English verb conjugation
COULD SCARF

Regular verb: scarf - scarfed - scarfed

Affirmation

Simple form	V-ing form
I could scarf you could scarf he could scarf we could scarf you could scarf they could scarf	I could be scarfing you could be scarfing he could be scarfing we could be scarfing you could be scarfing they could be scarfing
Perfect	V-ing perfect
I could have scarfed you could have scarfed he could have scarfed we could have scarfed you could have scarfed they could have scarfed	I could have been scarfing you could have been scarfing he could have been scarfing we could have been scarfing you could have been scarfing they could have been scarfing

Negation

Simple form	V-ing form
I couldn't scarf you couldn't scarf he couldn't scarf we couldn't scarf you couldn't scarf they couldn't scarf	I couldn't be scarfing you couldn't be scarfing he couldn't be scarfing we couldn't be scarfing you couldn't be scarfing they couldn't be scarfing
Perfect	V-ing perfect
I couldn't have scarfed you couldn't have scarfed he couldn't have scarfed we couldn't have scarfed you couldn't have scarfed they couldn't have scarfed	I couldn't have been scarfing you couldn't have been scarfing he couldn't have been scarfing we couldn't have been scarfing you couldn't have been scarfing they couldn't have been scarfing

Interrogative form

Simple form	V-ing form
could I scarf? could you scarf? could he scarf? could we scarf? could you scarf? could they scarf?	could I be scarfing? could you be scarfing? could he be scarfing? could we be scarfing? could you be scarfing? could they be scarfing?
Perfect	V-ing perfect
could I have scarfed? could you have scarfed? could he have scarfed? could we have scarfed? could you have scarfed? could they have scarfed?	could I have been scarfing? could you have been scarfing? could he have been scarfing? could we have been scarfing? could you have been scarfing? could they have been scarfing?

Interro-negative form

Simple form	V-ing form
couldn't I scarf? couldn't you scarf? couldn't he scarf? couldn't we scarf? couldn't you scarf? couldn't they scarf?	couldn't I be scarfing? couldn't you be scarfing? couldn't he be scarfing? couldn't we be scarfing? couldn't you be scarfing? couldn't they be scarfing?
Perfect	V-ing perfect
couldn't I have scarfed? couldn't you have scarfed? couldn't he have scarfed? couldn't we have scarfed? couldn't you have scarfed? couldn't they have scarfed?	couldn't I have been scarfing? couldn't you have been scarfing? couldn't he have been scarfing? couldn't we have been scarfing? couldn't you have been scarfing? couldn't they have been scarfing?