passive voice with modal verbs

Passive Modals

Form:

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Can

BE

Could

HAVE BEEN

Done

Could

Will

Eaten

Will

Done

Would

Seen

Would

Eaten

May

Played

May

Seen

Might

Studied

Might

Played

Should

Drunk

Should

Studied

Must

Must

Drunk

Had to

Had better

Ought to

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To be able to

       The modal verbs use the passive voice the same way that all other tenses in English bởi. An Active sentence with a modal verb can be changed into a Passive sentence by making the subject of the active sentence the object of the passive sentence AND the object of the active sentence the subject of the passive sentence. For example:

I will give you a test on Wednesday.
A test will be given to tát you on Wednesday (by me).

Snow might delay some flights over the Christmas break.
Some flights might be delayed over the Christmas break (by snow).

He must have eaten his lunch.
His lunch must have been eaten (by him).  

       The basic meaning of these sentences is the same; only the "voice" is different.  In other words, the focus changes from the subject of the active sentence to tát the object of the active sentence.

       The passive voice is used when the subject of the active sentence is:

unknown,     unimportant,     a secret,     a deception (a lie)

Exercise 1:  Change the following sentences from the active voice to tát the passive voice.

1. I am buying a book now.

2.  I buy books every quarter.

3.  We were buying books at the bookstore this morning.

4.  We bought a book at the bookstore last week.

5.  My sister will buy some books next week.

6.  My sister will be buying her books at 6:00 PM tonight.

7.  I have bought a book this morning.

8.  My mother had bought a book before she went to tát the baby shower.

9.  We will have bought many books by the time we finish our college careers.

10.  My sister is driving her xế hộp now.

11.  She drives her xế hộp every day.

12.  I was driving my xế hộp this morning.

13.  My wife drove her nài to tát the post office.

14.  My sister will be driving her xế hộp to tát Seattle next summer.

15.  My son will drive my xế hộp to tát the các buổi party.

16.  My son has driven my xế hộp many times.

17.  My brother had driven trucks for four years before I got my license.

18.  I will have driven cars for 55 years on my next birthday.

19.  I must kiểm tra my students’ homework papers.

20.  Young children should obey their parents.

21.  Children ought to tát eat healthy food.

22.  They should have seen the stop sign.

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23.  He has seen the same movie three times.

24.  We were playing with the neighbors’ dog.

25.  The new mother is nursing her baby now.