`1.` This flower is watered by my father every morning

`2.` Fiona was invited to birthday party by John last night

`3.` The dinner is being prepaired in the kitchen by her mother

`4.` Our teeth should be cleaned twice a day

`5.` The English grammar has been explained by our teachers 

`6.` Some pieces of paper were being cut on the table at 7 pm by Susan yesterday

`7.` Mary isn't helped to solve this problem

`8.` The documents have been delivered by Matha 

`9.` A new product is going to be developed by the company 

`10.` The money must be returned by John soon

QKĐ: S + was/ were + PP + (by O)

QKTD: S + was/ were + being + PP + (by O)

QKHT: S + had + been + 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)

Modal verb: S + modal verb (should, must, have to, can,...) + be + PP + (by O)