I could stifle you could stifle he could stifle we could stifle you could stifle they could stifle
Forme en V-ing
I could be stifling you could be stifling he could be stifling we could be stifling you could be stifling they could be stifling
Perfect
I could have stifled you could have stifled he could have stifled we could have stifled you could have stifled they could have stifled
Perfect en V-ing
I could have been stifling you could have been stifling he could have been stifling we could have been stifling you could have been stifling they could have been stifling
Négation
Forme simple
I could not stifle you could not stifle he could not stifle we could not stifle you could not stifle they could not stifle
Forme en V-ing
I could not be stifling you could not be stifling he could not be stifling we could not be stifling you could not be stifling they could not be stifling
Perfect
I could not have stifled you could not have stifled he could not have stifled we could not have stifled you could not have stifled they could not have stifled
Perfect en V-ing
I could not have been stifling you could not have been stifling he could not have been stifling we could not have been stifling you could not have been stifling they could not have been stifling
Forme interrogative
Forme simple
could I stifle? could you stifle? could he stifle? could we stifle? could you stifle? could they stifle?
Forme en V-ing
could I be stifling? could you be stifling? could he be stifling? could we be stifling? could you be stifling? could they be stifling?
Perfect
could I have stifled? could you have stifled? could he have stifled? could we have stifled? could you have stifled? could they have stifled?
Perfect en V-ing
could I have been stifling? could you have been stifling? could he have been stifling? could we have been stifling? could you have been stifling? could they have been stifling?
Forme interro-négative
Forme simple
could I not stifle? could you not stifle? could he not stifle? could we not stifle? could you not stifle? could they not stifle?
Forme en V-ing
could I not be stifling? could you not be stifling? could he not be stifling? could we not be stifling? could you not be stifling? could they not be stifling?
Perfect
could I not have stifled? could you not have stifled? could he not have stifled? could we not have stifled? could you not have stifled? could they not have stifled?
Perfect en V-ing
could I not have been stifling? could you not have been stifling? could he not have been stifling? could we not have been stifling? could you not have been stifling? could they not have been stifling?