I must rest you must rest he must rest we must rest you must rest they must rest
V-ing form
I must be resting you must be resting he must be resting we must be resting you must be resting they must be resting
Perfect
I must have rested you must have rested he must have rested we must have rested you must have rested they must have rested
V-ing perfect
I must have been resting you must have been resting he must have been resting we must have been resting you must have been resting they must have been resting
Negation
Simple form
I mustn't rest you mustn't rest he mustn't rest we mustn't rest you mustn't rest they mustn't rest
V-ing form
I mustn't be resting you mustn't be resting he mustn't be resting we mustn't be resting you mustn't be resting they mustn't be resting
Perfect
I mustn't have rested you mustn't have rested he mustn't have rested we mustn't have rested you mustn't have rested they mustn't have rested
V-ing perfect
I mustn't have been resting you mustn't have been resting he mustn't have been resting we mustn't have been resting you mustn't have been resting they mustn't have been resting
Interrogative form
Simple form
must I rest? must you rest? must he rest? must we rest? must you rest? must they rest?
V-ing form
must I be resting? must you be resting? must he be resting? must we be resting? must you be resting? must they be resting?
Perfect
must I have rested? must you have rested? must he have rested? must we have rested? must you have rested? must they have rested?
V-ing perfect
must I have been resting? must you have been resting? must he have been resting? must we have been resting? must you have been resting? must they have been resting?
Interro-negative form
Simple form
mustn't I rest? mustn't you rest? mustn't he rest? mustn't we rest? mustn't you rest? mustn't they rest?
V-ing form
mustn't I be resting? mustn't you be resting? mustn't he be resting? mustn't we be resting? mustn't you be resting? mustn't they be resting?
Perfect
mustn't I have rested? mustn't you have rested? mustn't he have rested? mustn't we have rested? mustn't you have rested? mustn't they have rested?
V-ing perfect
mustn't I have been resting? mustn't you have been resting? mustn't he have been resting? mustn't we have been resting? mustn't you have been resting? mustn't they have been resting?