1. I have never been met before
2. the poor was donated book by Tim
3.the homeless has been helped by time since he moved to London
4. I have been sent any mails by Ba since last Christmas
5. an alien has been seen before
6.bob has been talked at the first time
7.jeans haven't been worn before
8 he has been supported at the first time
9.he has been talked at the first time
10.maize has been eaten since we ran out of money
11. Hai Phong has been visited by gorge since last month
12, their feelings have been shared with us since 2012
13 his math ability hasn't been improved for a fortnight
14. this road has been used for ages
15. an interesting film have been seen
16.he has been met for the first time
17 a boring book has been read by ba
18. ha long bay have never been drawn before
1. Form:
Khẳng định: S + have / has + been + V3/-ed + (by + O)
Phủ định: S + haven’t / hasn’t + been + V3/-ed + (by + O)