What is an apostrophe?

It would just be it's because if you think about it, the apostrophe goes between it and has, you would just remove ha from it'has and make it it's :)

There isn't one in American English. "She's" is the contraction for "She is". If "she has" something, it is "hers."

It depends on the sentence. If it's a contraction of the words "it is" then there is an apostrophe. (See this sentence for an example) If it's to indicate possession it doesn't. (Ex: The old coat...

"Its" without an apostrophe shows possession, as in "its hair is brown." Other possessive pronouns include my, your, his, her, our, and their. "It's" with an apostrophe is always a contraction of two...

As you've written it, there's no apostrophe and is not meant o be one. But you might be asking what is the contracted form of you will, in which case the answer is you'll.