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