It + (whatever) shortened It's
****If you say something like, Its/It’s a small world (when you are talking with someone and you found out that they knew somebody that you know). You can use It's = It is a small world. But can you also use it to shorten It has or it was or anything else that if you take the other letters off it would be It's? If not, why not? And when does it have to go by itself?
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