they

"They" is used to talk about two or more people, not you or the person you are speaking to.

Example: I love Josie and Reg. They are nice people.

"They" is used to talk about two or more things.

Example: Can you get the books for me? They're over there.

"They" is used to talk about one or more person when you don't know the sex or number.

Example: If a person is fast, they can get there early.

"They" is used to talk about people in general.

Example: When are they going to finish that new building?

"They" is used to talk about a person that is not a man and not a woman.

Example: I love Alex. They are my partner.