Forming Passives With Modals

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Affirmative Form	Object + may, must, can, could, ought to, should + be + verb3
Question Form	Must, may, can, should, might + object + be + verb3 (past participle)

Something must / can / should... be done by someone at sometime.

Active : Our English teacher may give an exam today.
Passive: An exam may be given by our English teacher today.

Active : Thomas has written many books.
Passive: Many books have been written by Thomas.

Active : Do you have to pay the bill before leaving the restaurant?
Passive: the bill have to be paid before leaving the restaurant?

Active : Juan can give them some information about the job.
Passive: Some information can be given about the job by Juan.
Passive2: They can be given some information about the JOB by Juan.

Active : You must obey the traffic rules.
Passive: The traffic rules must be obeyed.

Quick Exercise

Put the following sentences into passive voice. (Modals)

1.      Active  : We may ask him a few questions.
    Passive :A few questions may be asked by him

2.       Active  : I can manage a motor car.
    Passive : A motor car can be managed

3.      Active  : You must inquire the way.
    Passive : The way must be inquired

4.      Active  : He might give you a chance.
    Passive : A chance might be given

5.      Active  : I could show you his house if you would permit me.
    Passive : His house can be showed you if you would permit me

6.      Active  : I should enjoy a sea-voyage.
   Passive  : A sea-voyage should be enjoyed