Their - there - they're
From Hull AWE
Their = of them. E.g., 'Have you seen their house?.'
They're = they are. E.g., 'They're moving in today.'
There is the spelling for all other meanings of words that sound like this. E.g. 'I left it there, in that chair'; 'There are three things I want you to remember'; 'There, there, have you hurt yourself?'; 'There's no chance you can get a ticket?'
