I must revise you must revise she must revise we must revise you must revise they must revise
V-ing form
I must be revising you must be revising she must be revising we must be revising you must be revising they must be revising
Perfect
I must have revised you must have revised she must have revised we must have revised you must have revised they must have revised
V-ing perfect
I must have been revising you must have been revising she must have been revising we must have been revising you must have been revising they must have been revising
Negation
Simple form
I must not revise you must not revise she must not revise we must not revise you must not revise they must not revise
V-ing form
I must not be revising you must not be revising she must not be revising we must not be revising you must not be revising they must not be revising
Perfect
I must not have revised you must not have revised she must not have revised we must not have revised you must not have revised they must not have revised
V-ing perfect
I must not have been revising you must not have been revising she must not have been revising we must not have been revising you must not have been revising they must not have been revising
Interrogative form
Simple form
must I revise? must you revise? must she revise? must we revise? must you revise? must they revise?
V-ing form
must I be revising? must you be revising? must she be revising? must we be revising? must you be revising? must they be revising?
Perfect
must I have revised? must you have revised? must she have revised? must we have revised? must you have revised? must they have revised?
V-ing perfect
must I have been revising? must you have been revising? must she have been revising? must we have been revising? must you have been revising? must they have been revising?
Interro-negative form
Simple form
must I not revise? must you not revise? must she not revise? must we not revise? must you not revise? must they not revise?
V-ing form
must I not be revising? must you not be revising? must she not be revising? must we not be revising? must you not be revising? must they not be revising?
Perfect
must I not have revised? must you not have revised? must she not have revised? must we not have revised? must you not have revised? must they not have revised?
V-ing perfect
must I not have been revising? must you not have been revising? must she not have been revising? must we not have been revising? must you not have been revising? must they not have been revising?