I'd be boxing you'd be boxing she'd be boxing we'd be boxing you'd be boxing they'd be boxing
Perfect
I should've boxed you should've boxed she should've boxed we should've boxed you should've boxed they should've boxed
V-ing perfect
I should've been boxing you should've been boxing she should've been boxing we should've been boxing you should've been boxing they should've been boxing
Negation
Simple form
I shouldn't box you shouldn't box she shouldn't box we shouldn't box you shouldn't box they shouldn't box
V-ing form
I shouldn't be boxing you shouldn't be boxing she shouldn't be boxing we shouldn't be boxing you shouldn't be boxing they shouldn't be boxing
Perfect
I shouldn't have boxed you shouldn't have boxed she shouldn't have boxed we shouldn't have boxed you shouldn't have boxed they shouldn't have boxed
V-ing perfect
I shouldn't have been boxing you shouldn't have been boxing she shouldn't have been boxing we shouldn't have been boxing you shouldn't have been boxing they shouldn't have been boxing
Interrogative form
Simple form
should I box? should you box? should she box? should we box? should you box? should they box?
V-ing form
should I be boxing? should you be boxing? should she be boxing? should we be boxing? should you be boxing? should they be boxing?
Perfect
should I have boxed? should you have boxed? should she have boxed? should we have boxed? should you have boxed? should they have boxed?
V-ing perfect
should I have been boxing? should you have been boxing? should she have been boxing? should we have been boxing? should you have been boxing? should they have been boxing?
Interro-negative form
Simple form
shouldn't I box? shouldn't you box? shouldn't she box? shouldn't we box? shouldn't you box? shouldn't they box?
V-ing form
shouldn't I be boxing? shouldn't you be boxing? shouldn't she be boxing? shouldn't we be boxing? shouldn't you be boxing? shouldn't they be boxing?
Perfect
shouldn't I have boxed? shouldn't you have boxed? shouldn't she have boxed? shouldn't we have boxed? shouldn't you have boxed? shouldn't they have boxed?
V-ing perfect
shouldn't I have been boxing? shouldn't you have been boxing? shouldn't she have been boxing? shouldn't we have been boxing? shouldn't you have been boxing? shouldn't they have been boxing?