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