must charm
Regular verb: charm - charmed- charmed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must charm
you must charm
she must charm
we must charm
you must charm
they must charm 	I must be charming
you must be charming
she must be charming
we must be charming
you must be charming
they must be charming	I must have charmed
you must have charmed
she must have charmed
we must have charmed
you must have charmed
they must have charmed	I must have been charming
you must have been charming
she must have been charming
we must have been charming
you must have been charming
they must have been charming	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't charm
you mustn't charm
she mustn't charm
we mustn't charm
you mustn't charm
they mustn't charm 	I mustn't be charming
you mustn't be charming
she mustn't be charming
we mustn't be charming
you mustn't be charming
they mustn't be charming	I mustn't have charmed
you mustn't have charmed
she mustn't have charmed
we mustn't have charmed
you mustn't have charmed
they mustn't have charmed	I mustn't have been charming
you mustn't have been charming
she mustn't have been charming
we mustn't have been charming
you mustn't have been charming
they mustn't have been charming	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I charm?
must you charm?
must she charm?
must we charm?
must you charm?
must they charm? 	must I be charming?
must you be charming?
must she be charming?
must we be charming?
must you be charming?
must they be charming? 	must I have charmed?
must you have charmed?
must she have charmed?
must we have charmed?
must you have charmed?
must they have charmed? 	must I have been charming?
must you have been charming?
must she have been charming?
must we have been charming?
must you have been charming?
must they have been charming? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I charm?
mustn't you charm?
mustn't she charm?
mustn't we charm?
mustn't you charm?
mustn't they charm? 	mustn't I be charming?
mustn't you be charming?
mustn't she be charming?
mustn't we be charming?
mustn't you be charming?
mustn't they be charming? 	mustn't I have charmed?
mustn't you have charmed?
mustn't she have charmed?
mustn't we have charmed?
mustn't you have charmed?
mustn't they have charmed? 	mustn't I have been charming?
mustn't you have been charming?
mustn't she have been charming?
mustn't we have been charming?
mustn't you have been charming?
mustn't they have been charming?