It's actually three: "of the clock."
It is
They and are make up they're
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 will.
You are.
It is
"Weren't" is a contraction. It is composed of the words "were" and "not".
"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.
They and are make up they're
Haven't is the contraction of have not.
contraction made from the two words you will: you'll
Would've is would have