Passive voice : 1. Have you sent the Christmas cards to your family? 2. The committee appointed Alice secretary for the meeting. 3. He hides the broken cup in the drawer. 4. They keep this room tidy all the time. 5. They all voted the party a great success.

`1.` Have the Christmas cards been sent to your family (by you)?

`-` Thì hiện tại hoàn thành:

A`:` Have/ Has + S + V(pp) + O?

`->` P`:` Have/ Has + S + been + V(pp) + (by O)?

`2.` Alice was appointed secretary for the meeting by the committee.

`-` Thì quá khứ đơn:

A`:` S + Ved/ V2 + O

`->` P`:` S + was/ were + V(pp) + (by O).

`3.` The broken cup is hidden in the drawer (by him).

`-` Thì hiện tại đơn`:`

A`:` S + V(s/es) + O

`->` P`:` S + am/ is/ are + V(pp) + (by O).

`-` hide - hid - hidden: giấu

`4.` This room is kept tidy all the time (by them).

`-` keep - kept - kept: giữ

`5.` The party was voted a great success (by them).