I must unlearn you must unlearn she must unlearn we must unlearn you must unlearn they must unlearn
V-ing form
I must be unlearning you must be unlearning she must be unlearning we must be unlearning you must be unlearning they must be unlearning
Perfect
I must have unlearned you must have unlearned she must have unlearned we must have unlearned you must have unlearned they must have unlearned
V-ing perfect
I must have been unlearning you must have been unlearning she must have been unlearning we must have been unlearning you must have been unlearning they must have been unlearning
Negation
Simple form
I mustn't unlearn you mustn't unlearn she mustn't unlearn we mustn't unlearn you mustn't unlearn they mustn't unlearn
V-ing form
I mustn't be unlearning you mustn't be unlearning she mustn't be unlearning we mustn't be unlearning you mustn't be unlearning they mustn't be unlearning
Perfect
I mustn't have unlearned you mustn't have unlearned she mustn't have unlearned we mustn't have unlearned you mustn't have unlearned they mustn't have unlearned
V-ing perfect
I mustn't have been unlearning you mustn't have been unlearning she mustn't have been unlearning we mustn't have been unlearning you mustn't have been unlearning they mustn't have been unlearning
Interrogative form
Simple form
must I unlearn? must you unlearn? must she unlearn? must we unlearn? must you unlearn? must they unlearn?
V-ing form
must I be unlearning? must you be unlearning? must she be unlearning? must we be unlearning? must you be unlearning? must they be unlearning?
Perfect
must I have unlearned? must you have unlearned? must she have unlearned? must we have unlearned? must you have unlearned? must they have unlearned?
V-ing perfect
must I have been unlearning? must you have been unlearning? must she have been unlearning? must we have been unlearning? must you have been unlearning? must they have been unlearning?
Interro-negative form
Simple form
mustn't I unlearn? mustn't you unlearn? mustn't she unlearn? mustn't we unlearn? mustn't you unlearn? mustn't they unlearn?
V-ing form
mustn't I be unlearning? mustn't you be unlearning? mustn't she be unlearning? mustn't we be unlearning? mustn't you be unlearning? mustn't they be unlearning?
Perfect
mustn't I have unlearned? mustn't you have unlearned? mustn't she have unlearned? mustn't we have unlearned? mustn't you have unlearned? mustn't they have unlearned?
V-ing perfect
mustn't I have been unlearning? mustn't you have been unlearning? mustn't she have been unlearning? mustn't we have been unlearning? mustn't you have been unlearning? mustn't they have been unlearning?