I could chirr you could chirr he could chirr we could chirr you could chirr they could chirr
Forme en V-ing
I could be chirring you could be chirring he could be chirring we could be chirring you could be chirring they could be chirring
Perfect
I could have chirred you could have chirred he could have chirred we could have chirred you could have chirred they could have chirred
Perfect en V-ing
I could have been chirring you could have been chirring he could have been chirring we could have been chirring you could have been chirring they could have been chirring
Négation
Forme simple
I could not chirr you could not chirr he could not chirr we could not chirr you could not chirr they could not chirr
Forme en V-ing
I could not be chirring you could not be chirring he could not be chirring we could not be chirring you could not be chirring they could not be chirring
Perfect
I could not have chirred you could not have chirred he could not have chirred we could not have chirred you could not have chirred they could not have chirred
Perfect en V-ing
I could not have been chirring you could not have been chirring he could not have been chirring we could not have been chirring you could not have been chirring they could not have been chirring
Forme interrogative
Forme simple
could I chirr? could you chirr? could he chirr? could we chirr? could you chirr? could they chirr?
Forme en V-ing
could I be chirring? could you be chirring? could he be chirring? could we be chirring? could you be chirring? could they be chirring?
Perfect
could I have chirred? could you have chirred? could he have chirred? could we have chirred? could you have chirred? could they have chirred?
Perfect en V-ing
could I have been chirring? could you have been chirring? could he have been chirring? could we have been chirring? could you have been chirring? could they have been chirring?
Forme interro-négative
Forme simple
could I not chirr? could you not chirr? could he not chirr? could we not chirr? could you not chirr? could they not chirr?
Forme en V-ing
could I not be chirring? could you not be chirring? could he not be chirring? could we not be chirring? could you not be chirring? could they not be chirring?
Perfect
could I not have chirred? could you not have chirred? could he not have chirred? could we not have chirred? could you not have chirred? could they not have chirred?
Perfect en V-ing
could I not have been chirring? could you not have been chirring? could he not have been chirring? could we not have been chirring? could you not have been chirring? could they not have been chirring?