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