Active and Passive Voice (Perfect tense & modals)

1. When we change a sentence in

the present perfect tense, the past perfect tense or the future perfect tense

from the active voice to the passive voice,

 we have to change the verb in these ways:

a)

present perfect:      

has/have + been + past participle of verb

Example:

Active:      He has encouraged the children to improve their reading speed.

Passive:    The children have been encouraged to improve their reading speed.

b)

Past perfect:   

 had + been + past participle of verb

Example:

Active:      Tim’s friend Eddy had told Mrs Lang about Tim’s arrival before I called her.

Passive:    Mrs Lang had been told about Tim’s arrival by his friend Eddy before I called her.

c)

Future perfect:

will have + been + past participle of verb

Example:

Active:      By Monday next week, our teachers will have marked all our answer scripts.

Passive:    By Monday next week, all our answer scripts will have been marked. 

2. When we change a sentence with modals such as

can, may or must from the active voice to the passive voice,

we have to change the verb in these ways:

can + be + past participle of verb

may + be + past participle of verb

must + be + past participle of verb

Example:

The price of the house can be estimated by the company.

This problem may be discussed by the committee soon.

The sport equipment room must be locked (by the boys) after the games.

 

P 106

6 Comments »

  1. christina said

    thank you for your info. it helps
    a lot to me!!!!!

  2. Preethi said

    hey can u tell me about futre perfect continuous and future continuous

    • Uncle Teng said

      I have noted your request about the future perfect continuous tense.
      I will be writing an article on it later.
      In the the meantime you can browse my column on Future Continuous tense.
      Happy surfing

  3. moniha sri said

    that was an really good example

RSS feed for comments on this post · TrackBack URI

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: