22. The 22nd Sea Games were held in Viet Nam in 2003

23. The street is cleaned everyday

24. The cheque must be signed by the manager

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)

22. They held the 22nd Sea Games in Viet Nam in 2003

=> the 22nd Sea Games in Viet Nam was help in 2003

23. They clean the street everyday

=> The street is cleaned everyday

24. The manager must sign the cheque

=> the cheque must be signed by the manager

P/S: bị động HTĐ: S + V(s/es) + O => S+ is/am/are + VpII + (by + O)

        Bị động QKĐ: S + V-ed + O => S + was/were + VpII + (by +O)

        Bị động với động từ khuyết thiếu:

     S+ must/will/can  + Vnt => S + must/will/can + to VpII + ( by +O)