These words have the same pronunciation when they are spoken, Their, They're, and There in English.
There
There is used to express the location of something not near you.
Examples:
That is a nice car over there.
I will sleep at home when I arrive there.
You will be very tired when you get there.
There is also used to show that something exist. Use the form:
Examples:
There is a beach near my house.
There is a store near you.
There are donuts to eat.
Their
Their is used to show possession that something belongs to someone. Their is always placed before the object.
Examples:
Their movie tickets are on the table.
All of their books are brand new.
The snakes protected their eggs with care.
They're
They're is a contraction of "they are".
Examples:
They're very nice people.
They're playing at the park.
They're very hungry.