English verb conjugation
COULD TERRAFORM

Regular verb: terraform - terraformed - terraformed

Affirmation

Simple form	V-ing form
I could terraform you could terraform he could terraform we could terraform you could terraform they could terraform	I could be terraforming you could be terraforming he could be terraforming we could be terraforming you could be terraforming they could be terraforming
Perfect	V-ing perfect
I could have terraformed you could have terraformed he could have terraformed we could have terraformed you could have terraformed they could have terraformed	I could have been terraforming you could have been terraforming he could have been terraforming we could have been terraforming you could have been terraforming they could have been terraforming

Negation

Simple form	V-ing form
I couldn't terraform you couldn't terraform he couldn't terraform we couldn't terraform you couldn't terraform they couldn't terraform	I couldn't be terraforming you couldn't be terraforming he couldn't be terraforming we couldn't be terraforming you couldn't be terraforming they couldn't be terraforming
Perfect	V-ing perfect
I couldn't have terraformed you couldn't have terraformed he couldn't have terraformed we couldn't have terraformed you couldn't have terraformed they couldn't have terraformed	I couldn't have been terraforming you couldn't have been terraforming he couldn't have been terraforming we couldn't have been terraforming you couldn't have been terraforming they couldn't have been terraforming

Interrogative form

Simple form	V-ing form
could I terraform? could you terraform? could he terraform? could we terraform? could you terraform? could they terraform?	could I be terraforming? could you be terraforming? could he be terraforming? could we be terraforming? could you be terraforming? could they be terraforming?
Perfect	V-ing perfect
could I have terraformed? could you have terraformed? could he have terraformed? could we have terraformed? could you have terraformed? could they have terraformed?	could I have been terraforming? could you have been terraforming? could he have been terraforming? could we have been terraforming? could you have been terraforming? could they have been terraforming?

Interro-negative form

Simple form	V-ing form
couldn't I terraform? couldn't you terraform? couldn't he terraform? couldn't we terraform? couldn't you terraform? couldn't they terraform?	couldn't I be terraforming? couldn't you be terraforming? couldn't he be terraforming? couldn't we be terraforming? couldn't you be terraforming? couldn't they be terraforming?
Perfect	V-ing perfect
couldn't I have terraformed? couldn't you have terraformed? couldn't he have terraformed? couldn't we have terraformed? couldn't you have terraformed? couldn't they have terraformed?	couldn't I have been terraforming? couldn't you have been terraforming? couldn't he have been terraforming? couldn't we have been terraforming? couldn't you have been terraforming? couldn't they have been terraforming?