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