could passivise
Regular verb: passivise - passivised- passivised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could passivise
you could passivise
he could passivise
we could passivise
you could passivise
they could passivise 	I could be passivising
you could be passivising
he could be passivising
we could be passivising
you could be passivising
they could be passivising	I could have passivised
you could have passivised
he could have passivised
we could have passivised
you could have passivised
they could have passivised	I could have been passivising
you could have been passivising
he could have been passivising
we could have been passivising
you could have been passivising
they could have been passivising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't passivise
you couldn't passivise
he couldn't passivise
we couldn't passivise
you couldn't passivise
they couldn't passivise 	I couldn't be passivising
you couldn't be passivising
he couldn't be passivising
we couldn't be passivising
you couldn't be passivising
they couldn't be passivising	I couldn't have passivised
you couldn't have passivised
he couldn't have passivised
we couldn't have passivised
you couldn't have passivised
they couldn't have passivised	I couldn't have been passivising
you couldn't have been passivising
he couldn't have been passivising
we couldn't have been passivising
you couldn't have been passivising
they couldn't have been passivising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I passivise?
could you passivise?
could he passivise?
could we passivise?
could you passivise?
could they passivise? 	could I be passivising?
could you be passivising?
could he be passivising?
could we be passivising?
could you be passivising?
could they be passivising? 	could I have passivised?
could you have passivised?
could he have passivised?
could we have passivised?
could you have passivised?
could they have passivised? 	could I have been passivising?
could you have been passivising?
could he have been passivising?
could we have been passivising?
could you have been passivising?
could they have been passivising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I passivise?
couldn't you passivise?
couldn't he passivise?
couldn't we passivise?
couldn't you passivise?
couldn't they passivise? 	couldn't I be passivising?
couldn't you be passivising?
couldn't he be passivising?
couldn't we be passivising?
couldn't you be passivising?
couldn't they be passivising? 	couldn't I have passivised?
couldn't you have passivised?
couldn't he have passivised?
couldn't we have passivised?
couldn't you have passivised?
couldn't they have passivised? 	couldn't I have been passivising?
couldn't you have been passivising?
couldn't he have been passivising?
couldn't we have been passivising?
couldn't you have been passivising?
couldn't they have been passivising?