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