Louise’s witty elaboration on that-witch-which reminds me of one of my peeves about spelling mistakes that result from ignorance (or just bad spelling): they’re-there-their (there are more on my list of peeves, but they’ll have to wait).
Most people have a problem distinguishing their from there, which seems to me as easy-to-solve a problem as there is in the English language’s miasma of spelling problems.
They’re is there because THEY ARE is being contracted — as it usually is in when spoken — to THEY ‘RE by the insertion of an apostrophe (more on that little beast anon). The apostrophe replaces a SPACE between the words and the A that begins ARE (that’s why it’s called, appropriately enough, a CONTRACTION). And in this case, the contraction means that more than one person or object is placed somewhere in the space/time continuum. They are in New York. They’re in Germany. They’ve left their traces in outer space. Who? The stars in outer space.
Their and there are subject to mix-ups, I expect, mainly because of spelling or typing errors. But an easy way to distinguish them might be to see THEIR as having an I in it, signifying a person, and in this case more than one person (or thing) with one or more possessions or attributes: I like Siamese cats because their eyes are blue, and – look over there! – they don’t shed their hair all over the place.
There it is: THEY’RE THERE, LEAVING THEIR MARKS EVERYWHERE.