I must uncork you must uncork she must uncork we must uncork you must uncork they must uncork
V-ing form
I must be uncorking you must be uncorking she must be uncorking we must be uncorking you must be uncorking they must be uncorking
Perfect
I must have uncorked you must have uncorked she must have uncorked we must have uncorked you must have uncorked they must have uncorked
V-ing perfect
I must have been uncorking you must have been uncorking she must have been uncorking we must have been uncorking you must have been uncorking they must have been uncorking
Negation
Simple form
I must not uncork you must not uncork she must not uncork we must not uncork you must not uncork they must not uncork
V-ing form
I must not be uncorking you must not be uncorking she must not be uncorking we must not be uncorking you must not be uncorking they must not be uncorking
Perfect
I must not have uncorked you must not have uncorked she must not have uncorked we must not have uncorked you must not have uncorked they must not have uncorked
V-ing perfect
I must not have been uncorking you must not have been uncorking she must not have been uncorking we must not have been uncorking you must not have been uncorking they must not have been uncorking
Interrogative form
Simple form
must I uncork? must you uncork? must she uncork? must we uncork? must you uncork? must they uncork?
V-ing form
must I be uncorking? must you be uncorking? must she be uncorking? must we be uncorking? must you be uncorking? must they be uncorking?
Perfect
must I have uncorked? must you have uncorked? must she have uncorked? must we have uncorked? must you have uncorked? must they have uncorked?
V-ing perfect
must I have been uncorking? must you have been uncorking? must she have been uncorking? must we have been uncorking? must you have been uncorking? must they have been uncorking?
Interro-negative form
Simple form
must I not uncork? must you not uncork? must she not uncork? must we not uncork? must you not uncork? must they not uncork?
V-ing form
must I not be uncorking? must you not be uncorking? must she not be uncorking? must we not be uncorking? must you not be uncorking? must they not be uncorking?
Perfect
must I not have uncorked? must you not have uncorked? must she not have uncorked? must we not have uncorked? must you not have uncorked? must they not have uncorked?
V-ing perfect
must I not have been uncorking? must you not have been uncorking? must she not have been uncorking? must we not have been uncorking? must you not have been uncorking? must they not have been uncorking?