English verb conjugation
CAN CROON

Regular verb: croon - crooned - crooned

Affirmation

Simple form	V-ing form
I can croon you can croon he can croon we can croon you can croon they can croon	I can be crooning you can be crooning he can be crooning we can be crooning you can be crooning they can be crooning
Perfect	V-ing perfect
I can have crooned you can have crooned he can have crooned we can have crooned you can have crooned they can have crooned	I can have been crooning you can have been crooning he can have been crooning we can have been crooning you can have been crooning they can have been crooning

Negation

Simple form	V-ing form
I cannot croon you cannot croon he cannot croon we cannot croon you cannot croon they cannot croon	I cannot be crooning you cannot be crooning he cannot be crooning we cannot be crooning you cannot be crooning they cannot be crooning
Perfect	V-ing perfect
I cannot have crooned you cannot have crooned he cannot have crooned we cannot have crooned you cannot have crooned they cannot have crooned	I cannot have been crooning you cannot have been crooning he cannot have been crooning we cannot have been crooning you cannot have been crooning they cannot have been crooning

Interrogative form

Simple form	V-ing form
can I croon? can you croon? can he croon? can we croon? can you croon? can they croon?	can I be crooning? can you be crooning? can he be crooning? can we be crooning? can you be crooning? can they be crooning?
Perfect	V-ing perfect
can I have crooned? can you have crooned? can he have crooned? can we have crooned? can you have crooned? can they have crooned?	can I have been crooning? can you have been crooning? can he have been crooning? can we have been crooning? can you have been crooning? can they have been crooning?

Interro-negative form

Simple form	V-ing form
can I not croon? can you not croon? can he not croon? can we not croon? can you not croon? can they not croon?	can I not be crooning? can you not be crooning? can he not be crooning? can we not be crooning? can you not be crooning? can they not be crooning?
Perfect	V-ing perfect
can I not have crooned? can you not have crooned? can he not have crooned? can we not have crooned? can you not have crooned? can they not have crooned?	can I not have been crooning? can you not have been crooning? can he not have been crooning? can we not have been crooning? can you not have been crooning? can they not have been crooning?