I could enhance you could enhance he could enhance we could enhance you could enhance they could enhance
Forme en V-ing
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
I could have enhanced you could have enhanced he could have enhanced we could have enhanced you could have enhanced they could have enhanced
Perfect en V-ing
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
Négation
Forme simple
I couldn't enhance you couldn't enhance he couldn't enhance we couldn't enhance you couldn't enhance they couldn't enhance
Forme en V-ing
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
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
Perfect en V-ing
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
Forme interrogative
Forme simple
could I enhance? could you enhance? could he enhance? could we enhance? could you enhance? could they enhance?
Forme en V-ing
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
could I have enhanced? could you have enhanced? could he have enhanced? could we have enhanced? could you have enhanced? could they have enhanced?
Perfect en V-ing
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?
Forme interro-négative
Forme simple
couldn't I enhance? couldn't you enhance? couldn't he enhance? couldn't we enhance? couldn't you enhance? couldn't they enhance?
Forme en V-ing
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
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?
Perfect en V-ing
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?