must dim
Regular verb: dim - dimmed- dimmed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must dim
you must dim
he must dim
we must dim
you must dim
they must dim 	I must be dimming
you must be dimming
he must be dimming
we must be dimming
you must be dimming
they must be dimming	I must have dimmed
you must have dimmed
he must have dimmed
we must have dimmed
you must have dimmed
they must have dimmed	I must have been dimming
you must have been dimming
he must have been dimming
we must have been dimming
you must have been dimming
they must have been dimming	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't dim
you mustn't dim
he mustn't dim
we mustn't dim
you mustn't dim
they mustn't dim 	I mustn't be dimming
you mustn't be dimming
he mustn't be dimming
we mustn't be dimming
you mustn't be dimming
they mustn't be dimming	I mustn't have dimmed
you mustn't have dimmed
he mustn't have dimmed
we mustn't have dimmed
you mustn't have dimmed
they mustn't have dimmed	I mustn't have been dimming
you mustn't have been dimming
he mustn't have been dimming
we mustn't have been dimming
you mustn't have been dimming
they mustn't have been dimming	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I dim?
must you dim?
must he dim?
must we dim?
must you dim?
must they dim? 	must I be dimming?
must you be dimming?
must he be dimming?
must we be dimming?
must you be dimming?
must they be dimming? 	must I have dimmed?
must you have dimmed?
must he have dimmed?
must we have dimmed?
must you have dimmed?
must they have dimmed? 	must I have been dimming?
must you have been dimming?
must he have been dimming?
must we have been dimming?
must you have been dimming?
must they have been dimming? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I dim?
mustn't you dim?
mustn't he dim?
mustn't we dim?
mustn't you dim?
mustn't they dim? 	mustn't I be dimming?
mustn't you be dimming?
mustn't he be dimming?
mustn't we be dimming?
mustn't you be dimming?
mustn't they be dimming? 	mustn't I have dimmed?
mustn't you have dimmed?
mustn't he have dimmed?
mustn't we have dimmed?
mustn't you have dimmed?
mustn't they have dimmed? 	mustn't I have been dimming?
mustn't you have been dimming?
mustn't he have been dimming?
mustn't we have been dimming?
mustn't you have been dimming?
mustn't they have been dimming?