2-Have they arrived; haven't;
3-has enjoyed;
4-has slept;
5-has given;
6-has knocked;
7-have seen;
8-have already eaten;
9-has walked;
10-has been;
11-Have you ever been;
12-has spoken;
13-hasn't started;
14-has rained;
15-has been;
16-has found;
17-have studied;
18-have written;