must chew
Regular verb: chew - chewed- chewed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must chew
you must chew
he must chew
we must chew
you must chew
they must chew 	I must be chewing
you must be chewing
he must be chewing
we must be chewing
you must be chewing
they must be chewing	I must have chewed
you must have chewed
he must have chewed
we must have chewed
you must have chewed
they must have chewed	I must have been chewing
you must have been chewing
he must have been chewing
we must have been chewing
you must have been chewing
they must have been chewing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't chew
you mustn't chew
he mustn't chew
we mustn't chew
you mustn't chew
they mustn't chew 	I mustn't be chewing
you mustn't be chewing
he mustn't be chewing
we mustn't be chewing
you mustn't be chewing
they mustn't be chewing	I mustn't have chewed
you mustn't have chewed
he mustn't have chewed
we mustn't have chewed
you mustn't have chewed
they mustn't have chewed	I mustn't have been chewing
you mustn't have been chewing
he mustn't have been chewing
we mustn't have been chewing
you mustn't have been chewing
they mustn't have been chewing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I chew?
must you chew?
must he chew?
must we chew?
must you chew?
must they chew? 	must I be chewing?
must you be chewing?
must he be chewing?
must we be chewing?
must you be chewing?
must they be chewing? 	must I have chewed?
must you have chewed?
must he have chewed?
must we have chewed?
must you have chewed?
must they have chewed? 	must I have been chewing?
must you have been chewing?
must he have been chewing?
must we have been chewing?
must you have been chewing?
must they have been chewing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I chew?
mustn't you chew?
mustn't he chew?
mustn't we chew?
mustn't you chew?
mustn't they chew? 	mustn't I be chewing?
mustn't you be chewing?
mustn't he be chewing?
mustn't we be chewing?
mustn't you be chewing?
mustn't they be chewing? 	mustn't I have chewed?
mustn't you have chewed?
mustn't he have chewed?
mustn't we have chewed?
mustn't you have chewed?
mustn't they have chewed? 	mustn't I have been chewing?
mustn't you have been chewing?
mustn't he have been chewing?
mustn't we have been chewing?
mustn't you have been chewing?
mustn't they have been chewing?