I could engage you could engage he could engage we could engage you could engage they could engage
Forme en V-ing
I could be engaging you could be engaging he could be engaging we could be engaging you could be engaging they could be engaging
Perfect
I could have engaged you could have engaged he could have engaged we could have engaged you could have engaged they could have engaged
Perfect en V-ing
I could have been engaging you could have been engaging he could have been engaging we could have been engaging you could have been engaging they could have been engaging
Négation
Forme simple
I could not engage you could not engage he could not engage we could not engage you could not engage they could not engage
Forme en V-ing
I could not be engaging you could not be engaging he could not be engaging we could not be engaging you could not be engaging they could not be engaging
Perfect
I could not have engaged you could not have engaged he could not have engaged we could not have engaged you could not have engaged they could not have engaged
Perfect en V-ing
I could not have been engaging you could not have been engaging he could not have been engaging we could not have been engaging you could not have been engaging they could not have been engaging
Forme interrogative
Forme simple
could I engage? could you engage? could he engage? could we engage? could you engage? could they engage?
Forme en V-ing
could I be engaging? could you be engaging? could he be engaging? could we be engaging? could you be engaging? could they be engaging?
Perfect
could I have engaged? could you have engaged? could he have engaged? could we have engaged? could you have engaged? could they have engaged?
Perfect en V-ing
could I have been engaging? could you have been engaging? could he have been engaging? could we have been engaging? could you have been engaging? could they have been engaging?
Forme interro-négative
Forme simple
could I not engage? could you not engage? could he not engage? could we not engage? could you not engage? could they not engage?
Forme en V-ing
could I not be engaging? could you not be engaging? could he not be engaging? could we not be engaging? could you not be engaging? could they not be engaging?
Perfect
could I not have engaged? could you not have engaged? could he not have engaged? could we not have engaged? could you not have engaged? could they not have engaged?
Perfect en V-ing
could I not have been engaging? could you not have been engaging? could he not have been engaging? could we not have been engaging? could you not have been engaging? could they not have been engaging?