I must butcher you must butcher he must butcher we must butcher you must butcher they must butcher
V-ing form
I must be butchering you must be butchering he must be butchering we must be butchering you must be butchering they must be butchering
Perfect
I must have butchered you must have butchered he must have butchered we must have butchered you must have butchered they must have butchered
V-ing perfect
I must have been butchering you must have been butchering he must have been butchering we must have been butchering you must have been butchering they must have been butchering
Negation
Simple form
I must not butcher you must not butcher he must not butcher we must not butcher you must not butcher they must not butcher
V-ing form
I must not be butchering you must not be butchering he must not be butchering we must not be butchering you must not be butchering they must not be butchering
Perfect
I must not have butchered you must not have butchered he must not have butchered we must not have butchered you must not have butchered they must not have butchered
V-ing perfect
I must not have been butchering you must not have been butchering he 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
must I butcher? must you butcher? must he butcher? must we butcher? must you butcher? must they butcher?
V-ing form
must I be butchering? must you be butchering? must he be butchering? must we be butchering? must you be butchering? must they be butchering?
Perfect
must I have butchered? must you have butchered? must he have butchered? must we have butchered? must you have butchered? must they have butchered?
V-ing perfect
must I have been butchering? must you have been butchering? must he have been butchering? must we have been butchering? must you have been butchering? must they have been butchering?
Interro-negative form
Simple form
must I not butcher? must you not butcher? must he not butcher? must we not butcher? must you not butcher? must they not butcher?
V-ing form
must I not be butchering? must you not be butchering? must he not be butchering? must we not be butchering? must you not be butchering? must they not be butchering?
Perfect
must I not have butchered? must you not have butchered? must he not have butchered? must we not have butchered? must you not have butchered? must they not have butchered?
V-ing perfect
must I not have been butchering? must you not have been butchering? must he not have been butchering? must we not have been butchering? must you not have been butchering? must they not have been butchering?