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 mustn't repine you mustn't repine she mustn't repine we mustn't repine you mustn't repine they mustn't repine
V-ing form
I mustn't be repining you mustn't be repining she mustn't be repining we mustn't be repining you mustn't be repining they mustn't be repining
Perfect
I mustn't have repined you mustn't have repined she mustn't have repined we mustn't have repined you mustn't have repined they mustn't have repined
V-ing perfect
I mustn't have been repining you mustn't have been repining she mustn't have been repining we mustn't have been repining you mustn't have been repining they mustn't 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
mustn't I repine? mustn't you repine? mustn't she repine? mustn't we repine? mustn't you repine? mustn't they repine?
V-ing form
mustn't I be repining? mustn't you be repining? mustn't she be repining? mustn't we be repining? mustn't you be repining? mustn't they be repining?
Perfect
mustn't I have repined? mustn't you have repined? mustn't she have repined? mustn't we have repined? mustn't you have repined? mustn't they have repined?
V-ing perfect
mustn't I have been repining? mustn't you have been repining? mustn't she have been repining? mustn't we have been repining? mustn't you have been repining? mustn't they have been repining?