English verb conjugation
COULD DEFIBRINATE

Regular verb: defibrinate - defibrinated - defibrinated

Affirmation

Simple form	V-ing form
I could defibrinate you could defibrinate he could defibrinate we could defibrinate you could defibrinate they could defibrinate	I could be defibrinating you could be defibrinating he could be defibrinating we could be defibrinating you could be defibrinating they could be defibrinating
Perfect	V-ing perfect
I could have defibrinated you could have defibrinated he could have defibrinated we could have defibrinated you could have defibrinated they could have defibrinated	I could have been defibrinating you could have been defibrinating he could have been defibrinating we could have been defibrinating you could have been defibrinating they could have been defibrinating

Negation

Simple form	V-ing form
I couldn't defibrinate you couldn't defibrinate he couldn't defibrinate we couldn't defibrinate you couldn't defibrinate they couldn't defibrinate	I couldn't be defibrinating you couldn't be defibrinating he couldn't be defibrinating we couldn't be defibrinating you couldn't be defibrinating they couldn't be defibrinating
Perfect	V-ing perfect
I couldn't have defibrinated you couldn't have defibrinated he couldn't have defibrinated we couldn't have defibrinated you couldn't have defibrinated they couldn't have defibrinated	I couldn't have been defibrinating you couldn't have been defibrinating he couldn't have been defibrinating we couldn't have been defibrinating you couldn't have been defibrinating they couldn't have been defibrinating

Interrogative form

Simple form	V-ing form
could I defibrinate? could you defibrinate? could he defibrinate? could we defibrinate? could you defibrinate? could they defibrinate?	could I be defibrinating? could you be defibrinating? could he be defibrinating? could we be defibrinating? could you be defibrinating? could they be defibrinating?
Perfect	V-ing perfect
could I have defibrinated? could you have defibrinated? could he have defibrinated? could we have defibrinated? could you have defibrinated? could they have defibrinated?	could I have been defibrinating? could you have been defibrinating? could he have been defibrinating? could we have been defibrinating? could you have been defibrinating? could they have been defibrinating?

Interro-negative form

Simple form	V-ing form
couldn't I defibrinate? couldn't you defibrinate? couldn't he defibrinate? couldn't we defibrinate? couldn't you defibrinate? couldn't they defibrinate?	couldn't I be defibrinating? couldn't you be defibrinating? couldn't he be defibrinating? couldn't we be defibrinating? couldn't you be defibrinating? couldn't they be defibrinating?
Perfect	V-ing perfect
couldn't I have defibrinated? couldn't you have defibrinated? couldn't he have defibrinated? couldn't we have defibrinated? couldn't you have defibrinated? couldn't they have defibrinated?	couldn't I have been defibrinating? couldn't you have been defibrinating? couldn't he have been defibrinating? couldn't we have been defibrinating? couldn't you have been defibrinating? couldn't they have been defibrinating?