No, shouldn't is a contraction, a shortened form for 'should not' a verb and the adverb not. The contraction shouldn't functions as a verb (or auxiliary verb) in a sentence.
Example:
You should not be late for school. or You shouldn't be late for school.
i shouldnt have to answer this -.-
no it shouldnt cost u , as long as ur not roaming then it shouldnt cost u a penny :)
you shouldnt
It can block your intestines.
you shouldnt.
Well U shouldnt be
We shouldnt
No you shouldnt
no they shouldnt
your stupid you shouldnt do that
something you shouldnt watch
You shouldnt hve done that...