Would've is would have
It is
They and are make up they're
'She has' are two individual words, not compound; you can make a one word contraction she's meaning she has.
The contraction "mustn't" means "must not." Must is an auxiliary verb and not is an adverb.
It's a contraction of the two words binary digit
The two words that make up the contraction "can't" are "cannot."
"who" and "will" make up the contraction "who'll."
It will.
"you" and "would" make up the contraction "you'd."
"You" and "would" make up the contraction "you'd".
It is
You are.
Does not.
will + not
"Weren't" is a contraction. It is composed of the words "were" and "not".
"Let us" combine to form the contraction "let's".
Won't is a contraction of will not.