they · pronoun /ðeɪ/
they (GROUP)
A1 used as the subject of the verb when referring to a group of people, animals, or things that have already been talked about
Dictionary examples:
I've known the Browns for years. They're very nice people.
Where are my glasses? They were on the table just now.
Learner example:
There are a lot of shops, restaurants and disco[s]. They are open all day and all night. (Skills for Life (Entry 1); A1; Polish)
they (PERSON)
B1 used to refer to a person when you want to avoid saying "he" or "she" or when you do not know if the person is male or female
Dictionary example:
"There's someone on the phone for you." "What do they want?"
they (PEOPLE)
B2 people in general
Dictionary example:
They say that breaking a mirror brings you seven years' bad luck.
Learner example:
They say it is getting harder and harder to live without computers. But is it really true? (First Certificate in English; B2; Portuguese)