must chew
Regular verb: chew - chewed- chewed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must chew
you must chew
she must chew
we must chew
you must chew
they must chew 	I must be chewing
you must be chewing
she must be chewing
we must be chewing
you must be chewing
they must be chewing	I must have chewed
you must have chewed
she 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
she 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
she 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
she 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
she 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
she 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 she chew?
must we chew?
must you chew?
must they chew? 	must I be chewing?
must you be chewing?
must she be chewing?
must we be chewing?
must you be chewing?
must they be chewing? 	must I have chewed?
must you have chewed?
must she 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 she 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 she 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 she 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 she 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 she have been chewing?
mustn't we have been chewing?
mustn't you have been chewing?
mustn't they have been chewing?