can whiffle
Regular verb: whiffle - whiffled- whiffled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
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? 	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?