I must deface you must deface she must deface we must deface you must deface they must deface
V-ing form
I must be defacing you must be defacing she must be defacing we must be defacing you must be defacing they must be defacing
Perfect
I must have defaced you must have defaced she must have defaced we must have defaced you must have defaced they must have defaced
V-ing perfect
I must have been defacing you must have been defacing she must have been defacing we must have been defacing you must have been defacing they must have been defacing
Negation
Simple form
I must not deface you must not deface she must not deface we must not deface you must not deface they must not deface
V-ing form
I must not be defacing you must not be defacing she must not be defacing we must not be defacing you must not be defacing they must not be defacing
Perfect
I must not have defaced you must not have defaced she must not have defaced we must not have defaced you must not have defaced they must not have defaced
V-ing perfect
I must not have been defacing you must not have been defacing she must not have been defacing we must not have been defacing you must not have been defacing they must not have been defacing
Interrogative form
Simple form
must I deface? must you deface? must she deface? must we deface? must you deface? must they deface?
V-ing form
must I be defacing? must you be defacing? must she be defacing? must we be defacing? must you be defacing? must they be defacing?
Perfect
must I have defaced? must you have defaced? must she have defaced? must we have defaced? must you have defaced? must they have defaced?
V-ing perfect
must I have been defacing? must you have been defacing? must she have been defacing? must we have been defacing? must you have been defacing? must they have been defacing?
Interro-negative form
Simple form
must I not deface? must you not deface? must she not deface? must we not deface? must you not deface? must they not deface?
V-ing form
must I not be defacing? must you not be defacing? must she not be defacing? must we not be defacing? must you not be defacing? must they not be defacing?
Perfect
must I not have defaced? must you not have defaced? must she not have defaced? must we not have defaced? must you not have defaced? must they not have defaced?
V-ing perfect
must I not have been defacing? must you not have been defacing? must she not have been defacing? must we not have been defacing? must you not have been defacing? must they not have been defacing?