English verb conjugation
MUST AIL

Regular verb: ail - ailed - ailed

Affirmation

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

Negation

Simple form	V-ing form
I must not ail you must not ail he must not ail we must not ail you must not ail they must not ail	I must not be ailing you must not be ailing he must not be ailing we must not be ailing you must not be ailing they must not be ailing
Perfect	V-ing perfect
I must not have ailed you must not have ailed he must not have ailed we must not have ailed you must not have ailed they must not have ailed	I must not have been ailing you must not have been ailing he must not have been ailing we must not have been ailing you must not have been ailing they must not have been ailing

Interrogative form

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

Interro-negative form

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