помогите пожалуйста, нужно поставить в preasent perfect
1) elena (not meet) my new boyfriend yet.
2) I (visit) America twice.
3) Paul (never/win) a competition in his life.
4) (Sally and Mark/find) a new house yet? - no? they lookat over twenty houses this week, but they (not see) one they like.
5)We (buy) tickets for the football match on saturday
6) (you/see) her ?
7) (Sarah/see) that film ? Let s go and see it tomorrow if she (not see) it yet.
8) You (not answer) my question yet.

1) elena (has not met) my new boyfriend yet. 2) I (have visited) America twice. 3) Paul (has never/won) a competition in his life. 4) (Have Sally and Mark/found) a new house yet? - No, they have looked at over twenty houses this week, but they (have not seen) one they like. 5)We (have bought) tickets for the football match on Saturday. 6) (Have you/seen) her ? 7) (Has Sarah/seen) that film? Let's go and see it tomorrow if she (has not seen) it yet. 8) You (have not answered) my question yet.