English verb conjugation
SHOULD PRESUPPOSE

Regular verb: presuppose - presupposed - presupposed

Affirmation

Simple form	V-ing form
I'd presuppose you'd presuppose he'd presuppose we'd presuppose you'd presuppose they'd presuppose	I'd be presupposing you'd be presupposing he'd be presupposing we'd be presupposing you'd be presupposing they'd be presupposing
Perfect	V-ing perfect
I should've presupposed you should've presupposed he should've presupposed we should've presupposed you should've presupposed they should've presupposed	I should've been presupposing you should've been presupposing he should've been presupposing we should've been presupposing you should've been presupposing they should've been presupposing

Negation

Simple form	V-ing form
I shouldn't presuppose you shouldn't presuppose he shouldn't presuppose we shouldn't presuppose you shouldn't presuppose they shouldn't presuppose	I shouldn't be presupposing you shouldn't be presupposing he shouldn't be presupposing we shouldn't be presupposing you shouldn't be presupposing they shouldn't be presupposing
Perfect	V-ing perfect
I shouldn't have presupposed you shouldn't have presupposed he shouldn't have presupposed we shouldn't have presupposed you shouldn't have presupposed they shouldn't have presupposed	I shouldn't have been presupposing you shouldn't have been presupposing he shouldn't have been presupposing we shouldn't have been presupposing you shouldn't have been presupposing they shouldn't have been presupposing

Interrogative form

Simple form	V-ing form
should I presuppose? should you presuppose? should he presuppose? should we presuppose? should you presuppose? should they presuppose?	should I be presupposing? should you be presupposing? should he be presupposing? should we be presupposing? should you be presupposing? should they be presupposing?
Perfect	V-ing perfect
should I have presupposed? should you have presupposed? should he have presupposed? should we have presupposed? should you have presupposed? should they have presupposed?	should I have been presupposing? should you have been presupposing? should he have been presupposing? should we have been presupposing? should you have been presupposing? should they have been presupposing?

Interro-negative form

Simple form	V-ing form
shouldn't I presuppose? shouldn't you presuppose? shouldn't he presuppose? shouldn't we presuppose? shouldn't you presuppose? shouldn't they presuppose?	shouldn't I be presupposing? shouldn't you be presupposing? shouldn't he be presupposing? shouldn't we be presupposing? shouldn't you be presupposing? shouldn't they be presupposing?
Perfect	V-ing perfect
shouldn't I have presupposed? shouldn't you have presupposed? shouldn't he have presupposed? shouldn't we have presupposed? shouldn't you have presupposed? shouldn't they have presupposed?	shouldn't I have been presupposing? shouldn't you have been presupposing? shouldn't he have been presupposing? shouldn't we have been presupposing? shouldn't you have been presupposing? shouldn't they have been presupposing?