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