`-` BĐ :

`+` HTĐ : S + is / am / are + VpII ( by O )

`+` QKĐ : S + was / were + VpII ( by O )

`+` HTHT : S + have / has + been + VpII ( by O )

`+` ĐTKT : S + ĐTKT + be + VpII ( by O )

`13`.I haven't ever been treated with such kindness

`14`.His story isn't believed

`15`.The dam may be broken by a sudden increase in water pressure

`16`.I was know about it by a man I know

`17`.He can't be found at home for he is always on the move

`18`.Human life has completely been changed by Science and Technology

`19`.My Cole used to be visited by John at weekends

`20`.The river bank is covered by weeds

`\text{# TF}`

Đáp án:

`13,` I haven't ever been treated with such kindness.

`14,` His story isn't believed.

`15,` The dam may be broken by a sudden increase in water pressure.

`16,` I was know about it by a man I know.

`17,` He can't be found at home for he is always on the move.

`18,` Human life has completely been changed by Science and Technology.

`19,` My Cole used to be visited by John at weekends.

`20,` The river bank is covered by weeds.

Giải thích:

`@` Bị động `:`

- Hiện tại đơn `:` S + is / am / are + V3 / PII ( by O ).

- Quá khứ đơn `:` S + was / were + V3 / PII ( by O ).

- Hiện tại hoàn thành `:` S + have / has + been + V3 / PII ( by O ).

- Động từ khuyết thuyết `:` S + ĐTKT + be + V3 / PII ( by O ).