Present Perfect Tense : Unit 19, It is done / it was done (passive)

A.      The passive is :

Past participle
Present Past	Am/is/are (not) Was/were	+	Cleaned       done Exported     made Damaged    broken

The past participle of regular verbs is –ed (cleaned/damaged, etc.). For a list of irregular past participles (made/seen, etc.), see Appendixes 1 and 2.

-          Butter is made from milk.

-          Oranges are imported into Canada

-          How often are these room cleaned?

-          I am never invited to parties.

-          This house was built 100 years ago.

-          These houses were built 100 years ago.

-          When was the telephone invented?

-          I wasn’t invited to the party last week.

-          Six people were injured in the accident yesterday

B.      We say was/were born :

-          I was born in Los Angeles in 1974. (not “I am born”)

-          Where were you born?

C.      Passive+by . . . :

-          We were woken up by the noise. (= The noise woke us up)

-          The telephone was invented by Alexander Graham Bell in 1876.

-          My Brother was bitten by a dog last week.