Relative clauses give more information about a person, thing, place, or time.
They begin with a relative pronoun like who, which, that, whose, where, or when.
These clauses give essential information – we need them to understand the sentence.
✅ No commas
✅ Use: who, which, that, whose, where
You can use "that" instead of "who" or "which" in defining clauses.
You can omit the relative pronoun (who, which, that) if it is the object:
✅ He’s the man (that) I met.
These add extra (non-essential) information. The sentence still makes sense without them.
✅ Use commas
❌ Don’t use "that"
❌ You can’t omit the relative pronoun
✅ Use a relative clause to add info about people, places, or things.
✅ Use who for people, which for things, where for places, whose for possession.
✅ You can use that instead of who/which in defining clauses.
✅ You can omit the pronoun if it’s the object in a defining clause.
❌ Don’t use that in non-defining clauses.
❌ Don’t leave out the relative pronoun in non-defining clauses.
✅ Always use commas in non-defining clauses.