could passivate
Regular verb: passivate - passivated- passivated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could passivate
you could passivate
he could passivate
we could passivate
you could passivate
they could passivate 	I could be passivating
you could be passivating
he could be passivating
we could be passivating
you could be passivating
they could be passivating	I could have passivated
you could have passivated
he could have passivated
we could have passivated
you could have passivated
they could have passivated	I could have been passivating
you could have been passivating
he could have been passivating
we could have been passivating
you could have been passivating
they could have been passivating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't passivate
you couldn't passivate
he couldn't passivate
we couldn't passivate
you couldn't passivate
they couldn't passivate 	I couldn't be passivating
you couldn't be passivating
he couldn't be passivating
we couldn't be passivating
you couldn't be passivating
they couldn't be passivating	I couldn't have passivated
you couldn't have passivated
he couldn't have passivated
we couldn't have passivated
you couldn't have passivated
they couldn't have passivated	I couldn't have been passivating
you couldn't have been passivating
he couldn't have been passivating
we couldn't have been passivating
you couldn't have been passivating
they couldn't have been passivating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I passivate?
could you passivate?
could he passivate?
could we passivate?
could you passivate?
could they passivate? 	could I be passivating?
could you be passivating?
could he be passivating?
could we be passivating?
could you be passivating?
could they be passivating? 	could I have passivated?
could you have passivated?
could he have passivated?
could we have passivated?
could you have passivated?
could they have passivated? 	could I have been passivating?
could you have been passivating?
could he have been passivating?
could we have been passivating?
could you have been passivating?
could they have been passivating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I passivate?
couldn't you passivate?
couldn't he passivate?
couldn't we passivate?
couldn't you passivate?
couldn't they passivate? 	couldn't I be passivating?
couldn't you be passivating?
couldn't he be passivating?
couldn't we be passivating?
couldn't you be passivating?
couldn't they be passivating? 	couldn't I have passivated?
couldn't you have passivated?
couldn't he have passivated?
couldn't we have passivated?
couldn't you have passivated?
couldn't they have passivated? 	couldn't I have been passivating?
couldn't you have been passivating?
couldn't he have been passivating?
couldn't we have been passivating?
couldn't you have been passivating?
couldn't they have been passivating?