Let’s look at there and its usages and common phrases and see how we can remember it

there – Where are they? Over there!
There’s the cinema over there.
We can use it with There is / there was
plural version – there are/ there were

We have phrases such as:
Been there done that!
There and then.
There you go!
There you have it!

Let’s look at a strategy to help you see if you’re using the right word:

Look at the word. Can you see a word within the word that means place just like there?

There’s an here in there – here there where nowhere everywhere

So there you have it there – here, where

Let’s look at they’re

they’re is a contraction /short form of they are

They’re happy. They’re Australian. They’re nurses. They’re not New Zealanders

The strategy you need to use to see if you’re using the right one is to read back your sentences and read they’re in the long form as they are and see if it fits.

Is this sentence correct?
They’re nurses over they’re. (Read it back using the full “they are”)
They are nurses over they are. x Oops! The first is right second not.

They’re nurse over their. What’s wrong with this sentence?
They’re nurses over there. √

Let’s look at their which is used for possession and belonging to.

my house, your, house, his house, her house, our house – their house

Their country is in turmoil at the moment.
They have a problem with their house.

The memory trick I use is around the i i = my so my house or their house
It’s not my house it’s their house.