20. Coffee used to be drunk by Peter every morning last year
21. A new hospital must be built in this area
22. This room has been used to store old things
23. A lot of homework is given us by the teacher
24. The walls were painted green by my brother
25. A party will be held in this house by Peter next week
QKĐ: S + was/ were + PP + (by O)
HTĐ: S + am/ is/ are + PP + (by O)
HTTD: S + am/ is/ are + being + PP + (by O)
HTHT: S + have/ has + been + PP+ (by O)
TLĐ: S + will be + PP + (by O)
TLG: S + is/ am/ are + going to + be + PP + (by O)
S + modal verb (should, must, have to, can,...) + be + PP + (by O)
