could fibrillate
Regular verb: fibrillate - fibrillated- fibrillated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could fibrillate
you could fibrillate
he could fibrillate
we could fibrillate
you could fibrillate
they could fibrillate 	I could be fibrillating
you could be fibrillating
he could be fibrillating
we could be fibrillating
you could be fibrillating
they could be fibrillating	I could have fibrillated
you could have fibrillated
he could have fibrillated
we could have fibrillated
you could have fibrillated
they could have fibrillated	I could have been fibrillating
you could have been fibrillating
he could have been fibrillating
we could have been fibrillating
you could have been fibrillating
they could have been fibrillating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not fibrillate
you could not fibrillate
he could not fibrillate
we could not fibrillate
you could not fibrillate
they could not fibrillate 	I could not be fibrillating
you could not be fibrillating
he could not be fibrillating
we could not be fibrillating
you could not be fibrillating
they could not be fibrillating	I could not have fibrillated
you could not have fibrillated
he could not have fibrillated
we could not have fibrillated
you could not have fibrillated
they could not have fibrillated	I could not have been fibrillating
you could not have been fibrillating
he could not have been fibrillating
we could not have been fibrillating
you could not have been fibrillating
they could not have been fibrillating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I fibrillate?
could you fibrillate?
could he fibrillate?
could we fibrillate?
could you fibrillate?
could they fibrillate? 	could I be fibrillating?
could you be fibrillating?
could he be fibrillating?
could we be fibrillating?
could you be fibrillating?
could they be fibrillating? 	could I have fibrillated?
could you have fibrillated?
could he have fibrillated?
could we have fibrillated?
could you have fibrillated?
could they have fibrillated? 	could I have been fibrillating?
could you have been fibrillating?
could he have been fibrillating?
could we have been fibrillating?
could you have been fibrillating?
could they have been fibrillating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not fibrillate?
could you not fibrillate?
could he not fibrillate?
could we not fibrillate?
could you not fibrillate?
could they not fibrillate? 	could I not be fibrillating?
could you not be fibrillating?
could he not be fibrillating?
could we not be fibrillating?
could you not be fibrillating?
could they not be fibrillating? 	could I not have fibrillated?
could you not have fibrillated?
could he not have fibrillated?
could we not have fibrillated?
could you not have fibrillated?
could they not have fibrillated? 	could I not have been fibrillating?
could you not have been fibrillating?
could he not have been fibrillating?
could we not have been fibrillating?
could you not have been fibrillating?
could they not have been fibrillating?