[Image credit: Stuart Miles]

Here’s another one for the road, short and sweet:

There is an eyelash stuck in my eye.  Here the writer is explaining where an object (my eyelash) is located: there.
Their plans are coming together for the trip.  This is a possessive pronoun meaning his plans, her plans or belonging to both.
They’re going shelling on the beach.  In this case, we’re using the shortened version of they are.

These words are not interchangeable.  But if you remember: where equals there, their is spelled with an “i” (possessive) and they’re is short for they are, you should be good to go.

Do you have an easier way to remember the proper use of there, their and they’re?

*Grammar Nazi image borrowed from funkyjunk.com