I must repine you must repine she must repine we must repine you must repine they must repine
V-ing form
I must be repining you must be repining she must be repining we must be repining you must be repining they must be repining
Perfect
I must have repined you must have repined she 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 she 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 she 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 she 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 she 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 she 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 she repine? must we repine? must you repine? must they repine?
V-ing form
must I be repining? must you be repining? must she be repining? must we be repining? must you be repining? must they be repining?
Perfect
must I have repined? must you have repined? must she 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 she 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 she 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 she 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 she 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 she not have been repining? must we not have been repining? must you not have been repining? must they not have been repining?