Homophones

They're should be used when saying they are because the apostrophe is to show the letter is missing for contracting they and are together.

Their should be used when saying a possession.

There is used for referring a place.


2 examples for each homophone

There
Over there is a concrete wall.
There is a shop around the corner.

They're
They're going to the pools.
They're going not you.

Their
It's their couch.
DON'T TOUCH IT!! It's their chocolate.