English verb conjugation
SHOULD WHIFFLE

Regular verb: whiffle - whiffled - whiffled

Affirmation

Simple form	V-ing form
I'd whiffle you'd whiffle he'd whiffle we'd whiffle you'd whiffle they'd whiffle	I'd be whiffling you'd be whiffling he'd be whiffling we'd be whiffling you'd be whiffling they'd be whiffling
Perfect	V-ing perfect
I should've whiffled you should've whiffled he should've whiffled we should've whiffled you should've whiffled they should've whiffled	I should've been whiffling you should've been whiffling he should've been whiffling we should've been whiffling you should've been whiffling they should've been whiffling

Negation

Simple form	V-ing form
I shouldn't whiffle you shouldn't whiffle he shouldn't whiffle we shouldn't whiffle you shouldn't whiffle they shouldn't whiffle	I shouldn't be whiffling you shouldn't be whiffling he shouldn't be whiffling we shouldn't be whiffling you shouldn't be whiffling they shouldn't be whiffling
Perfect	V-ing perfect
I shouldn't have whiffled you shouldn't have whiffled he shouldn't have whiffled we shouldn't have whiffled you shouldn't have whiffled they shouldn't have whiffled	I shouldn't have been whiffling you shouldn't have been whiffling he shouldn't have been whiffling we shouldn't have been whiffling you shouldn't have been whiffling they shouldn't have been whiffling

Interrogative form

Simple form	V-ing form
should I whiffle? should you whiffle? should he whiffle? should we whiffle? should you whiffle? should they whiffle?	should I be whiffling? should you be whiffling? should he be whiffling? should we be whiffling? should you be whiffling? should they be whiffling?
Perfect	V-ing perfect
should I have whiffled? should you have whiffled? should he have whiffled? should we have whiffled? should you have whiffled? should they have whiffled?	should I have been whiffling? should you have been whiffling? should he have been whiffling? should we have been whiffling? should you have been whiffling? should they have been whiffling?

Interro-negative form

Simple form	V-ing form
shouldn't I whiffle? shouldn't you whiffle? shouldn't he whiffle? shouldn't we whiffle? shouldn't you whiffle? shouldn't they whiffle?	shouldn't I be whiffling? shouldn't you be whiffling? shouldn't he be whiffling? shouldn't we be whiffling? shouldn't you be whiffling? shouldn't they be whiffling?
Perfect	V-ing perfect
shouldn't I have whiffled? shouldn't you have whiffled? shouldn't he have whiffled? shouldn't we have whiffled? shouldn't you have whiffled? shouldn't they have whiffled?	shouldn't I have been whiffling? shouldn't you have been whiffling? shouldn't he have been whiffling? shouldn't we have been whiffling? shouldn't you have been whiffling? shouldn't they have been whiffling?