I must prevail you must prevail he must prevail we must prevail you must prevail they must prevail
V-ing form
I must be prevailing you must be prevailing he must be prevailing we must be prevailing you must be prevailing they must be prevailing
Perfect
I must have prevailed you must have prevailed he must have prevailed we must have prevailed you must have prevailed they must have prevailed
V-ing perfect
I must have been prevailing you must have been prevailing he must have been prevailing we must have been prevailing you must have been prevailing they must have been prevailing
Negation
Simple form
I must not prevail you must not prevail he must not prevail we must not prevail you must not prevail they must not prevail
V-ing form
I must not be prevailing you must not be prevailing he must not be prevailing we must not be prevailing you must not be prevailing they must not be prevailing
Perfect
I must not have prevailed you must not have prevailed he must not have prevailed we must not have prevailed you must not have prevailed they must not have prevailed
V-ing perfect
I must not have been prevailing you must not have been prevailing he must not have been prevailing we must not have been prevailing you must not have been prevailing they must not have been prevailing
Interrogative form
Simple form
must I prevail? must you prevail? must he prevail? must we prevail? must you prevail? must they prevail?
V-ing form
must I be prevailing? must you be prevailing? must he be prevailing? must we be prevailing? must you be prevailing? must they be prevailing?
Perfect
must I have prevailed? must you have prevailed? must he have prevailed? must we have prevailed? must you have prevailed? must they have prevailed?
V-ing perfect
must I have been prevailing? must you have been prevailing? must he have been prevailing? must we have been prevailing? must you have been prevailing? must they have been prevailing?
Interro-negative form
Simple form
must I not prevail? must you not prevail? must he not prevail? must we not prevail? must you not prevail? must they not prevail?
V-ing form
must I not be prevailing? must you not be prevailing? must he not be prevailing? must we not be prevailing? must you not be prevailing? must they not be prevailing?
Perfect
must I not have prevailed? must you not have prevailed? must he not have prevailed? must we not have prevailed? must you not have prevailed? must they not have prevailed?
V-ing perfect
must I not have been prevailing? must you not have been prevailing? must he not have been prevailing? must we not have been prevailing? must you not have been prevailing? must they not have been prevailing?