I could window you could window she could window we could window you could window they could window
Forme en V-ing
I could be windowing you could be windowing she could be windowing we could be windowing you could be windowing they could be windowing
Perfect
I could have windowed you could have windowed she could have windowed we could have windowed you could have windowed they could have windowed
Perfect en V-ing
I could have been windowing you could have been windowing she could have been windowing we could have been windowing you could have been windowing they could have been windowing
Négation
Forme simple
I could not window you could not window she could not window we could not window you could not window they could not window
Forme en V-ing
I could not be windowing you could not be windowing she could not be windowing we could not be windowing you could not be windowing they could not be windowing
Perfect
I could not have windowed you could not have windowed she could not have windowed we could not have windowed you could not have windowed they could not have windowed
Perfect en V-ing
I could not have been windowing you could not have been windowing she could not have been windowing we could not have been windowing you could not have been windowing they could not have been windowing
Forme interrogative
Forme simple
could I window? could you window? could she window? could we window? could you window? could they window?
Forme en V-ing
could I be windowing? could you be windowing? could she be windowing? could we be windowing? could you be windowing? could they be windowing?
Perfect
could I have windowed? could you have windowed? could she have windowed? could we have windowed? could you have windowed? could they have windowed?
Perfect en V-ing
could I have been windowing? could you have been windowing? could she have been windowing? could we have been windowing? could you have been windowing? could they have been windowing?
Forme interro-négative
Forme simple
could I not window? could you not window? could she not window? could we not window? could you not window? could they not window?
Forme en V-ing
could I not be windowing? could you not be windowing? could she not be windowing? could we not be windowing? could you not be windowing? could they not be windowing?
Perfect
could I not have windowed? could you not have windowed? could she not have windowed? could we not have windowed? could you not have windowed? could they not have windowed?
Perfect en V-ing
could I not have been windowing? could you not have been windowing? could she not have been windowing? could we not have been windowing? could you not have been windowing? could they not have been windowing?