I must wince you must wince he must wince we must wince you must wince they must wince
V-ing form
I must be wincing you must be wincing he must be wincing we must be wincing you must be wincing they must be wincing
Perfect
I must have winced you must have winced he must have winced we must have winced you must have winced they must have winced
V-ing perfect
I must have been wincing you must have been wincing he must have been wincing we must have been wincing you must have been wincing they must have been wincing
Negation
Simple form
I mustn't wince you mustn't wince he mustn't wince we mustn't wince you mustn't wince they mustn't wince
V-ing form
I mustn't be wincing you mustn't be wincing he mustn't be wincing we mustn't be wincing you mustn't be wincing they mustn't be wincing
Perfect
I mustn't have winced you mustn't have winced he mustn't have winced we mustn't have winced you mustn't have winced they mustn't have winced
V-ing perfect
I mustn't have been wincing you mustn't have been wincing he mustn't have been wincing we mustn't have been wincing you mustn't have been wincing they mustn't have been wincing
Interrogative form
Simple form
must I wince? must you wince? must he wince? must we wince? must you wince? must they wince?
V-ing form
must I be wincing? must you be wincing? must he be wincing? must we be wincing? must you be wincing? must they be wincing?
Perfect
must I have winced? must you have winced? must he have winced? must we have winced? must you have winced? must they have winced?
V-ing perfect
must I have been wincing? must you have been wincing? must he have been wincing? must we have been wincing? must you have been wincing? must they have been wincing?
Interro-negative form
Simple form
mustn't I wince? mustn't you wince? mustn't he wince? mustn't we wince? mustn't you wince? mustn't they wince?
V-ing form
mustn't I be wincing? mustn't you be wincing? mustn't he be wincing? mustn't we be wincing? mustn't you be wincing? mustn't they be wincing?
Perfect
mustn't I have winced? mustn't you have winced? mustn't he have winced? mustn't we have winced? mustn't you have winced? mustn't they have winced?
V-ing perfect
mustn't I have been wincing? mustn't you have been wincing? mustn't he have been wincing? mustn't we have been wincing? mustn't you have been wincing? mustn't they have been wincing?