WRONG:

THEY'RE/THEIR/THERE

Many people are so spooked by apostrophes that a word like "they're" seems to them as if it might mean almost anything. In fact, it's always a contraction of "they are." If you've written "they're," ask yourself whether you can substitute "they are." If not, you've made a mistake. "Their" is a possessive pronoun like "her" or "our": "They eat their hotdogs with sauerkraut." Everything else is "there." "There goes the ball, out of the park! See it? Right there! There aren't very many home runs like that." "Thier" is a common misspelling, but you can avoid it by remembering that "they" and "their" begin with the same three letters.

List of errors