Relative Clauses

1. Defining relative clauses

1.1. explain which person or thing you are talking about

1.2. I met the woman who lives next door.

1.3. a kind of qualifier

1.4. never isolated by comma

1.5. defining relative clauses can be used after some pronouns

1.5.1. In theory anyone who lives or works in the area may be sick

1.5.2. they are used after indefinite pronous such as "someone", "anyone",

2. Non-defining clauses

2.1. give further infromation which is not needed to identify the person, thing or group

2.2. I saw Kylie Monogue, who was staying at the hotel opposite

2.3. mainly used in writing rather than speech

2.4. usually isolated by commas

3. relative pronous

3.1. that, which, who, whom, whose