Correct Use of Interrogative Pronouns

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Interrogative pronouns are used for asking questions. Examples are: who, what, whose and which.

The interrogative pronoun who has different forms for different cases: who (subject form), whom (object form), whose (possessive form). What and which remain unchanged in all cases.

The interrogative pronouns what and which can also be used as interrogative adjectives. They are then followed by the nouns which they qualify.

Correct use of interrogative pronouns


Who is used only for persons.


Which is used for both persons and things.


What is used only of things.

Distinction between 'What is he?' and 'Who is he?'

The question 'What is he?' refers to a man's profession, whereas the question 'Who is he?' refers to a man's name.

See Also

Infinitives: forms
Infinitives without to
Infinitive with its own subject
For-structures after adjectives
For-structures after verbs
For-structures: other uses
Infinitive clauses of purpose
Verbs that can be followed by infinitives
Adjectives that can be followed by infinitives
Nouns that can be followed by infinitives

See Also

Exclamations exercise
Exclamations: common errors
Common mistakes with pronouns - Part 2
Common errors with adjectives - part 1
Common errors with adjectives - part 2

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