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