Chuyển sang câu bị động

11, This is the second time we have been written to about this.

- Bị động thì HTHT:

(+) S+ have/ has + been + V3/ed (+by O)

12, We have been taught French by Mr. Smith for two years.

- Tương tự cấu trúc câu 11

13, The children weren't looked after properly.

- Bị động thì QKĐ:

(-) S+ was/were + not + V3/ed (+by O)

14, This street wasn't swept last week.

- Tương tự cấu trúc câu 13