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 must not hijack you must not hijack he must not hijack we must not hijack you must not hijack they must not hijack
V-ing form
I must not be hijacking you must not be hijacking he must not be hijacking we must not be hijacking you must not be hijacking they must not be hijacking
Perfect
I must not have hijacked you must not have hijacked he must not have hijacked we must not have hijacked you must not have hijacked they must not have hijacked
V-ing perfect
I must not have been hijacking you must not have been hijacking he must not have been hijacking we must not have been hijacking you must not have been hijacking they must not 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
must I not hijack? must you not hijack? must he not hijack? must we not hijack? must you not hijack? must they not hijack?
V-ing form
must I not be hijacking? must you not be hijacking? must he not be hijacking? must we not be hijacking? must you not be hijacking? must they not be hijacking?
Perfect
must I not have hijacked? must you not have hijacked? must he not have hijacked? must we not have hijacked? must you not have hijacked? must they not have hijacked?
V-ing perfect
must I not have been hijacking? must you not have been hijacking? must he not have been hijacking? must we not have been hijacking? must you not have been hijacking? must they not have been hijacking?