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 mustn't repine you mustn't repine he 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 he 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 he 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 he 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 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
mustn't I repine? mustn't you repine? mustn't he 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 he 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 he 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 he have been repining? mustn't we have been repining? mustn't you have been repining? mustn't they have been repining?