English verb conjugation
CAN KNELL

Regular verb: knell - knelled - knelled

Affirmation

Simple form	V-ing form
I can knell you can knell he can knell we can knell you can knell they can knell	I can be knelling you can be knelling he can be knelling we can be knelling you can be knelling they can be knelling
Perfect	V-ing perfect
I can have knelled you can have knelled he can have knelled we can have knelled you can have knelled they can have knelled	I can have been knelling you can have been knelling he can have been knelling we can have been knelling you can have been knelling they can have been knelling

Negation

Simple form	V-ing form
I cannot knell you cannot knell he cannot knell we cannot knell you cannot knell they cannot knell	I cannot be knelling you cannot be knelling he cannot be knelling we cannot be knelling you cannot be knelling they cannot be knelling
Perfect	V-ing perfect
I cannot have knelled you cannot have knelled he cannot have knelled we cannot have knelled you cannot have knelled they cannot have knelled	I cannot have been knelling you cannot have been knelling he cannot have been knelling we cannot have been knelling you cannot have been knelling they cannot have been knelling

Interrogative form

Simple form	V-ing form
can I knell? can you knell? can he knell? can we knell? can you knell? can they knell?	can I be knelling? can you be knelling? can he be knelling? can we be knelling? can you be knelling? can they be knelling?
Perfect	V-ing perfect
can I have knelled? can you have knelled? can he have knelled? can we have knelled? can you have knelled? can they have knelled?	can I have been knelling? can you have been knelling? can he have been knelling? can we have been knelling? can you have been knelling? can they have been knelling?

Interro-negative form

Simple form	V-ing form
can I not knell? can you not knell? can he not knell? can we not knell? can you not knell? can they not knell?	can I not be knelling? can you not be knelling? can he not be knelling? can we not be knelling? can you not be knelling? can they not be knelling?
Perfect	V-ing perfect
can I not have knelled? can you not have knelled? can he not have knelled? can we not have knelled? can you not have knelled? can they not have knelled?	can I not have been knelling? can you not have been knelling? can he not have been knelling? can we not have been knelling? can you not have been knelling? can they not have been knelling?