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