you're, not your
'You're' is a contraction of 'you are', while 'your' indicates possession.Your the best in the class.
You're the best in the class.
it's, not its
'It's' is a contraction of 'it is', while 'its' indicates possession.The dog lost it's ball.
The dog lost its ball.
they're, there, their
'They're' means 'they are', 'there' refers to a place, and 'their' shows possession.There going to bring they’re books.
They're going to bring their books.