can whirr
Regular verb: whirr - whirred- whirred

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can whirr
you can whirr
he can whirr
we can whirr
you can whirr
they can whirr 	I can be whirring
you can be whirring
he can be whirring
we can be whirring
you can be whirring
they can be whirring	I can have whirred
you can have whirred
he can have whirred
we can have whirred
you can have whirred
they can have whirred	I can have been whirring
you can have been whirring
he can have been whirring
we can have been whirring
you can have been whirring
they can have been whirring	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't whirr
you can't whirr
he can't whirr
we can't whirr
you can't whirr
they can't whirr 	I can't be whirring
you can't be whirring
he can't be whirring
we can't be whirring
you can't be whirring
they can't be whirring	I can't have whirred
you can't have whirred
he can't have whirred
we can't have whirred
you can't have whirred
they can't have whirred	I can't have been whirring
you can't have been whirring
he can't have been whirring
we can't have been whirring
you can't have been whirring
they can't have been whirring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I whirr?
can you whirr?
can he whirr?
can we whirr?
can you whirr?
can they whirr? 	can I be whirring?
can you be whirring?
can he be whirring?
can we be whirring?
can you be whirring?
can they be whirring? 	can I have whirred?
can you have whirred?
can he have whirred?
can we have whirred?
can you have whirred?
can they have whirred? 	can I have been whirring?
can you have been whirring?
can he have been whirring?
can we have been whirring?
can you have been whirring?
can they have been whirring? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I whirr?
can't you whirr?
can't he whirr?
can't we whirr?
can't you whirr?
can't they whirr? 	can't I be whirring?
can't you be whirring?
can't he be whirring?
can't we be whirring?
can't you be whirring?
can't they be whirring? 	can't I have whirred?
can't you have whirred?
can't he have whirred?
can't we have whirred?
can't you have whirred?
can't they have whirred? 	can't I have been whirring?
can't you have been whirring?
can't he have been whirring?
can't we have been whirring?
can't you have been whirring?
can't they have been whirring?