can hijack
Regular verb: hijack - hijacked- hijacked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can hijack
you can hijack
he can hijack
we can hijack
you can hijack
they can hijack 	I can be hijacking
you can be hijacking
he can be hijacking
we can be hijacking
you can be hijacking
they can be hijacking	I can have hijacked
you can have hijacked
he can have hijacked
we can have hijacked
you can have hijacked
they can have hijacked	I can have been hijacking
you can have been hijacking
he can have been hijacking
we can have been hijacking
you can have been hijacking
they can have been hijacking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot hijack
you cannot hijack
he cannot hijack
we cannot hijack
you cannot hijack
they cannot hijack 	I cannot be hijacking
you cannot be hijacking
he cannot be hijacking
we cannot be hijacking
you cannot be hijacking
they cannot be hijacking	I cannot have hijacked
you cannot have hijacked
he cannot have hijacked
we cannot have hijacked
you cannot have hijacked
they cannot have hijacked	I cannot have been hijacking
you cannot have been hijacking
he cannot have been hijacking
we cannot have been hijacking
you cannot have been hijacking
they cannot have been hijacking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I hijack?
can you hijack?
can he hijack?
can we hijack?
can you hijack?
can they hijack? 	can I be hijacking?
can you be hijacking?
can he be hijacking?
can we be hijacking?
can you be hijacking?
can they be hijacking? 	can I have hijacked?
can you have hijacked?
can he have hijacked?
can we have hijacked?
can you have hijacked?
can they have hijacked? 	can I have been hijacking?
can you have been hijacking?
can he have been hijacking?
can we have been hijacking?
can you have been hijacking?
can they have been hijacking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not hijack?
can you not hijack?
can he not hijack?
can we not hijack?
can you not hijack?
can they not hijack? 	can I not be hijacking?
can you not be hijacking?
can he not be hijacking?
can we not be hijacking?
can you not be hijacking?
can they not be hijacking? 	can I not have hijacked?
can you not have hijacked?
can he not have hijacked?
can we not have hijacked?
can you not have hijacked?
can they not have hijacked? 	can I not have been hijacking?
can you not have been hijacking?
can he not have been hijacking?
can we not have been hijacking?
can you not have been hijacking?
can they not have been hijacking?