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