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