must cook
Regular verb: cook - cooked- cooked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must cook
you must cook
she must cook
we must cook
you must cook
they must cook 	I must be cooking
you must be cooking
she must be cooking
we must be cooking
you must be cooking
they must be cooking	I must have cooked
you must have cooked
she 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
she 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 	Perfect 	V-ing perfect 	
I mustn't cook
you mustn't cook
she 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
she mustn't be cooking
we mustn't be cooking
you mustn't be cooking
they mustn't be cooking	I mustn't have cooked
you mustn't have cooked
she 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
she 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 	Perfect 	V-ing perfect 	
must I cook?
must you cook?
must she cook?
must we cook?
must you cook?
must they cook? 	must I be cooking?
must you be cooking?
must she be cooking?
must we be cooking?
must you be cooking?
must they be cooking? 	must I have cooked?
must you have cooked?
must she 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 she 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 	Perfect 	V-ing perfect 	
mustn't I cook?
mustn't you cook?
mustn't she 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 she be cooking?
mustn't we be cooking?
mustn't you be cooking?
mustn't they be cooking? 	mustn't I have cooked?
mustn't you have cooked?
mustn't she 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 she have been cooking?
mustn't we have been cooking?
mustn't you have been cooking?
mustn't they have been cooking?