they

they [ ðeı ] pronoun ***

They is used as the subject of a verb:

They killed him.

In formal English they can also be used after the verb to be, especially before a relative clause:

It is they who are telling lies.

1. ) used for referring to a group of people or things that have already been mentioned or that are already known about:

I called her parents because I knew they were worried.

It's hard to choose. They're all very nice.

2. ) used instead of he or she, especially when you are referring back to a word such as everyone, someone, or anyone :

We should give everyone a chance to say what they think.

3. ) used for referring to people in general:

they say/call/think etc.: They used to call her the Iron Lady.

4. ) used for referring to a government, an organization, or a group of people in authority:

They're going to ban logging in the region.

=> HE, THEM