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