I could lower you could lower he could lower we could lower you could lower they could lower
Forme en V-ing
I could be lowering you could be lowering he could be lowering we could be lowering you could be lowering they could be lowering
Perfect
I could have lowered you could have lowered he could have lowered we could have lowered you could have lowered they could have lowered
Perfect en V-ing
I could have been lowering you could have been lowering he could have been lowering we could have been lowering you could have been lowering they could have been lowering
Négation
Forme simple
I couldn't lower you couldn't lower he couldn't lower we couldn't lower you couldn't lower they couldn't lower
Forme en V-ing
I couldn't be lowering you couldn't be lowering he couldn't be lowering we couldn't be lowering you couldn't be lowering they couldn't be lowering
Perfect
I couldn't have lowered you couldn't have lowered he couldn't have lowered we couldn't have lowered you couldn't have lowered they couldn't have lowered
Perfect en V-ing
I couldn't have been lowering you couldn't have been lowering he couldn't have been lowering we couldn't have been lowering you couldn't have been lowering they couldn't have been lowering
Forme interrogative
Forme simple
could I lower? could you lower? could he lower? could we lower? could you lower? could they lower?
Forme en V-ing
could I be lowering? could you be lowering? could he be lowering? could we be lowering? could you be lowering? could they be lowering?
Perfect
could I have lowered? could you have lowered? could he have lowered? could we have lowered? could you have lowered? could they have lowered?
Perfect en V-ing
could I have been lowering? could you have been lowering? could he have been lowering? could we have been lowering? could you have been lowering? could they have been lowering?
Forme interro-négative
Forme simple
couldn't I lower? couldn't you lower? couldn't he lower? couldn't we lower? couldn't you lower? couldn't they lower?
Forme en V-ing
couldn't I be lowering? couldn't you be lowering? couldn't he be lowering? couldn't we be lowering? couldn't you be lowering? couldn't they be lowering?
Perfect
couldn't I have lowered? couldn't you have lowered? couldn't he have lowered? couldn't we have lowered? couldn't you have lowered? couldn't they have lowered?
Perfect en V-ing
couldn't I have been lowering? couldn't you have been lowering? couldn't he have been lowering? couldn't we have been lowering? couldn't you have been lowering? couldn't they have been lowering?