ain't=am not=is not=are not=have not=has not
'cause=because
wanna=want to
gonna=going to
gotta=got to
outta=out of
cuppa=cup of
piecer=piece of
woudja=would you
whadja=what did you
didja=did you
x'cuse me=excuse me
还有不少都是书上已经都提到过得了.
let's=let us
o'clock=of the clock
what's =what is
you're=you are
he's=he is
we'll=we will
that'll=that will
等等