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