English verb conjugation
SHOULD OPPUGN

Regular verb: oppugn - oppugned - oppugned

Affirmation

Simple form	V-ing form
I'd oppugn you'd oppugn he'd oppugn we'd oppugn you'd oppugn they'd oppugn	I'd be oppugning you'd be oppugning he'd be oppugning we'd be oppugning you'd be oppugning they'd be oppugning
Perfect	V-ing perfect
I should've oppugned you should've oppugned he should've oppugned we should've oppugned you should've oppugned they should've oppugned	I should've been oppugning you should've been oppugning he should've been oppugning we should've been oppugning you should've been oppugning they should've been oppugning

Negation

Simple form	V-ing form
I shouldn't oppugn you shouldn't oppugn he shouldn't oppugn we shouldn't oppugn you shouldn't oppugn they shouldn't oppugn	I shouldn't be oppugning you shouldn't be oppugning he shouldn't be oppugning we shouldn't be oppugning you shouldn't be oppugning they shouldn't be oppugning
Perfect	V-ing perfect
I shouldn't have oppugned you shouldn't have oppugned he shouldn't have oppugned we shouldn't have oppugned you shouldn't have oppugned they shouldn't have oppugned	I shouldn't have been oppugning you shouldn't have been oppugning he shouldn't have been oppugning we shouldn't have been oppugning you shouldn't have been oppugning they shouldn't have been oppugning

Interrogative form

Simple form	V-ing form
should I oppugn? should you oppugn? should he oppugn? should we oppugn? should you oppugn? should they oppugn?	should I be oppugning? should you be oppugning? should he be oppugning? should we be oppugning? should you be oppugning? should they be oppugning?
Perfect	V-ing perfect
should I have oppugned? should you have oppugned? should he have oppugned? should we have oppugned? should you have oppugned? should they have oppugned?	should I have been oppugning? should you have been oppugning? should he have been oppugning? should we have been oppugning? should you have been oppugning? should they have been oppugning?

Interro-negative form

Simple form	V-ing form
shouldn't I oppugn? shouldn't you oppugn? shouldn't he oppugn? shouldn't we oppugn? shouldn't you oppugn? shouldn't they oppugn?	shouldn't I be oppugning? shouldn't you be oppugning? shouldn't he be oppugning? shouldn't we be oppugning? shouldn't you be oppugning? shouldn't they be oppugning?
Perfect	V-ing perfect
shouldn't I have oppugned? shouldn't you have oppugned? shouldn't he have oppugned? shouldn't we have oppugned? shouldn't you have oppugned? shouldn't they have oppugned?	shouldn't I have been oppugning? shouldn't you have been oppugning? shouldn't he have been oppugning? shouldn't we have been oppugning? shouldn't you have been oppugning? shouldn't they have been oppugning?