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 must not butcher
you must not butcher
she must not butcher
we must not butcher
you must not butcher
they must not butcher 	I must not be butchering
you must not be butchering
she must not be butchering
we must not be butchering
you must not be butchering
they must not be butchering	I must not have butchered
you must not have butchered
she must not have butchered
we must not have butchered
you must not have butchered
they must not have butchered	I must not have been butchering
you must not have been butchering
she must not have been butchering
we must not have been butchering
you must not have been butchering
they must not 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 	
must I not butcher?
must you not butcher?
must she not butcher?
must we not butcher?
must you not butcher?
must they not butcher? 	must I not be butchering?
must you not be butchering?
must she not be butchering?
must we not be butchering?
must you not be butchering?
must they not be butchering? 	must I not have butchered?
must you not have butchered?
must she not have butchered?
must we not have butchered?
must you not have butchered?
must they not have butchered? 	must I not have been butchering?
must you not have been butchering?
must she not have been butchering?
must we not have been butchering?
must you not have been butchering?
must they not have been butchering?