People

• She's the woman. She is a famous writer.

• She's the woman who is a famous writer.

Things/Animals

• That's the house. My uncle bought it in 2016.

• That's the house which my uncle bought in 2016.

Possession (people, things and animals.)

• Alice is the girl. Her dad is a teacher.

• Alice is the girl whose dad is a teacher.

​relative adverbs

​where = places

​The hotel where we stayed had a view of the Eiffel Tower.

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​why= reason

​Nobody knows the reason (why/that) she was sad. We can omit why or that. (παραλειφθεί)

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​when= time

​That was the year when/that my brother was born.

​defining and non-defining relative clauses

​Defining relative clause δίνει σημαντικές πληροφορίες, απαραίτητες για το νοημα της κύριας πρότασης. Δε μπαίνει ανάμεσα σε κόμματα και είσαγεται με το who,which, that,whose, where,when, the reason why.

​eg. The bus (which) we took broke down and we had to walk back home.

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​Non-defining clause δίνει επιπλέον πληροφορίες για το νόημα της κύριας προτασης. Μπαίνει παντα ανάμεσα σε κόμματα και εισάγεται με τα who,whom, which,whose, where and when.

​eg. Sandra, who lives next door to me, has got two cats.