English verb conjugation
COULD THERMOFORM

Regular verb: thermoform - thermoformed - thermoformed

Affirmation

Simple form	V-ing form
I could thermoform you could thermoform he could thermoform we could thermoform you could thermoform they could thermoform	I could be thermoforming you could be thermoforming he could be thermoforming we could be thermoforming you could be thermoforming they could be thermoforming
Perfect	V-ing perfect
I could have thermoformed you could have thermoformed he could have thermoformed we could have thermoformed you could have thermoformed they could have thermoformed	I could have been thermoforming you could have been thermoforming he could have been thermoforming we could have been thermoforming you could have been thermoforming they could have been thermoforming

Negation

Simple form	V-ing form
I couldn't thermoform you couldn't thermoform he couldn't thermoform we couldn't thermoform you couldn't thermoform they couldn't thermoform	I couldn't be thermoforming you couldn't be thermoforming he couldn't be thermoforming we couldn't be thermoforming you couldn't be thermoforming they couldn't be thermoforming
Perfect	V-ing perfect
I couldn't have thermoformed you couldn't have thermoformed he couldn't have thermoformed we couldn't have thermoformed you couldn't have thermoformed they couldn't have thermoformed	I couldn't have been thermoforming you couldn't have been thermoforming he couldn't have been thermoforming we couldn't have been thermoforming you couldn't have been thermoforming they couldn't have been thermoforming

Interrogative form

Simple form	V-ing form
could I thermoform? could you thermoform? could he thermoform? could we thermoform? could you thermoform? could they thermoform?	could I be thermoforming? could you be thermoforming? could he be thermoforming? could we be thermoforming? could you be thermoforming? could they be thermoforming?
Perfect	V-ing perfect
could I have thermoformed? could you have thermoformed? could he have thermoformed? could we have thermoformed? could you have thermoformed? could they have thermoformed?	could I have been thermoforming? could you have been thermoforming? could he have been thermoforming? could we have been thermoforming? could you have been thermoforming? could they have been thermoforming?

Interro-negative form

Simple form	V-ing form
couldn't I thermoform? couldn't you thermoform? couldn't he thermoform? couldn't we thermoform? couldn't you thermoform? couldn't they thermoform?	couldn't I be thermoforming? couldn't you be thermoforming? couldn't he be thermoforming? couldn't we be thermoforming? couldn't you be thermoforming? couldn't they be thermoforming?
Perfect	V-ing perfect
couldn't I have thermoformed? couldn't you have thermoformed? couldn't he have thermoformed? couldn't we have thermoformed? couldn't you have thermoformed? couldn't they have thermoformed?	couldn't I have been thermoforming? couldn't you have been thermoforming? couldn't he have been thermoforming? couldn't we have been thermoforming? couldn't you have been thermoforming? couldn't they have been thermoforming?