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 mustn't uncork you mustn't uncork she mustn't uncork we mustn't uncork you mustn't uncork they mustn't uncork
V-ing form
I mustn't be uncorking you mustn't be uncorking she mustn't be uncorking we mustn't be uncorking you mustn't be uncorking they mustn't be uncorking
Perfect
I mustn't have uncorked you mustn't have uncorked she mustn't have uncorked we mustn't have uncorked you mustn't have uncorked they mustn't have uncorked
V-ing perfect
I mustn't have been uncorking you mustn't have been uncorking she mustn't have been uncorking we mustn't have been uncorking you mustn't have been uncorking they mustn't 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
mustn't I uncork? mustn't you uncork? mustn't she uncork? mustn't we uncork? mustn't you uncork? mustn't they uncork?
V-ing form
mustn't I be uncorking? mustn't you be uncorking? mustn't she be uncorking? mustn't we be uncorking? mustn't you be uncorking? mustn't they be uncorking?
Perfect
mustn't I have uncorked? mustn't you have uncorked? mustn't she have uncorked? mustn't we have uncorked? mustn't you have uncorked? mustn't they have uncorked?
V-ing perfect
mustn't I have been uncorking? mustn't you have been uncorking? mustn't she have been uncorking? mustn't we have been uncorking? mustn't you have been uncorking? mustn't they have been uncorking?