you are =you're
he is =he's
she is=she's
it is =it's
They are =they're
they were=they'er
we are=we're
we were=we'er
I would=I'd
you would=you'd
He had=He'd
I have=I've
He has=He's
must not =mustn't
need not=needn't
should not=shouldn't
would not =wouldn't
She will=She'll望采纳，谢谢^ω^