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 can't croon you can't croon he can't croon we can't croon you can't croon they can't croon	I can't be crooning you can't be crooning he can't be crooning we can't be crooning you can't be crooning they can't be crooning
Perfect	V-ing perfect
I can't have crooned you can't have crooned he can't have crooned we can't have crooned you can't have crooned they can't have crooned	I can't have been crooning you can't have been crooning he can't have been crooning we can't have been crooning you can't have been crooning they can't 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't I croon? can't you croon? can't he croon? can't we croon? can't you croon? can't they croon?	can't I be crooning? can't you be crooning? can't he be crooning? can't we be crooning? can't you be crooning? can't they be crooning?
Perfect	V-ing perfect
can't I have crooned? can't you have crooned? can't he have crooned? can't we have crooned? can't you have crooned? can't they have crooned?	can't I have been crooning? can't you have been crooning? can't he have been crooning? can't we have been crooning? can't you have been crooning? can't they have been crooning?