Learn English – Passive voice of intransitive verbs

passive-voiceprepositionstransitivity

Intransitive verbs have no objects, so they can not be used in passive voice, but I have seen many people using intransitive verbs in passive voice sentences. I am much confused how is it possible.
The words "listen", "laugh", "work" and "look" etc. are intransitive verbs, but why are they used in passive sentences with preposition "to", "at" and "on" etc.?
He laughed at me [I was laughed at by him]
I worked on the computer [The computer was worked on by me]
I listened to him [He was listened to by me]
I looked at him [He was looked at by me]

The important point which I want to ask is that;
When intransitive verbs are used with prepositions (laugh at, listen to, work on etc…), are they considered as transitive verbs?

Best Answer

This is not as complicated as it seems.

What you are looking at here is called a Prepositional Passive (PP or P-passive), which is sometimes referred to as a pseudo-passive. In this form, the complement of a preposition is realised as the subject of a passivised verb, as in your examples.

In

He laughed at me ~ I was laughed at (by him)

The complement of the preposition phrase at me becomes the subject I - which is why it changes - of the passivised verb (was) laughed.

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