English verb conjugation
COULD FIBRILLATE

Regular verb: fibrillate - fibrillated - fibrillated

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
I couldn't fibrillate you couldn't fibrillate he couldn't fibrillate we couldn't fibrillate you couldn't fibrillate they couldn't fibrillate	I couldn't be fibrillating you couldn't be fibrillating he couldn't be fibrillating we couldn't be fibrillating you couldn't be fibrillating they couldn't be fibrillating
Perfect	V-ing perfect
I couldn't have fibrillated you couldn't have fibrillated he couldn't have fibrillated we couldn't have fibrillated you couldn't have fibrillated they couldn't have fibrillated	I couldn't have been fibrillating you couldn't have been fibrillating he couldn't have been fibrillating we couldn't have been fibrillating you couldn't have been fibrillating they couldn't have been fibrillating

Interrogative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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
couldn't I fibrillate? couldn't you fibrillate? couldn't he fibrillate? couldn't we fibrillate? couldn't you fibrillate? couldn't they fibrillate?	couldn't I be fibrillating? couldn't you be fibrillating? couldn't he be fibrillating? couldn't we be fibrillating? couldn't you be fibrillating? couldn't they be fibrillating?
Perfect	V-ing perfect
couldn't I have fibrillated? couldn't you have fibrillated? couldn't he have fibrillated? couldn't we have fibrillated? couldn't you have fibrillated? couldn't they have fibrillated?	couldn't I have been fibrillating? couldn't you have been fibrillating? couldn't he have been fibrillating? couldn't we have been fibrillating? couldn't you have been fibrillating? couldn't they have been fibrillating?