Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could hijack hijack you could hijack hijack she could hijack hijack we could hijack hijack you could hijack hijack they could hijack hijack
V-ing form
I could be hijack hijacking you could be hijack hijacking she could be hijack hijacking we could be hijack hijacking you could be hijack hijacking they could be hijack hijacking
Perfect
I could have hijack hijacked you could have hijack hijacked she could have hijack hijacked we could have hijack hijacked you could have hijack hijacked they could have hijack hijacked
V-ing perfect
I could have been hijack hijacking you could have been hijack hijacking she could have been hijack hijacking we could have been hijack hijacking you could have been hijack hijacking they could have been hijack hijacking
Negation
Simple form
I could not hijack hijack you could not hijack hijack she could not hijack hijack we could not hijack hijack you could not hijack hijack they could not hijack hijack
V-ing form
I could not be hijack hijacking you could not be hijack hijacking she could not be hijack hijacking we could not be hijack hijacking you could not be hijack hijacking they could not be hijack hijacking
Perfect
I could not have hijack hijacked you could not have hijack hijacked she could not have hijack hijacked we could not have hijack hijacked you could not have hijack hijacked they could not have hijack hijacked
V-ing perfect
I could not have been hijack hijacking you could not have been hijack hijacking she could not have been hijack hijacking we could not have been hijack hijacking you could not have been hijack hijacking they could not have been hijack hijacking
Interrogative form
Simple form
could I hijack hijack? could you hijack hijack? could she hijack hijack? could we hijack hijack? could you hijack hijack? could they hijack hijack?
V-ing form
could I be hijack hijacking? could you be hijack hijacking? could she be hijack hijacking? could we be hijack hijacking? could you be hijack hijacking? could they be hijack hijacking?
Perfect
could I have hijack hijacked? could you have hijack hijacked? could she have hijack hijacked? could we have hijack hijacked? could you have hijack hijacked? could they have hijack hijacked?
V-ing perfect
could I have been hijack hijacking? could you have been hijack hijacking? could she have been hijack hijacking? could we have been hijack hijacking? could you have been hijack hijacking? could they have been hijack hijacking?
Interro-negative form
Simple form
could I not hijack hijack? could you not hijack hijack? could she not hijack hijack? could we not hijack hijack? could you not hijack hijack? could they not hijack hijack?
V-ing form
could I not be hijack hijacking? could you not be hijack hijacking? could she not be hijack hijacking? could we not be hijack hijacking? could you not be hijack hijacking? could they not be hijack hijacking?
Perfect
could I not have hijack hijacked? could you not have hijack hijacked? could she not have hijack hijacked? could we not have hijack hijacked? could you not have hijack hijacked? could they not have hijack hijacked?
V-ing perfect
could I not have been hijack hijacking? could you not have been hijack hijacking? could she not have been hijack hijacking? could we not have been hijack hijacking? could you not have been hijack hijacking? could they not have been hijack hijacking?