could plagiarize
Regular verb: plagiarize - plagiarized- plagiarized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could plagiarize
you could plagiarize
he could plagiarize
we could plagiarize
you could plagiarize
they could plagiarize 	I could be plagiarizing
you could be plagiarizing
he could be plagiarizing
we could be plagiarizing
you could be plagiarizing
they could be plagiarizing	I could have plagiarized
you could have plagiarized
he could have plagiarized
we could have plagiarized
you could have plagiarized
they could have plagiarized	I could have been plagiarizing
you could have been plagiarizing
he could have been plagiarizing
we could have been plagiarizing
you could have been plagiarizing
they could have been plagiarizing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not plagiarize
you could not plagiarize
he could not plagiarize
we could not plagiarize
you could not plagiarize
they could not plagiarize 	I could not be plagiarizing
you could not be plagiarizing
he could not be plagiarizing
we could not be plagiarizing
you could not be plagiarizing
they could not be plagiarizing	I could not have plagiarized
you could not have plagiarized
he could not have plagiarized
we could not have plagiarized
you could not have plagiarized
they could not have plagiarized	I could not have been plagiarizing
you could not have been plagiarizing
he could not have been plagiarizing
we could not have been plagiarizing
you could not have been plagiarizing
they could not have been plagiarizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I plagiarize?
could you plagiarize?
could he plagiarize?
could we plagiarize?
could you plagiarize?
could they plagiarize? 	could I be plagiarizing?
could you be plagiarizing?
could he be plagiarizing?
could we be plagiarizing?
could you be plagiarizing?
could they be plagiarizing? 	could I have plagiarized?
could you have plagiarized?
could he have plagiarized?
could we have plagiarized?
could you have plagiarized?
could they have plagiarized? 	could I have been plagiarizing?
could you have been plagiarizing?
could he have been plagiarizing?
could we have been plagiarizing?
could you have been plagiarizing?
could they have been plagiarizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not plagiarize?
could you not plagiarize?
could he not plagiarize?
could we not plagiarize?
could you not plagiarize?
could they not plagiarize? 	could I not be plagiarizing?
could you not be plagiarizing?
could he not be plagiarizing?
could we not be plagiarizing?
could you not be plagiarizing?
could they not be plagiarizing? 	could I not have plagiarized?
could you not have plagiarized?
could he not have plagiarized?
could we not have plagiarized?
could you not have plagiarized?
could they not have plagiarized? 	could I not have been plagiarizing?
could you not have been plagiarizing?
could he not have been plagiarizing?
could we not have been plagiarizing?
could you not have been plagiarizing?
could they not have been plagiarizing?