I and have make "i've".
will not
He'll
Need and not
I + will = I'll
The two words that make up the contraction "can't" are "cannot."
"who" and "will" make up the contraction "who'll."
It will.
They will.
"You" and "would" make up the contraction "you'd".
"you" and "would" make up the contraction "you'd."
Should've is a contraction of the words shouldand have.
you and would.