LEARN ENGLISH: They're/Their/There
If what you are trying to say "they are" then what you want is "they're". The apostrophe acts to make the two words into a single contraction.
(They're not here. [is equivilant to] They are not here.)
If you are trying to express posession, then the word is "their". It's just like "her" or "our".
(Look at the smiles on their faces.)
There, however, can never be used for either of those. "There" is often used to express location, but is generally for anything that isn't one of the two others.
(There goes a bird.)
(There is a bird over there.)
Now mixing them:
(They're not going to be there.)
(Their dogs are over there.)
(They're not fond of driving while speaking on their cellphones.)
FIGURE IT OUT PEOPLE!
Poor spelling is expected, but this isn't a case of not knowing how to spell something, it's not understanding the fundamental meaning of the words you are using.
[/rant]
