English verb conjugation
MUST PREVAIL

Regular verb: prevail - prevailed - prevailed

Affirmation

Simple form	V-ing form
I must prevail you must prevail she must prevail we must prevail you must prevail they must prevail	I must be prevailing you must be prevailing she must be prevailing we must be prevailing you must be prevailing they must be prevailing
Perfect	V-ing perfect
I must have prevailed you must have prevailed she must have prevailed we must have prevailed you must have prevailed they must have prevailed	I must have been prevailing you must have been prevailing she must have been prevailing we must have been prevailing you must have been prevailing they must have been prevailing

Negation

Simple form	V-ing form
I mustn't prevail you mustn't prevail she mustn't prevail we mustn't prevail you mustn't prevail they mustn't prevail	I mustn't be prevailing you mustn't be prevailing she mustn't be prevailing we mustn't be prevailing you mustn't be prevailing they mustn't be prevailing
Perfect	V-ing perfect
I mustn't have prevailed you mustn't have prevailed she mustn't have prevailed we mustn't have prevailed you mustn't have prevailed they mustn't have prevailed	I mustn't have been prevailing you mustn't have been prevailing she mustn't have been prevailing we mustn't have been prevailing you mustn't have been prevailing they mustn't have been prevailing

Interrogative form

Simple form	V-ing form
must I prevail? must you prevail? must she prevail? must we prevail? must you prevail? must they prevail?	must I be prevailing? must you be prevailing? must she be prevailing? must we be prevailing? must you be prevailing? must they be prevailing?
Perfect	V-ing perfect
must I have prevailed? must you have prevailed? must she have prevailed? must we have prevailed? must you have prevailed? must they have prevailed?	must I have been prevailing? must you have been prevailing? must she have been prevailing? must we have been prevailing? must you have been prevailing? must they have been prevailing?

Interro-negative form

Simple form	V-ing form
mustn't I prevail? mustn't you prevail? mustn't she prevail? mustn't we prevail? mustn't you prevail? mustn't they prevail?	mustn't I be prevailing? mustn't you be prevailing? mustn't she be prevailing? mustn't we be prevailing? mustn't you be prevailing? mustn't they be prevailing?
Perfect	V-ing perfect
mustn't I have prevailed? mustn't you have prevailed? mustn't she have prevailed? mustn't we have prevailed? mustn't you have prevailed? mustn't they have prevailed?	mustn't I have been prevailing? mustn't you have been prevailing? mustn't she have been prevailing? mustn't we have been prevailing? mustn't you have been prevailing? mustn't they have been prevailing?