Unit 20. is done / was done (passive 1)

BASIC GRAMMAR IN USE

 

Unit 20. is done / was done (passive 1)

 

The office is cleaned every day.

The office was cleaned yesterday.

 

Somebody cleans the office every day.(active)

The office is cleaned every day.(passive)

 

Somebody cleaned the office yesterday.(active)

The office was cleaned yesterday.(passive)

 

*The passive is:

<simple present, simple past> + <past participle>

 

Butter is made from milk.

Oragnes are imported into Canada.

How often are these rooms cleaned?

 

This house was built 100 years ago.

These houses were built 100 years ago.

When was the telephone invented?

We weren't invited to the party last week.

 

*was/were born

I was born in Colombia in 1995. (not I am born)

"Where were you born?"

 

*passive + by...

The telephone was invented by Alexander Graham Bell in 1876.

(=Alexander Graham Bell invented it.)

I was bitten by a dog a few days ago.