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 cannot wail you cannot wail he cannot wail we cannot wail you cannot wail they cannot wail	I cannot be wailing you cannot be wailing he cannot be wailing we cannot be wailing you cannot be wailing they cannot be wailing
Perfect	V-ing perfect
I cannot have wailed you cannot have wailed he cannot have wailed we cannot have wailed you cannot have wailed they cannot have wailed	I cannot have been wailing you cannot have been wailing he cannot have been wailing we cannot have been wailing you cannot have been wailing they cannot 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 I not wail? can you not wail? can he not wail? can we not wail? can you not wail? can they not wail?	can I not be wailing? can you not be wailing? can he not be wailing? can we not be wailing? can you not be wailing? can they not be wailing?
Perfect	V-ing perfect
can I not have wailed? can you not have wailed? can he not have wailed? can we not have wailed? can you not have wailed? can they not have wailed?	can I not have been wailing? can you not have been wailing? can he not have been wailing? can we not have been wailing? can you not have been wailing? can they not have been wailing?