I must hail you must hail she must hail we must hail you must hail they must hail
V-ing form
I must be hailing you must be hailing she must be hailing we must be hailing you must be hailing they must be hailing
Perfect
I must have hailed you must have hailed she must have hailed we must have hailed you must have hailed they must have hailed
V-ing perfect
I must have been hailing you must have been hailing she must have been hailing we must have been hailing you must have been hailing they must have been hailing
Negation
Simple form
I must not hail you must not hail she must not hail we must not hail you must not hail they must not hail
V-ing form
I must not be hailing you must not be hailing she must not be hailing we must not be hailing you must not be hailing they must not be hailing
Perfect
I must not have hailed you must not have hailed she must not have hailed we must not have hailed you must not have hailed they must not have hailed
V-ing perfect
I must not have been hailing you must not have been hailing she must not have been hailing we must not have been hailing you must not have been hailing they must not have been hailing
Interrogative form
Simple form
must I hail? must you hail? must she hail? must we hail? must you hail? must they hail?
V-ing form
must I be hailing? must you be hailing? must she be hailing? must we be hailing? must you be hailing? must they be hailing?
Perfect
must I have hailed? must you have hailed? must she have hailed? must we have hailed? must you have hailed? must they have hailed?
V-ing perfect
must I have been hailing? must you have been hailing? must she have been hailing? must we have been hailing? must you have been hailing? must they have been hailing?
Interro-negative form
Simple form
must I not hail? must you not hail? must she not hail? must we not hail? must you not hail? must they not hail?
V-ing form
must I not be hailing? must you not be hailing? must she not be hailing? must we not be hailing? must you not be hailing? must they not be hailing?
Perfect
must I not have hailed? must you not have hailed? must she not have hailed? must we not have hailed? must you not have hailed? must they not have hailed?
V-ing perfect
must I not have been hailing? must you not have been hailing? must she not have been hailing? must we not have been hailing? must you not have been hailing? must they not have been hailing?