This user understands the difference between your and you're. So should you.
’s
This user realises that plural nouns should not have an apostrophe while possessive words should!
’s
Thi's user know's that not every word that end's with s need's an apostrophe and will remove misused apostrophe's from Wikipedia with extreme prejudice.
its & it's
This user understands the difference between its and it's. So should you.
their there they're
This user thinks that there are too many people who don’t know that they're worse than their own children at spelling!
lie & lay
This user understands the difference between lie and lay. So should you.