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