English verb conjugation
SHOULD GROUP

Regular verb: group - grouped - grouped

Affirmation

Simple form	V-ing form
I'd group you'd group he'd group we'd group you'd group they'd group	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	V-ing 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	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	V-ing 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	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	V-ing 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	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	V-ing form
should I group? should you group? should he group? should we group? should you group? should they group?	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	V-ing 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?	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	V-ing 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?	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	V-ing 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?	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?