Relative Clauses - Perfect English Grammar
Defining relative clauses: 1: The relative pronoun is the subject: First, let's consider when the relative pronoun is the subject of a defining relative clause. We can use 'who', 'which' or 'that'. We use 'who' for people and 'which' for things. We can use 'that' for people or things. The relative clause can come after the subject or the object of the sentence. We can't drop the relative pronoun.