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 cannot whiffle you cannot whiffle he cannot whiffle we cannot whiffle you cannot whiffle they cannot whiffle	I cannot be whiffling you cannot be whiffling he cannot be whiffling we cannot be whiffling you cannot be whiffling they cannot be whiffling
Perfect	V-ing perfect
I cannot have whiffled you cannot have whiffled he cannot have whiffled we cannot have whiffled you cannot have whiffled they cannot have whiffled	I cannot have been whiffling you cannot have been whiffling he cannot have been whiffling we cannot have been whiffling you cannot have been whiffling they cannot 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 I not whiffle? can you not whiffle? can he not whiffle? can we not whiffle? can you not whiffle? can they not whiffle?	can I not be whiffling? can you not be whiffling? can he not be whiffling? can we not be whiffling? can you not be whiffling? can they not be whiffling?
Perfect	V-ing perfect
can I not have whiffled? can you not have whiffled? can he not have whiffled? can we not have whiffled? can you not have whiffled? can they not have whiffled?	can I not have been whiffling? can you not have been whiffling? can he not have been whiffling? can we not have been whiffling? can you not have been whiffling? can they not have been whiffling?