» » Active and passive voice

The places of subject and object in sentence are inter-changed in passive voice. 3rd form of verb (past participle) will be used only (as main verb) in passive voice.

In active voice 

  Adam cleaned the kitchen

in passive voice  

  The kitchen was cleaned by Adam

 Formation of the passive form

  Active  Passive
 Present simple
 She does the homework.
 am/are/is + past participle
 The homework is done (by her).
 Past simple
 He did the homework.
 was/were + past participle
 The homework was done (by him).
 Present continuous
 She is doing the homework.
 am/are/is + being + past participle
 The homework is being done (by her).
 Past continuous
 He was doing the homework
 was/were + being + past participle
 The homework was being done (by him).
 Present perfect
 She has done the homework.
 have/has + been + past participle
 The homework has been done (by her)
 Past perfect
 He had done the homework.
 had + been + past participle
 The homework had been done (by him).
 future (will)
 She will do the homework.
 will + been + past participle
 The homework will be done (by her).
 future (going to) He is going to do the homework.  am/are/is going to + be + past participle
 The homework is going to be done (by him).
 She wants to do the homework.
 to be + past participle
 She wants the homework to be done (by her).
 He can do the homework.
 modal + be + past participle
 The homework can be done (by him).
 They are building the house.
 being + past participle
 The house is being built.
Present Conditional
When I have time, I do the filing.
 get +past participle
 When I have time, the filing gets done

  Indefinite 1         cont 2              per 3       per. con 4
2 2 4 0
2 2 4 0
2 0 4 0

Here  in second table a simple trick to understand change of sentence in passive voice.
code 2 = continuous
code 4=  perfect continuous
code 0 = no change

Present indefinite will change according to position no.2 or continuous, however present continuous change according to position no.2 or no change.

Intransitive and stative verbs
Intransitive verbs are verbs that have a subject but don’t have an object.
Ex: run, fall, die, sleep, arrive

Use of preposition after following verbs
Not:- surprised, astonished, satisfied + at
         pleased, interested, + in
         known + to

Change in pronouns
subject          object
  I                    me
  we                 us
  He                 him
  She               her
  they               them

1. when sentence start with wh- words in passive voice same started wh- words.
    but when sentence start with who in passive voice add By before whom.

    example: 1. why did America attack Taliban ? (active voice)

                     why was Taliban attacked by America ? (passive voice)

                 2. who broke this cup? (active voice)
                     By whom was this cup broken ? (passive voice)

who-----------By whom

sentence of ORDER

Let +object + be + v3

1. Do it .
    let it be done.

2. shut the door.
   let the door be shut. 
sentence of suggestion

object + should be + v3

sentence of Request

In passivise voice skip please, kindly and begin if sentence is affirmative YOU ARE REQUEST TO 
and in negative sentence YOU ARE REQUESTED NOT TO  

1. please shut the door.
    you are request to shut the door.

sentence begin with Let 

Let + object +be+ v3 + by + subject 

Begin with nobody/ no one   

In passive voice skip nobody/ no one and make negative sentence.
 1. No body can answer such question.
     such question can not be answer 

begin with It is time

1. It is time to open the office.
    it is time for the office to be opened.

2. it is time to shut the shop.
    it is time for the shop to be shut.