English verb conjugation
CAN FLAIL

Regular verb: flail - flailed - flailed

Affirmation

Simple form	V-ing form
I can flail you can flail he can flail we can flail you can flail they can flail	I can be flailing you can be flailing he can be flailing we can be flailing you can be flailing they can be flailing
Perfect	V-ing perfect
I can have flailed you can have flailed he can have flailed we can have flailed you can have flailed they can have flailed	I can have been flailing you can have been flailing he can have been flailing we can have been flailing you can have been flailing they can have been flailing

Negation

Simple form	V-ing form
I can't flail you can't flail he can't flail we can't flail you can't flail they can't flail	I can't be flailing you can't be flailing he can't be flailing we can't be flailing you can't be flailing they can't be flailing
Perfect	V-ing perfect
I can't have flailed you can't have flailed he can't have flailed we can't have flailed you can't have flailed they can't have flailed	I can't have been flailing you can't have been flailing he can't have been flailing we can't have been flailing you can't have been flailing they can't have been flailing

Interrogative form

Simple form	V-ing form
can I flail? can you flail? can he flail? can we flail? can you flail? can they flail?	can I be flailing? can you be flailing? can he be flailing? can we be flailing? can you be flailing? can they be flailing?
Perfect	V-ing perfect
can I have flailed? can you have flailed? can he have flailed? can we have flailed? can you have flailed? can they have flailed?	can I have been flailing? can you have been flailing? can he have been flailing? can we have been flailing? can you have been flailing? can they have been flailing?

Interro-negative form

Simple form	V-ing form
can't I flail? can't you flail? can't he flail? can't we flail? can't you flail? can't they flail?	can't I be flailing? can't you be flailing? can't he be flailing? can't we be flailing? can't you be flailing? can't they be flailing?
Perfect	V-ing perfect
can't I have flailed? can't you have flailed? can't he have flailed? can't we have flailed? can't you have flailed? can't they have flailed?	can't I have been flailing? can't you have been flailing? can't he have been flailing? can't we have been flailing? can't you have been flailing? can't they have been flailing?