A. The office is cleaned everyday
The office was cleaned everyday
Compare active and passive:
Somebody cleans the office everyday [active]
The office is cleaned everyday [passive]
Somebody cleaned the office everyday [active]
The office was cleaned yesterday [passive]
B. The passive is:
Am/is/are/wa/were [not] + cleaned, invented, injured, done, taken, built, etc.
The past participle of regular verbs is –ed [cleaned/damaged, etc].
· Butter is made of milk.
· Oranges are imported into Britain.
· 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 anybody injured in the accident? Yes, two people were taken to hospital.
C. Was/were born
· I was born in London in 1962 [not I’m born]
· Where were you born?
D. Passive + by …
· We were woken up by a loud noise. (= the noise woke us up)
· The telephone was invented by Alexander Bell in 1876.
· My brother was bitten by a dog last week.