I could fork you could fork she could fork we could fork you could fork they could fork
Forme en V-ing
I could be forking you could be forking she could be forking we could be forking you could be forking they could be forking
Perfect
I could have forked you could have forked she could have forked we could have forked you could have forked they could have forked
Perfect en V-ing
I could have been forking you could have been forking she could have been forking we could have been forking you could have been forking they could have been forking
Négation
Forme simple
I could not fork you could not fork she could not fork we could not fork you could not fork they could not fork
Forme en V-ing
I could not be forking you could not be forking she could not be forking we could not be forking you could not be forking they could not be forking
Perfect
I could not have forked you could not have forked she could not have forked we could not have forked you could not have forked they could not have forked
Perfect en V-ing
I could not have been forking you could not have been forking she could not have been forking we could not have been forking you could not have been forking they could not have been forking
Forme interrogative
Forme simple
could I fork? could you fork? could she fork? could we fork? could you fork? could they fork?
Forme en V-ing
could I be forking? could you be forking? could she be forking? could we be forking? could you be forking? could they be forking?
Perfect
could I have forked? could you have forked? could she have forked? could we have forked? could you have forked? could they have forked?
Perfect en V-ing
could I have been forking? could you have been forking? could she have been forking? could we have been forking? could you have been forking? could they have been forking?
Forme interro-négative
Forme simple
could I not fork? could you not fork? could she not fork? could we not fork? could you not fork? could they not fork?
Forme en V-ing
could I not be forking? could you not be forking? could she not be forking? could we not be forking? could you not be forking? could they not be forking?
Perfect
could I not have forked? could you not have forked? could she not have forked? could we not have forked? could you not have forked? could they not have forked?
Perfect en V-ing
could I not have been forking? could you not have been forking? could she not have been forking? could we not have been forking? could you not have been forking? could they not have been forking?