must butcher
Regular verb: butcher - butchered- butchered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must butcher
you must butcher
she must butcher
we must butcher
you must butcher
they must butcher 	I must be butchering
you must be butchering
she must be butchering
we must be butchering
you must be butchering
they must be butchering	I must have butchered
you must have butchered
she must have butchered
we must have butchered
you must have butchered
they must have butchered	I must have been butchering
you must have been butchering
she must have been butchering
we must have been butchering
you must have been butchering
they must have been butchering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't butcher
you mustn't butcher
she mustn't butcher
we mustn't butcher
you mustn't butcher
they mustn't butcher 	I mustn't be butchering
you mustn't be butchering
she mustn't be butchering
we mustn't be butchering
you mustn't be butchering
they mustn't be butchering	I mustn't have butchered
you mustn't have butchered
she mustn't have butchered
we mustn't have butchered
you mustn't have butchered
they mustn't have butchered	I mustn't have been butchering
you mustn't have been butchering
she mustn't have been butchering
we mustn't have been butchering
you mustn't have been butchering
they mustn't have been butchering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I butcher?
must you butcher?
must she butcher?
must we butcher?
must you butcher?
must they butcher? 	must I be butchering?
must you be butchering?
must she be butchering?
must we be butchering?
must you be butchering?
must they be butchering? 	must I have butchered?
must you have butchered?
must she have butchered?
must we have butchered?
must you have butchered?
must they have butchered? 	must I have been butchering?
must you have been butchering?
must she have been butchering?
must we have been butchering?
must you have been butchering?
must they have been butchering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I butcher?
mustn't you butcher?
mustn't she butcher?
mustn't we butcher?
mustn't you butcher?
mustn't they butcher? 	mustn't I be butchering?
mustn't you be butchering?
mustn't she be butchering?
mustn't we be butchering?
mustn't you be butchering?
mustn't they be butchering? 	mustn't I have butchered?
mustn't you have butchered?
mustn't she have butchered?
mustn't we have butchered?
mustn't you have butchered?
mustn't they have butchered? 	mustn't I have been butchering?
mustn't you have been butchering?
mustn't she have been butchering?
mustn't we have been butchering?
mustn't you have been butchering?
mustn't they have been butchering?