$\text{11.}$ The cake is being cut with a sharp knife by Mary.

$\text{→}$ Thì HTTD: S + is/ are/ am + being + Ved/ P2 + (by)

$\text{12.}$ The woman with a red hat was looked at by the children.

$\text{→}$ Thì QKD: S + was/ were + Ved/ P2 + (by)

$\text{13.}$ This machine mustn't be used after 5.30.

$\text{→}$ Modal Vs: S + Modal Vs + be + Ved/ P2 + (by)

$\text{14.}$ Luckily for me, my name wasn't called.

$\text{15.}$ I knew that he had been told of the meeting.

$\text{→}$ Thì QKHT: S + had been + Ved/ P2 + (by)

$\text{16.}$ I hasn't ever been treated with such kindness.

$\text{→}$ Thì HTHT: S + have/ has + been + Ved/ P2 + (by)

$\text{→}$ Nobody mang nghĩa phủ định

$\text{17.}$ Is English taught here?

$\text{→}$ Thì HTD: S + is/ are/ am + Ved/ P2 + (by)

$\text{18.}$ Were you given some exercises by your teacher?

OR Were some exercises given to you by your teacher?

$\text{→}$ Khi có 2 tân ngữ: 1 tân ngữ chỉ người và 1 tân ngữ chỉ vật

+ Nếu dùng tân ngữ chỉ người thì dùng như bth

+ Nếu dùng tân ngữ chỉ vật: S + be + Ved/ P2 + to sb + (by)

$\text{19.}$ Has the window of the lab (laboratory) been changed?

$\text{20.}$ Will the children be brought home by the buses?

OR Will home be brought to the children by the buses?

$\text{→}$ Thì TLD: S + will be + Ved/ P2 + (by)