Relative Clauses: Non-defining

Extra info set off by commas.

Examples

• My brother, who lives in Rome, is a chef.

Key rules

• They add extra information and use commas
• Use who for people and which for things
• That cannot be used
• The pronoun cannot be dropped
• Which can refer to a whole clause

Common mistakes

• My sister, that lives in Rome, is a doctor → My sister, who lives in Rome, is a doctor
• He was late, that annoyed me → He was late, which annoyed me