Unit 41-42: Passive

A. This house was built in 1930.

Compare:

My granfather was a builder. He built this house in 1930.

This house is quite old. It was built in 1930.

B. 

A lot of money was stolen in the robbery.

C. Cacs dang thu dong.

1. Present simple.

active: Somebody cleans this room everyday.

passive: This room is cleaned everyday.

2. Past simple.

active: Somebody cleaned this room yesterday.

passive: This room was cleaned yesterday.

3. Infinitive.

active: Somebody will clean the room later.

passive: The room will be cleaned later.

4. Perfect infinitive.

active: Somebody should have cleaned the room.

passive: The room should have been cleaned.

5. Present perfect.

active: The room looks nice. Somebody has cleaned it.

passive: The room looks nice. It has been cleaned.

6. Past perfect.

active: The room looked nice. Somebody had cleaned it.

passive: The room looked nice. Somebody had been cleaned.

7. Present continous.

active: Somebody is cleaning the room at the moment.

passive: The room is being cleaned at the moment.

8. Past continous.

active: Somebody was cleaning the room when I arrived.

passive: The room was being cleaned when I arrived.