must helm
Regular verb: helm - helmed- helmed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must helm
you must helm
she must helm
we must helm
you must helm
they must helm 	I must be helming
you must be helming
she must be helming
we must be helming
you must be helming
they must be helming	I must have helmed
you must have helmed
she must have helmed
we must have helmed
you must have helmed
they must have helmed	I must have been helming
you must have been helming
she must have been helming
we must have been helming
you must have been helming
they must have been helming	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't helm
you mustn't helm
she mustn't helm
we mustn't helm
you mustn't helm
they mustn't helm 	I mustn't be helming
you mustn't be helming
she mustn't be helming
we mustn't be helming
you mustn't be helming
they mustn't be helming	I mustn't have helmed
you mustn't have helmed
she mustn't have helmed
we mustn't have helmed
you mustn't have helmed
they mustn't have helmed	I mustn't have been helming
you mustn't have been helming
she mustn't have been helming
we mustn't have been helming
you mustn't have been helming
they mustn't have been helming	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I helm?
must you helm?
must she helm?
must we helm?
must you helm?
must they helm? 	must I be helming?
must you be helming?
must she be helming?
must we be helming?
must you be helming?
must they be helming? 	must I have helmed?
must you have helmed?
must she have helmed?
must we have helmed?
must you have helmed?
must they have helmed? 	must I have been helming?
must you have been helming?
must she have been helming?
must we have been helming?
must you have been helming?
must they have been helming? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I helm?
mustn't you helm?
mustn't she helm?
mustn't we helm?
mustn't you helm?
mustn't they helm? 	mustn't I be helming?
mustn't you be helming?
mustn't she be helming?
mustn't we be helming?
mustn't you be helming?
mustn't they be helming? 	mustn't I have helmed?
mustn't you have helmed?
mustn't she have helmed?
mustn't we have helmed?
mustn't you have helmed?
mustn't they have helmed? 	mustn't I have been helming?
mustn't you have been helming?
mustn't she have been helming?
mustn't we have been helming?
mustn't you have been helming?
mustn't they have been helming?