IS BEING DONE ……. HAS BEEN DONE

PASSIVE VOICE 

·         Is/are being ….(present continuous passive)

Somebody is painting the door. (Active)

Door is being painted the. (Passive)

ü  My car is at the garage.  It is being repaired. (= somebody is repairing it)  

ü  Some new houses are being built opposite the park. (=somebody is building them)

Compare the present continuous and simple present:

ü  The office is being cleaned at the moment. (continuous)

The office is cleaned every day. (Simple)  

IS DONE…. WAS DONE

PASSIVE VOICE

The office is cleaned every day.

The office was cleaned yesterday.

·         Compare active and passive voice:

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            : am/is/are + v3 (past participle)

Past tense                    : was/were + v3 (past participle)

The past participle of regular verb is –ed (cleaned/damaged, etc)

For a list of irregular past participles (done/built/taken, etc).

ü  Butter is made from milk.

ü  Oranges are important into Britain.

ü  This house was built 100 years ago.

ü  These houses were built 100 years old.

·         Passive + by…..

ü  We were woken up by a loud noise. (= the noise woke us up)

ü  The telephone was invented by Alexander Bell in 1876.

ü  My brother was bitten by a dog last week.

Taken from: Essential Grammar in Use