What Do They Have in Common?
Common Relative Pronouns
Are They Interchangeable?
Depending on the type of relative clause, each one of them has its own uses. But as you will see later in this article, they can be interchangeable in some cases, and not in some. Here, we will focus on three relative pronouns: 'who', 'whom', and 'that'.
'Who' is a relative pronoun used as a subject to refer to people. 'That' is a relative pronoun used as a subject and object for things or groups. When used as an object, 'who' becomes 'whom.'
Whom is a relative pronoun that is used as the object of a relative clause.
'Whom' Is Not Very Common
'Whom' Is Very Formal
In everyday English, it is more natural to use 'who' instead of 'whom' at the beginning of a question, then put the preposition at the end of the sentence.
In Essential Relative Clauses, Are They Interchangeable?
In essential relative clauses, you can either use 'who' or 'that' or 'whom', or leave out the pronoun completely.
The people (
In Non-Essential Relative Clauses, Are They Interchangeable?
In non-essential relative clauses, you can use 'who' or 'whom', but you cannot use 'that'. Also you cannot leave out the pronoun.
The relative pronoun 'that' is very flexible, and you can use it for people or things. Both these sentences are correct:
I like girls
I like girls