They and are make up they're
It is
Would've is would have
'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
It will.
You are.
It is
"Weren't" is a contraction. It is composed of the words "were" and "not".
"Let us" combine to form the contraction "let's".
"Shan't" is a contraction of "shall not".
Won't is a contraction of will not.
'I' and 'HAVE'
The two words that make up the contraction let's are let and us.
Haven't is the contraction of have not.
contraction made from the two words you will: you'll
Would've is would have