I must shirttail you must shirttail she must shirttail we must shirttail you must shirttail they must shirttail
Forme en V-ing
I must be shirttailing you must be shirttailing she must be shirttailing we must be shirttailing you must be shirttailing they must be shirttailing
Perfect
I must have shirttailed you must have shirttailed she must have shirttailed we must have shirttailed you must have shirttailed they must have shirttailed
Perfect en V-ing
I must have been shirttailing you must have been shirttailing she must have been shirttailing we must have been shirttailing you must have been shirttailing they must have been shirttailing
Négation
Forme simple
I must not shirttail you must not shirttail she must not shirttail we must not shirttail you must not shirttail they must not shirttail
Forme en V-ing
I must not be shirttailing you must not be shirttailing she must not be shirttailing we must not be shirttailing you must not be shirttailing they must not be shirttailing
Perfect
I must not have shirttailed you must not have shirttailed she must not have shirttailed we must not have shirttailed you must not have shirttailed they must not have shirttailed
Perfect en V-ing
I must not have been shirttailing you must not have been shirttailing she must not have been shirttailing we must not have been shirttailing you must not have been shirttailing they must not have been shirttailing
Forme interrogative
Forme simple
must I shirttail? must you shirttail? must she shirttail? must we shirttail? must you shirttail? must they shirttail?
Forme en V-ing
must I be shirttailing? must you be shirttailing? must she be shirttailing? must we be shirttailing? must you be shirttailing? must they be shirttailing?
Perfect
must I have shirttailed? must you have shirttailed? must she have shirttailed? must we have shirttailed? must you have shirttailed? must they have shirttailed?
Perfect en V-ing
must I have been shirttailing? must you have been shirttailing? must she have been shirttailing? must we have been shirttailing? must you have been shirttailing? must they have been shirttailing?
Forme interro-négative
Forme simple
must I not shirttail? must you not shirttail? must she not shirttail? must we not shirttail? must you not shirttail? must they not shirttail?
Forme en V-ing
must I not be shirttailing? must you not be shirttailing? must she not be shirttailing? must we not be shirttailing? must you not be shirttailing? must they not be shirttailing?
Perfect
must I not have shirttailed? must you not have shirttailed? must she not have shirttailed? must we not have shirttailed? must you not have shirttailed? must they not have shirttailed?
Perfect en V-ing
must I not have been shirttailing? must you not have been shirttailing? must she not have been shirttailing? must we not have been shirttailing? must you not have been shirttailing? must they not have been shirttailing?