must chamfer
Regular verb: chamfer - chamfered- chamfered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must chamfer
you must chamfer
she must chamfer
we must chamfer
you must chamfer
they must chamfer 	I must be chamfering
you must be chamfering
she must be chamfering
we must be chamfering
you must be chamfering
they must be chamfering	I must have chamfered
you must have chamfered
she must have chamfered
we must have chamfered
you must have chamfered
they must have chamfered	I must have been chamfering
you must have been chamfering
she must have been chamfering
we must have been chamfering
you must have been chamfering
they must have been chamfering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't chamfer
you mustn't chamfer
she mustn't chamfer
we mustn't chamfer
you mustn't chamfer
they mustn't chamfer 	I mustn't be chamfering
you mustn't be chamfering
she mustn't be chamfering
we mustn't be chamfering
you mustn't be chamfering
they mustn't be chamfering	I mustn't have chamfered
you mustn't have chamfered
she mustn't have chamfered
we mustn't have chamfered
you mustn't have chamfered
they mustn't have chamfered	I mustn't have been chamfering
you mustn't have been chamfering
she mustn't have been chamfering
we mustn't have been chamfering
you mustn't have been chamfering
they mustn't have been chamfering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I chamfer?
must you chamfer?
must she chamfer?
must we chamfer?
must you chamfer?
must they chamfer? 	must I be chamfering?
must you be chamfering?
must she be chamfering?
must we be chamfering?
must you be chamfering?
must they be chamfering? 	must I have chamfered?
must you have chamfered?
must she have chamfered?
must we have chamfered?
must you have chamfered?
must they have chamfered? 	must I have been chamfering?
must you have been chamfering?
must she have been chamfering?
must we have been chamfering?
must you have been chamfering?
must they have been chamfering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I chamfer?
mustn't you chamfer?
mustn't she chamfer?
mustn't we chamfer?
mustn't you chamfer?
mustn't they chamfer? 	mustn't I be chamfering?
mustn't you be chamfering?
mustn't she be chamfering?
mustn't we be chamfering?
mustn't you be chamfering?
mustn't they be chamfering? 	mustn't I have chamfered?
mustn't you have chamfered?
mustn't she have chamfered?
mustn't we have chamfered?
mustn't you have chamfered?
mustn't they have chamfered? 	mustn't I have been chamfering?
mustn't you have been chamfering?
mustn't she have been chamfering?
mustn't we have been chamfering?
mustn't you have been chamfering?
mustn't they have been chamfering?