English verb conjugation
CAN WAIL

Regular verb: wail - wailed - wailed

Affirmation

Simple form	V-ing form
I can wail you can wail he can wail we can wail you can wail they can wail	I can be wailing you can be wailing he can be wailing we can be wailing you can be wailing they can be wailing
Perfect	V-ing perfect
I can have wailed you can have wailed he can have wailed we can have wailed you can have wailed they can have wailed	I can have been wailing you can have been wailing he can have been wailing we can have been wailing you can have been wailing they can have been wailing

Negation

Simple form	V-ing form
I can't wail you can't wail he can't wail we can't wail you can't wail they can't wail	I can't be wailing you can't be wailing he can't be wailing we can't be wailing you can't be wailing they can't be wailing
Perfect	V-ing perfect
I can't have wailed you can't have wailed he can't have wailed we can't have wailed you can't have wailed they can't have wailed	I can't have been wailing you can't have been wailing he can't have been wailing we can't have been wailing you can't have been wailing they can't have been wailing

Interrogative form

Simple form	V-ing form
can I wail? can you wail? can he wail? can we wail? can you wail? can they wail?	can I be wailing? can you be wailing? can he be wailing? can we be wailing? can you be wailing? can they be wailing?
Perfect	V-ing perfect
can I have wailed? can you have wailed? can he have wailed? can we have wailed? can you have wailed? can they have wailed?	can I have been wailing? can you have been wailing? can he have been wailing? can we have been wailing? can you have been wailing? can they have been wailing?

Interro-negative form

Simple form	V-ing form
can't I wail? can't you wail? can't he wail? can't we wail? can't you wail? can't they wail?	can't I be wailing? can't you be wailing? can't he be wailing? can't we be wailing? can't you be wailing? can't they be wailing?
Perfect	V-ing perfect
can't I have wailed? can't you have wailed? can't he have wailed? can't we have wailed? can't you have wailed? can't they have wailed?	can't I have been wailing? can't you have been wailing? can't he have been wailing? can't we have been wailing? can't you have been wailing? can't they have been wailing?