English verb conjugation
CAN AIL

Regular verb: ail - ailed - ailed

Affirmation

Simple form	V-ing form
I can ail you can ail she can ail we can ail you can ail they can ail	I can be ailing you can be ailing she can be ailing we can be ailing you can be ailing they can be ailing
Perfect	V-ing perfect
I can have ailed you can have ailed she can have ailed we can have ailed you can have ailed they can have ailed	I can have been ailing you can have been ailing she can have been ailing we can have been ailing you can have been ailing they can have been ailing

Negation

Simple form	V-ing form
I cannot ail you cannot ail she cannot ail we cannot ail you cannot ail they cannot ail	I cannot be ailing you cannot be ailing she cannot be ailing we cannot be ailing you cannot be ailing they cannot be ailing
Perfect	V-ing perfect
I cannot have ailed you cannot have ailed she cannot have ailed we cannot have ailed you cannot have ailed they cannot have ailed	I cannot have been ailing you cannot have been ailing she cannot have been ailing we cannot have been ailing you cannot have been ailing they cannot have been ailing

Interrogative form

Simple form	V-ing form
can I ail? can you ail? can she ail? can we ail? can you ail? can they ail?	can I be ailing? can you be ailing? can she be ailing? can we be ailing? can you be ailing? can they be ailing?
Perfect	V-ing perfect
can I have ailed? can you have ailed? can she have ailed? can we have ailed? can you have ailed? can they have ailed?	can I have been ailing? can you have been ailing? can she have been ailing? can we have been ailing? can you have been ailing? can they have been ailing?

Interro-negative form

Simple form	V-ing form
can I not ail? can you not ail? can she not ail? can we not ail? can you not ail? can they not ail?	can I not be ailing? can you not be ailing? can she not be ailing? can we not be ailing? can you not be ailing? can they not be ailing?
Perfect	V-ing perfect
can I not have ailed? can you not have ailed? can she not have ailed? can we not have ailed? can you not have ailed? can they not have ailed?	can I not have been ailing? can you not have been ailing? can she not have been ailing? can we not have been ailing? can you not have been ailing? can they not have been ailing?