I'd be shortening you'd be shortening he'd be shortening we'd be shortening you'd be shortening they'd be shortening
Perfect
I should've shortened you should've shortened he should've shortened we should've shortened you should've shortened they should've shortened
V-ing perfect
I should've been shortening you should've been shortening he should've been shortening we should've been shortening you should've been shortening they should've been shortening
Negation
Simple form
I shouldn't shorten you shouldn't shorten he shouldn't shorten we shouldn't shorten you shouldn't shorten they shouldn't shorten
V-ing form
I shouldn't be shortening you shouldn't be shortening he shouldn't be shortening we shouldn't be shortening you shouldn't be shortening they shouldn't be shortening
Perfect
I shouldn't have shortened you shouldn't have shortened he shouldn't have shortened we shouldn't have shortened you shouldn't have shortened they shouldn't have shortened
V-ing perfect
I shouldn't have been shortening you shouldn't have been shortening he shouldn't have been shortening we shouldn't have been shortening you shouldn't have been shortening they shouldn't have been shortening
Interrogative form
Simple form
should I shorten? should you shorten? should he shorten? should we shorten? should you shorten? should they shorten?
V-ing form
should I be shortening? should you be shortening? should he be shortening? should we be shortening? should you be shortening? should they be shortening?
Perfect
should I have shortened? should you have shortened? should he have shortened? should we have shortened? should you have shortened? should they have shortened?
V-ing perfect
should I have been shortening? should you have been shortening? should he have been shortening? should we have been shortening? should you have been shortening? should they have been shortening?
Interro-negative form
Simple form
shouldn't I shorten? shouldn't you shorten? shouldn't he shorten? shouldn't we shorten? shouldn't you shorten? shouldn't they shorten?
V-ing form
shouldn't I be shortening? shouldn't you be shortening? shouldn't he be shortening? shouldn't we be shortening? shouldn't you be shortening? shouldn't they be shortening?
Perfect
shouldn't I have shortened? shouldn't you have shortened? shouldn't he have shortened? shouldn't we have shortened? shouldn't you have shortened? shouldn't they have shortened?
V-ing perfect
shouldn't I have been shortening? shouldn't you have been shortening? shouldn't he have been shortening? shouldn't we have been shortening? shouldn't you have been shortening? shouldn't they have been shortening?