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