I'd be extemporising you'd be extemporising he'd be extemporising we'd be extemporising you'd be extemporising they'd be extemporising
Perfect
I should've extemporised you should've extemporised he should've extemporised we should've extemporised you should've extemporised they should've extemporised
V-ing perfect
I should've been extemporising you should've been extemporising he should've been extemporising we should've been extemporising you should've been extemporising they should've been extemporising
Negation
Simple form
I shouldn't extemporise you shouldn't extemporise he shouldn't extemporise we shouldn't extemporise you shouldn't extemporise they shouldn't extemporise
V-ing form
I shouldn't be extemporising you shouldn't be extemporising he shouldn't be extemporising we shouldn't be extemporising you shouldn't be extemporising they shouldn't be extemporising
Perfect
I shouldn't have extemporised you shouldn't have extemporised he shouldn't have extemporised we shouldn't have extemporised you shouldn't have extemporised they shouldn't have extemporised
V-ing perfect
I shouldn't have been extemporising you shouldn't have been extemporising he shouldn't have been extemporising we shouldn't have been extemporising you shouldn't have been extemporising they shouldn't have been extemporising
Interrogative form
Simple form
should I extemporise? should you extemporise? should he extemporise? should we extemporise? should you extemporise? should they extemporise?
V-ing form
should I be extemporising? should you be extemporising? should he be extemporising? should we be extemporising? should you be extemporising? should they be extemporising?
Perfect
should I have extemporised? should you have extemporised? should he have extemporised? should we have extemporised? should you have extemporised? should they have extemporised?
V-ing perfect
should I have been extemporising? should you have been extemporising? should he have been extemporising? should we have been extemporising? should you have been extemporising? should they have been extemporising?
Interro-negative form
Simple form
shouldn't I extemporise? shouldn't you extemporise? shouldn't he extemporise? shouldn't we extemporise? shouldn't you extemporise? shouldn't they extemporise?
V-ing form
shouldn't I be extemporising? shouldn't you be extemporising? shouldn't he be extemporising? shouldn't we be extemporising? shouldn't you be extemporising? shouldn't they be extemporising?
Perfect
shouldn't I have extemporised? shouldn't you have extemporised? shouldn't he have extemporised? shouldn't we have extemporised? shouldn't you have extemporised? shouldn't they have extemporised?
V-ing perfect
shouldn't I have been extemporising? shouldn't you have been extemporising? shouldn't he have been extemporising? shouldn't we have been extemporising? shouldn't you have been extemporising? shouldn't they have been extemporising?