English verb conjugation
COULD ENHANCE

Regular verb: enhance - enhanced - enhanced

Affirmation

Simple form	V-ing form
I could enhance you could enhance he could enhance we could enhance you could enhance they could enhance	I could be enhancing you could be enhancing he could be enhancing we could be enhancing you could be enhancing they could be enhancing
Perfect	V-ing perfect
I could have enhanced you could have enhanced he could have enhanced we could have enhanced you could have enhanced they could have enhanced	I could have been enhancing you could have been enhancing he could have been enhancing we could have been enhancing you could have been enhancing they could have been enhancing

Negation

Simple form	V-ing form
I couldn't enhance you couldn't enhance he couldn't enhance we couldn't enhance you couldn't enhance they couldn't enhance	I couldn't be enhancing you couldn't be enhancing he couldn't be enhancing we couldn't be enhancing you couldn't be enhancing they couldn't be enhancing
Perfect	V-ing perfect
I couldn't have enhanced you couldn't have enhanced he couldn't have enhanced we couldn't have enhanced you couldn't have enhanced they couldn't have enhanced	I couldn't have been enhancing you couldn't have been enhancing he couldn't have been enhancing we couldn't have been enhancing you couldn't have been enhancing they couldn't have been enhancing

Interrogative form

Simple form	V-ing form
could I enhance? could you enhance? could he enhance? could we enhance? could you enhance? could they enhance?	could I be enhancing? could you be enhancing? could he be enhancing? could we be enhancing? could you be enhancing? could they be enhancing?
Perfect	V-ing perfect
could I have enhanced? could you have enhanced? could he have enhanced? could we have enhanced? could you have enhanced? could they have enhanced?	could I have been enhancing? could you have been enhancing? could he have been enhancing? could we have been enhancing? could you have been enhancing? could they have been enhancing?

Interro-negative form

Simple form	V-ing form
couldn't I enhance? couldn't you enhance? couldn't he enhance? couldn't we enhance? couldn't you enhance? couldn't they enhance?	couldn't I be enhancing? couldn't you be enhancing? couldn't he be enhancing? couldn't we be enhancing? couldn't you be enhancing? couldn't they be enhancing?
Perfect	V-ing perfect
couldn't I have enhanced? couldn't you have enhanced? couldn't he have enhanced? couldn't we have enhanced? couldn't you have enhanced? couldn't they have enhanced?	couldn't I have been enhancing? couldn't you have been enhancing? couldn't he have been enhancing? couldn't we have been enhancing? couldn't you have been enhancing? couldn't they have been enhancing?