Relative Clauses
We use relative clauses to give more information about a person, thing, place, time, reason or possession. They usually come directly after the noun they describe.
Relative clauses often begin with words such as who, which, that, whose, where, when or why.
- The woman who lives next door is my aunt.
- The book that I bought is very interesting.
- This is the town where I grew up.
- 1999 was the year when I was born.
- That's the reason why I left.
- He's the man whose daughter works here.
The relative word connects the noun to the information that follows it. The choice depends on what we are referring to and the role of the word in the clause.
Prepositions with relative pronouns
A relative pronoun can also come after a preposition. This structure is especially common in more formal English.
- This is the house in which I grew up.
- The company for which she works is based in London.
- The chair on which he was sitting was broken.
When we refer to people, we normally use whom after a preposition in formal English:
- The man with whom I travelled was very friendly.
- The woman to whom I spoke was the manager.
In everyday English, we usually put the preposition at the end of the relative clause and use who instead:
- The man who I travelled with was very friendly.
- The woman who I spoke to was the manager.
Which referring to a whole clause
Which does not always refer to a single noun. It can also refer to a whole situation, action or idea mentioned before it. When which refers to the whole previous clause, we put a comma before it.
- He forgot my birthday, which makes me sad. = The fact that he forgot my birthday makes me sad.
- She passed all her exams, which surprised everyone. = The fact that she passed all her exams surprised everyone.
- They cancelled the flight, which caused a lot of problems. = The cancellation of the flight caused a lot of problems.
In these examples, which refers to the whole previous clause, not just to the noun immediately before it.
Commas in relative clauses
Relative clauses can be either defining or non-defining. This determines whether we use commas.
A defining relative clause tells us which particular person or thing we mean. The information is necessary to identify the person or thing, so we do not use commas.
- The students who passed the exam can leave. = Only the students who passed the exam can leave.
- The book that I bought yesterday is very interesting. = The relative clause identifies which book we mean.
- People who exercise regularly often feel better.
A non-defining relative clause gives only extra information. We already know which person or thing we mean without this information, so the relative clause is separated by commas.
- My sister, who lives in London, is a doctor. = We already know who we are talking about; living in London is extra information.
- Paris, which is the capital of France, attracts millions of tourists.
- Mr Brown, who teaches us English, is absent today.
If a non-defining relative clause comes in the middle of a sentence, we put a comma before and after it. If it comes at the end of the sentence, we only need a comma before it.
- My brother, who works in Germany, is coming home tomorrow.
- I spoke to Anna, who works in Germany.
We normally do not use that in non-defining relative clauses. We use words such as who or which instead.
- My car, which is ten years old, still works perfectly.
Shortened relative clauses
In some cases, relative clauses can also be shortened:
- The woman sitting by the window is my aunt.
- The goods made in this factory are exported.