Relative clause

We can use relative clauses to make two sentences into one sentence. The relative clause gives us more information about the person or thing in the main clause. We introduce a relative clause with a relative pronoun (which, who or that). ‘Which’ is for a relative clause about animals or things (but NOT people). In the test sentence ‘which’ = the subject of ‘was founded’. It replaces the noun ‘Washington’ in the sentence. We need the relative pronoun when it is a subject, therefore, we cannot leave out the relative pronoun when it is a subject. Defining relative clauses describe exactly which (or what kind) person or thing we mean. In the test example: which city?