English verb conjugation
CAN KNOLL

Regular verb: knoll - knolled - knolled

Affirmation

Simple form	V-ing form
I can knoll you can knoll he can knoll we can knoll you can knoll they can knoll	I can be knolling you can be knolling he can be knolling we can be knolling you can be knolling they can be knolling
Perfect	V-ing perfect
I can have knolled you can have knolled he can have knolled we can have knolled you can have knolled they can have knolled	I can have been knolling you can have been knolling he can have been knolling we can have been knolling you can have been knolling they can have been knolling

Negation

Simple form	V-ing form
I can't knoll you can't knoll he can't knoll we can't knoll you can't knoll they can't knoll	I can't be knolling you can't be knolling he can't be knolling we can't be knolling you can't be knolling they can't be knolling
Perfect	V-ing perfect
I can't have knolled you can't have knolled he can't have knolled we can't have knolled you can't have knolled they can't have knolled	I can't have been knolling you can't have been knolling he can't have been knolling we can't have been knolling you can't have been knolling they can't have been knolling

Interrogative form

Simple form	V-ing form
can I knoll? can you knoll? can he knoll? can we knoll? can you knoll? can they knoll?	can I be knolling? can you be knolling? can he be knolling? can we be knolling? can you be knolling? can they be knolling?
Perfect	V-ing perfect
can I have knolled? can you have knolled? can he have knolled? can we have knolled? can you have knolled? can they have knolled?	can I have been knolling? can you have been knolling? can he have been knolling? can we have been knolling? can you have been knolling? can they have been knolling?

Interro-negative form

Simple form	V-ing form
can't I knoll? can't you knoll? can't he knoll? can't we knoll? can't you knoll? can't they knoll?	can't I be knolling? can't you be knolling? can't he be knolling? can't we be knolling? can't you be knolling? can't they be knolling?
Perfect	V-ing perfect
can't I have knolled? can't you have knolled? can't he have knolled? can't we have knolled? can't you have knolled? can't they have knolled?	can't I have been knolling? can't you have been knolling? can't he have been knolling? can't we have been knolling? can't you have been knolling? can't they have been knolling?