English verb conjugation
COULD DEFORM

Regular verb: deform - deformed - deformed

Affirmation

Simple form	V-ing form
I could deform you could deform he could deform we could deform you could deform they could deform	I could be deforming you could be deforming he could be deforming we could be deforming you could be deforming they could be deforming
Perfect	V-ing perfect
I could have deformed you could have deformed he could have deformed we could have deformed you could have deformed they could have deformed	I could have been deforming you could have been deforming he could have been deforming we could have been deforming you could have been deforming they could have been deforming

Negation

Simple form	V-ing form
I couldn't deform you couldn't deform he couldn't deform we couldn't deform you couldn't deform they couldn't deform	I couldn't be deforming you couldn't be deforming he couldn't be deforming we couldn't be deforming you couldn't be deforming they couldn't be deforming
Perfect	V-ing perfect
I couldn't have deformed you couldn't have deformed he couldn't have deformed we couldn't have deformed you couldn't have deformed they couldn't have deformed	I couldn't have been deforming you couldn't have been deforming he couldn't have been deforming we couldn't have been deforming you couldn't have been deforming they couldn't have been deforming

Interrogative form

Simple form	V-ing form
could I deform? could you deform? could he deform? could we deform? could you deform? could they deform?	could I be deforming? could you be deforming? could he be deforming? could we be deforming? could you be deforming? could they be deforming?
Perfect	V-ing perfect
could I have deformed? could you have deformed? could he have deformed? could we have deformed? could you have deformed? could they have deformed?	could I have been deforming? could you have been deforming? could he have been deforming? could we have been deforming? could you have been deforming? could they have been deforming?

Interro-negative form

Simple form	V-ing form
couldn't I deform? couldn't you deform? couldn't he deform? couldn't we deform? couldn't you deform? couldn't they deform?	couldn't I be deforming? couldn't you be deforming? couldn't he be deforming? couldn't we be deforming? couldn't you be deforming? couldn't they be deforming?
Perfect	V-ing perfect
couldn't I have deformed? couldn't you have deformed? couldn't he have deformed? couldn't we have deformed? couldn't you have deformed? couldn't they have deformed?	couldn't I have been deforming? couldn't you have been deforming? couldn't he have been deforming? couldn't we have been deforming? couldn't you have been deforming? couldn't they have been deforming?