Defining and non-defining relative clauses.

The book that I'm reading is very interesting.

• defining

• non-defining

My sister, who is a doctor, just moved to New York.

• defining

• non-defining

The Eiffel Tower, which was built in 1889, is a famous landmark in Paris.

• defining

• non-defining

The car that he bought last week is not working anymore.

• defining

• non-defining

Jane Austen, whose novels are still widely read today, lived in England during the 19th century.

• defining

• non-defining

I met the student who won the science competition.

• defining

• non-defining

Do you know the person that I was talking to on the phone?

• defining

• non-defining

Our neighbors, who are very friendly, always help us with gardening.

• defining

• non-defining

The woman who lives next door is a talented artist.

• defining

• non-defining

The concert, which was rescheduled due to bad weather, will now take place next week.

• defining

• non-defining