Chuyển sang bị động thì hiện tại hoàn thành: They have not used this machine for ages.

chuyển sang bị động thì hiện tại hoàn thành :
1. they have not used this machine for ages.
2. peter has sung this song.
3. she has eaten all the eggs.
4. famous engineers have designed the aircraft.
5. Have several people just seen the accidents?
6. The news has surprised me.
7. John has broken my watch.