English verb conjugation
MUST COOK

Regular verb: cook - cooked - cooked

Affirmation

Simple form	V-ing form
I must cook you must cook he must cook we must cook you must cook they must cook	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	V-ing 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	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	V-ing 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	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	V-ing 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	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	V-ing form
must I cook? must you cook? must he cook? must we cook? must you cook? must they cook?	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	V-ing 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?	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	V-ing 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?	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	V-ing 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?	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?