I must faint you must faint she must faint we must faint you must faint they must faint
V-ing form
I must be fainting you must be fainting she must be fainting we must be fainting you must be fainting they must be fainting
Perfect
I must have fainted you must have fainted she must have fainted we must have fainted you must have fainted they must have fainted
V-ing perfect
I must have been fainting you must have been fainting she must have been fainting we must have been fainting you must have been fainting they must have been fainting
Negation
Simple form
I must not faint you must not faint she must not faint we must not faint you must not faint they must not faint
V-ing form
I must not be fainting you must not be fainting she must not be fainting we must not be fainting you must not be fainting they must not be fainting
Perfect
I must not have fainted you must not have fainted she must not have fainted we must not have fainted you must not have fainted they must not have fainted
V-ing perfect
I must not have been fainting you must not have been fainting she must not have been fainting we must not have been fainting you must not have been fainting they must not have been fainting
Interrogative form
Simple form
must I faint? must you faint? must she faint? must we faint? must you faint? must they faint?
V-ing form
must I be fainting? must you be fainting? must she be fainting? must we be fainting? must you be fainting? must they be fainting?
Perfect
must I have fainted? must you have fainted? must she have fainted? must we have fainted? must you have fainted? must they have fainted?
V-ing perfect
must I have been fainting? must you have been fainting? must she have been fainting? must we have been fainting? must you have been fainting? must they have been fainting?
Interro-negative form
Simple form
must I not faint? must you not faint? must she not faint? must we not faint? must you not faint? must they not faint?
V-ing form
must I not be fainting? must you not be fainting? must she not be fainting? must we not be fainting? must you not be fainting? must they not be fainting?
Perfect
must I not have fainted? must you not have fainted? must she not have fainted? must we not have fainted? must you not have fainted? must they not have fainted?
V-ing perfect
must I not have been fainting? must you not have been fainting? must she not have been fainting? must we not have been fainting? must you not have been fainting? must they not have been fainting?