I'd be cross-checking you'd be cross-checking she'd be cross-checking we'd be cross-checking you'd be cross-checking they'd be cross-checking
Perfect
I should've cross-checked you should've cross-checked she should've cross-checked we should've cross-checked you should've cross-checked they should've cross-checked
V-ing perfect
I should've been cross-checking you should've been cross-checking she should've been cross-checking we should've been cross-checking you should've been cross-checking they should've been cross-checking
Negation
Simple form
I shouldn't cross-check you shouldn't cross-check she shouldn't cross-check we shouldn't cross-check you shouldn't cross-check they shouldn't cross-check
V-ing form
I shouldn't be cross-checking you shouldn't be cross-checking she shouldn't be cross-checking we shouldn't be cross-checking you shouldn't be cross-checking they shouldn't be cross-checking
Perfect
I shouldn't have cross-checked you shouldn't have cross-checked she shouldn't have cross-checked we shouldn't have cross-checked you shouldn't have cross-checked they shouldn't have cross-checked
V-ing perfect
I shouldn't have been cross-checking you shouldn't have been cross-checking she shouldn't have been cross-checking we shouldn't have been cross-checking you shouldn't have been cross-checking they shouldn't have been cross-checking
Interrogative form
Simple form
should I cross-check? should you cross-check? should she cross-check? should we cross-check? should you cross-check? should they cross-check?
V-ing form
should I be cross-checking? should you be cross-checking? should she be cross-checking? should we be cross-checking? should you be cross-checking? should they be cross-checking?
Perfect
should I have cross-checked? should you have cross-checked? should she have cross-checked? should we have cross-checked? should you have cross-checked? should they have cross-checked?
V-ing perfect
should I have been cross-checking? should you have been cross-checking? should she have been cross-checking? should we have been cross-checking? should you have been cross-checking? should they have been cross-checking?
Interro-negative form
Simple form
shouldn't I cross-check? shouldn't you cross-check? shouldn't she cross-check? shouldn't we cross-check? shouldn't you cross-check? shouldn't they cross-check?
V-ing form
shouldn't I be cross-checking? shouldn't you be cross-checking? shouldn't she be cross-checking? shouldn't we be cross-checking? shouldn't you be cross-checking? shouldn't they be cross-checking?
Perfect
shouldn't I have cross-checked? shouldn't you have cross-checked? shouldn't she have cross-checked? shouldn't we have cross-checked? shouldn't you have cross-checked? shouldn't they have cross-checked?
V-ing perfect
shouldn't I have been cross-checking? shouldn't you have been cross-checking? shouldn't she have been cross-checking? shouldn't we have been cross-checking? shouldn't you have been cross-checking? shouldn't they have been cross-checking?