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