A discussion about punctuation marks is like opening the Pandora`s Box. Out come the full stop (.), the comma (,), the semi colon (;), the colon (), the question mark (?), the exclamation mark (!), ...

Apostrophes are the curly floating commas in sentences that usually indicate possession or a contraction. There are a few set phrases and holidays, however, that also use apostrophes. In fact, ...