`1`. His story isn't believed.

`->` Câu bị động hiện tại đơn: S + is/am/are + (not) + Vpp

`2`. I have never been treated with such kindness.

`->` Câu bị động hiện tại hoàn thành: S + have/has + (not) + been + Vpp

`3`. I wasn't told that George was ill.

`->` Câu bị động quá khứ đơn: S + was/were + (not) + Vpp

`4`. This street wasn't swept this week.

`->` Câu bị động quá khứ đơn: S + was/were + (not) + Vpp

`5`. This room hasn't been used for ages.

`->` Câu bị động hiện tại hoàn thành: S + have/has + (not) + been + Vpp

1, His story isn't believed

2, I haven't ever been treated with such kindness

hoặc I have never been treated with such kindness

3, I wasn't told that George was ill.

4, This street wasn't swept last week.

5, This room hasn't been used for ages

hoặc This room has never been used for ages

Bonus: 

Active (negative): No one/ Nobody + V + O

⇒ Passive: S (o) + tobe + not + P2 (không có by no one/nobody)

$\text{#BTS}$