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