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