could parasitise
Regular verb: parasitise - parasitised- parasitised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could parasitise
you could parasitise
he could parasitise
we could parasitise
you could parasitise
they could parasitise 	I could be parasitising
you could be parasitising
he could be parasitising
we could be parasitising
you could be parasitising
they could be parasitising	I could have parasitised
you could have parasitised
he could have parasitised
we could have parasitised
you could have parasitised
they could have parasitised	I could have been parasitising
you could have been parasitising
he could have been parasitising
we could have been parasitising
you could have been parasitising
they could have been parasitising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't parasitise
you couldn't parasitise
he couldn't parasitise
we couldn't parasitise
you couldn't parasitise
they couldn't parasitise 	I couldn't be parasitising
you couldn't be parasitising
he couldn't be parasitising
we couldn't be parasitising
you couldn't be parasitising
they couldn't be parasitising	I couldn't have parasitised
you couldn't have parasitised
he couldn't have parasitised
we couldn't have parasitised
you couldn't have parasitised
they couldn't have parasitised	I couldn't have been parasitising
you couldn't have been parasitising
he couldn't have been parasitising
we couldn't have been parasitising
you couldn't have been parasitising
they couldn't have been parasitising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I parasitise?
could you parasitise?
could he parasitise?
could we parasitise?
could you parasitise?
could they parasitise? 	could I be parasitising?
could you be parasitising?
could he be parasitising?
could we be parasitising?
could you be parasitising?
could they be parasitising? 	could I have parasitised?
could you have parasitised?
could he have parasitised?
could we have parasitised?
could you have parasitised?
could they have parasitised? 	could I have been parasitising?
could you have been parasitising?
could he have been parasitising?
could we have been parasitising?
could you have been parasitising?
could they have been parasitising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I parasitise?
couldn't you parasitise?
couldn't he parasitise?
couldn't we parasitise?
couldn't you parasitise?
couldn't they parasitise? 	couldn't I be parasitising?
couldn't you be parasitising?
couldn't he be parasitising?
couldn't we be parasitising?
couldn't you be parasitising?
couldn't they be parasitising? 	couldn't I have parasitised?
couldn't you have parasitised?
couldn't he have parasitised?
couldn't we have parasitised?
couldn't you have parasitised?
couldn't they have parasitised? 	couldn't I have been parasitising?
couldn't you have been parasitising?
couldn't he have been parasitising?
couldn't we have been parasitising?
couldn't you have been parasitising?
couldn't they have been parasitising?