I could clench you could clench he could clench we could clench you could clench they could clench
Forme en V-ing
I could be clenching you could be clenching he could be clenching we could be clenching you could be clenching they could be clenching
Perfect
I could have clenched you could have clenched he could have clenched we could have clenched you could have clenched they could have clenched
Perfect en V-ing
I could have been clenching you could have been clenching he could have been clenching we could have been clenching you could have been clenching they could have been clenching
Négation
Forme simple
I could not clench you could not clench he could not clench we could not clench you could not clench they could not clench
Forme en V-ing
I could not be clenching you could not be clenching he could not be clenching we could not be clenching you could not be clenching they could not be clenching
Perfect
I could not have clenched you could not have clenched he could not have clenched we could not have clenched you could not have clenched they could not have clenched
Perfect en V-ing
I could not have been clenching you could not have been clenching he could not have been clenching we could not have been clenching you could not have been clenching they could not have been clenching
Forme interrogative
Forme simple
could I clench? could you clench? could he clench? could we clench? could you clench? could they clench?
Forme en V-ing
could I be clenching? could you be clenching? could he be clenching? could we be clenching? could you be clenching? could they be clenching?
Perfect
could I have clenched? could you have clenched? could he have clenched? could we have clenched? could you have clenched? could they have clenched?
Perfect en V-ing
could I have been clenching? could you have been clenching? could he have been clenching? could we have been clenching? could you have been clenching? could they have been clenching?
Forme interro-négative
Forme simple
could I not clench? could you not clench? could he not clench? could we not clench? could you not clench? could they not clench?
Forme en V-ing
could I not be clenching? could you not be clenching? could he not be clenching? could we not be clenching? could you not be clenching? could they not be clenching?
Perfect
could I not have clenched? could you not have clenched? could he not have clenched? could we not have clenched? could you not have clenched? could they not have clenched?
Perfect en V-ing
could I not have been clenching? could you not have been clenching? could he not have been clenching? could we not have been clenching? could you not have been clenching? could they not have been clenching?