I'd be collapsing you'd be collapsing she'd be collapsing we'd be collapsing you'd be collapsing they'd be collapsing
Perfect
I should've collapsed you should've collapsed she 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 she 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 she 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 she 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 she 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 she 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 she collapse? should we collapse? should you collapse? should they collapse?
V-ing form
should I be collapsing? should you be collapsing? should she be collapsing? should we be collapsing? should you be collapsing? should they be collapsing?
Perfect
should I have collapsed? should you have collapsed? should she 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 she 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 she 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 she 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 she 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 she have been collapsing? shouldn't we have been collapsing? shouldn't you have been collapsing? shouldn't they have been collapsing?