I must ally you must ally he must ally we must ally you must ally they must ally
V-ing form
I must be allying you must be allying he must be allying we must be allying you must be allying they must be allying
Perfect
I must have allied you must have allied he must have allied we must have allied you must have allied they must have allied
V-ing perfect
I must have been allying you must have been allying he must have been allying we must have been allying you must have been allying they must have been allying
Negation
Simple form
I must not ally you must not ally he must not ally we must not ally you must not ally they must not ally
V-ing form
I must not be allying you must not be allying he must not be allying we must not be allying you must not be allying they must not be allying
Perfect
I must not have allied you must not have allied he must not have allied we must not have allied you must not have allied they must not have allied
V-ing perfect
I must not have been allying you must not have been allying he must not have been allying we must not have been allying you must not have been allying they must not have been allying
Interrogative form
Simple form
must I ally? must you ally? must he ally? must we ally? must you ally? must they ally?
V-ing form
must I be allying? must you be allying? must he be allying? must we be allying? must you be allying? must they be allying?
Perfect
must I have allied? must you have allied? must he have allied? must we have allied? must you have allied? must they have allied?
V-ing perfect
must I have been allying? must you have been allying? must he have been allying? must we have been allying? must you have been allying? must they have been allying?
Interro-negative form
Simple form
must I not ally? must you not ally? must he not ally? must we not ally? must you not ally? must they not ally?
V-ing form
must I not be allying? must you not be allying? must he not be allying? must we not be allying? must you not be allying? must they not be allying?
Perfect
must I not have allied? must you not have allied? must he not have allied? must we not have allied? must you not have allied? must they not have allied?
V-ing perfect
must I not have been allying? must you not have been allying? must he not have been allying? must we not have been allying? must you not have been allying? must they not have been allying?