I must signify you must signify she must signify we must signify you must signify they must signify
V-ing form
I must be signifying you must be signifying she must be signifying we must be signifying you must be signifying they must be signifying
Perfect
I must have signified you must have signified she must have signified we must have signified you must have signified they must have signified
V-ing perfect
I must have been signifying you must have been signifying she must have been signifying we must have been signifying you must have been signifying they must have been signifying
Negation
Simple form
I must not signify you must not signify she must not signify we must not signify you must not signify they must not signify
V-ing form
I must not be signifying you must not be signifying she must not be signifying we must not be signifying you must not be signifying they must not be signifying
Perfect
I must not have signified you must not have signified she must not have signified we must not have signified you must not have signified they must not have signified
V-ing perfect
I must not have been signifying you must not have been signifying she must not have been signifying we must not have been signifying you must not have been signifying they must not have been signifying
Interrogative form
Simple form
must I signify? must you signify? must she signify? must we signify? must you signify? must they signify?
V-ing form
must I be signifying? must you be signifying? must she be signifying? must we be signifying? must you be signifying? must they be signifying?
Perfect
must I have signified? must you have signified? must she have signified? must we have signified? must you have signified? must they have signified?
V-ing perfect
must I have been signifying? must you have been signifying? must she have been signifying? must we have been signifying? must you have been signifying? must they have been signifying?
Interro-negative form
Simple form
must I not signify? must you not signify? must she not signify? must we not signify? must you not signify? must they not signify?
V-ing form
must I not be signifying? must you not be signifying? must she not be signifying? must we not be signifying? must you not be signifying? must they not be signifying?
Perfect
must I not have signified? must you not have signified? must she not have signified? must we not have signified? must you not have signified? must they not have signified?
V-ing perfect
must I not have been signifying? must you not have been signifying? must she not have been signifying? must we not have been signifying? must you not have been signifying? must they not have been signifying?