你所问的缩略形式是:
Let us( ) ------Let's
I am( ) ------I'm
She is( ) ------She's
do not( ) ------don't
is not( ) ------isn't
They are( ) ------They're
Whe are( ) ------We're
Who is( ) ------Who's
You are( ) ------You're
It is( ) ------It's
are not( ) ------aren't
have not( )------haven't