could parasitize
Regular verb: parasitize - parasitized- parasitized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could parasitize
you could parasitize
he could parasitize
we could parasitize
you could parasitize
they could parasitize 	I could be parasitizing
you could be parasitizing
he could be parasitizing
we could be parasitizing
you could be parasitizing
they could be parasitizing	I could have parasitized
you could have parasitized
he could have parasitized
we could have parasitized
you could have parasitized
they could have parasitized	I could have been parasitizing
you could have been parasitizing
he could have been parasitizing
we could have been parasitizing
you could have been parasitizing
they could have been parasitizing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not parasitize
you could not parasitize
he could not parasitize
we could not parasitize
you could not parasitize
they could not parasitize 	I could not be parasitizing
you could not be parasitizing
he could not be parasitizing
we could not be parasitizing
you could not be parasitizing
they could not be parasitizing	I could not have parasitized
you could not have parasitized
he could not have parasitized
we could not have parasitized
you could not have parasitized
they could not have parasitized	I could not have been parasitizing
you could not have been parasitizing
he could not have been parasitizing
we could not have been parasitizing
you could not have been parasitizing
they could not have been parasitizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I parasitize?
could you parasitize?
could he parasitize?
could we parasitize?
could you parasitize?
could they parasitize? 	could I be parasitizing?
could you be parasitizing?
could he be parasitizing?
could we be parasitizing?
could you be parasitizing?
could they be parasitizing? 	could I have parasitized?
could you have parasitized?
could he have parasitized?
could we have parasitized?
could you have parasitized?
could they have parasitized? 	could I have been parasitizing?
could you have been parasitizing?
could he have been parasitizing?
could we have been parasitizing?
could you have been parasitizing?
could they have been parasitizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not parasitize?
could you not parasitize?
could he not parasitize?
could we not parasitize?
could you not parasitize?
could they not parasitize? 	could I not be parasitizing?
could you not be parasitizing?
could he not be parasitizing?
could we not be parasitizing?
could you not be parasitizing?
could they not be parasitizing? 	could I not have parasitized?
could you not have parasitized?
could he not have parasitized?
could we not have parasitized?
could you not have parasitized?
could they not have parasitized? 	could I not have been parasitizing?
could you not have been parasitizing?
could he not have been parasitizing?
could we not have been parasitizing?
could you not have been parasitizing?
could they not have been parasitizing?