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