1) We've have already had lunch. (have)
2) They have begun painting the living room. (begin)
3) He has neverdriven a motorbike before. (drive)
4) She has finally come.
5) Have we ever (met) before?
6) Where have we put the car keys?
7) I'm sorry, I'm so tired. I haven't sleept.
8) You have boughy a lot of clothes recently. (buy)
9) Have you chosen your university? (choose)
10) Why has John already left? (leave)