I must repine you must repine he must repine we must repine you must repine they must repine
V-ing form
I must be repining you must be repining he must be repining we must be repining you must be repining they must be repining
Perfect
I must have repined you must have repined he must have repined we must have repined you must have repined they must have repined
V-ing perfect
I must have been repining you must have been repining he must have been repining we must have been repining you must have been repining they must have been repining
Negation
Simple form
I must not repine you must not repine he must not repine we must not repine you must not repine they must not repine
V-ing form
I must not be repining you must not be repining he must not be repining we must not be repining you must not be repining they must not be repining
Perfect
I must not have repined you must not have repined he must not have repined we must not have repined you must not have repined they must not have repined
V-ing perfect
I must not have been repining you must not have been repining he must not have been repining we must not have been repining you must not have been repining they must not have been repining
Interrogative form
Simple form
must I repine? must you repine? must he repine? must we repine? must you repine? must they repine?
V-ing form
must I be repining? must you be repining? must he be repining? must we be repining? must you be repining? must they be repining?
Perfect
must I have repined? must you have repined? must he have repined? must we have repined? must you have repined? must they have repined?
V-ing perfect
must I have been repining? must you have been repining? must he have been repining? must we have been repining? must you have been repining? must they have been repining?
Interro-negative form
Simple form
must I not repine? must you not repine? must he not repine? must we not repine? must you not repine? must they not repine?
V-ing form
must I not be repining? must you not be repining? must he not be repining? must we not be repining? must you not be repining? must they not be repining?
Perfect
must I not have repined? must you not have repined? must he not have repined? must we not have repined? must you not have repined? must they not have repined?
V-ing perfect
must I not have been repining? must you not have been repining? must he not have been repining? must we not have been repining? must you not have been repining? must they not have been repining?