English verb conjugation
CAN WHIRR

Regular verb: whirr - whirred - whirred

Affirmation

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