I must yelp you must yelp she must yelp we must yelp you must yelp they must yelp
Forme en V-ing
I must be yelping you must be yelping she must be yelping we must be yelping you must be yelping they must be yelping
Perfect
I must have yelped you must have yelped she must have yelped we must have yelped you must have yelped they must have yelped
Perfect en V-ing
I must have been yelping you must have been yelping she must have been yelping we must have been yelping you must have been yelping they must have been yelping
Négation
Forme simple
I must not yelp you must not yelp she must not yelp we must not yelp you must not yelp they must not yelp
Forme en V-ing
I must not be yelping you must not be yelping she must not be yelping we must not be yelping you must not be yelping they must not be yelping
Perfect
I must not have yelped you must not have yelped she must not have yelped we must not have yelped you must not have yelped they must not have yelped
Perfect en V-ing
I must not have been yelping you must not have been yelping she must not have been yelping we must not have been yelping you must not have been yelping they must not have been yelping
Forme interrogative
Forme simple
must I yelp? must you yelp? must she yelp? must we yelp? must you yelp? must they yelp?
Forme en V-ing
must I be yelping? must you be yelping? must she be yelping? must we be yelping? must you be yelping? must they be yelping?
Perfect
must I have yelped? must you have yelped? must she have yelped? must we have yelped? must you have yelped? must they have yelped?
Perfect en V-ing
must I have been yelping? must you have been yelping? must she have been yelping? must we have been yelping? must you have been yelping? must they have been yelping?
Forme interro-négative
Forme simple
must I not yelp? must you not yelp? must she not yelp? must we not yelp? must you not yelp? must they not yelp?
Forme en V-ing
must I not be yelping? must you not be yelping? must she not be yelping? must we not be yelping? must you not be yelping? must they not be yelping?
Perfect
must I not have yelped? must you not have yelped? must she not have yelped? must we not have yelped? must you not have yelped? must they not have yelped?
Perfect en V-ing
must I not have been yelping? must you not have been yelping? must she not have been yelping? must we not have been yelping? must you not have been yelping? must they not have been yelping?