English verb conjugation
CAN WHIFFLE

Regular verb: whiffle - whiffled - whiffled

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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