They is a word we use to talk about more than one person or thing. It replaces their names to avoid repeating them.
They are my friends from school.
They like to play outside every day.
They can be used for one person when you do not know if that person is a man or woman. It is polite and helps when we do not want to say he or she.
If someone calls, tell them I am out.
They left their bag on the table.
They is used to talk about people in general or groups who do things or have opinions, but we do not say exactly who they are.
They say rain is coming tomorrow.
They believe this is the best plan.
They can be used in fixed phrases or sayings to mean people in general who believe or say something, but it is not a specific group.
They say every cloud has a silver lining.
They told me this is true.
They is used by some people who do not identify as male or female. It replaces he or she to show respect for their gender identity.
Alex likes their coffee hot; they drink it every morning.
Taylor said they will come to the meeting.
They can be used to talk about animals or things if the speaker does not know or does not want to say if they are male or female.
The dogs are hungry. They want food.
The books are new. They are on the table.
