Passive Voice for May have, Should have, Must have and Might have

Passive Voice for May have, Should have, Must have and Might have.
In Passive voice sentences, The Subject and Object will cross (interchange) their places, and the word "By" will be fixed right after the past participle ( the Third form of the verb) & before the subject.
The Following are some of the major and commonly used Past Modals and their Passive voice.

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Passive Voice for May have:

May have will change into 'May have been' in the passive voice.

For Example:

Active voice: we may have satisfied all the new customers.

Passive voice: All the new customers may have been satisfied by us.

Active voice [Negative sentence]: we may not have satisfied all the new customers.

Passive voice [negative sentence]: All the new customers may not have been satisfied by us.

Passive Voice for Should have:

'Should have' will change into 'should have been' in the passive voice.

For example:

Active voice: They should have fulfilled all the dreams.

Passive voice: All the dreams should have been fulfilled by them.

Active Voice [Negative sentence]: They should not have fulfilled all the dreams.

Passive voice [negative sentence]: All of the dreams should not have been fulfilled by them.

Passive voice for must have:

The 'must have' will change into 'Must have been' in the passive voice.

For Example:

Active voice: Smith must have started a new side Business.

Passive voice: A new side business must have been started by smith.

Active voice [negative sentence]: Smith must not have started a new side business.

Passive voice [negative sentence]: A new side business must not have been started by smith.

Passive voice for might have:

The 'Might have' will convert into 'might have been' in the passive voice phrases.

For Example:

Active voice: The girls might have learned the passive voice for past modals.

Passive voice: The passive voice for past modals might have been learned by the girls.

Active voice [negative sentence]: The girls might not have learned the passive voice for past modals.

Passive voice [negative sentence]" The passive voice for past modals might not have been learned by the girls.