I could retread you could retread she could retread we could retread you could retread they could retread
Forme en V-ing
I could be retreading you could be retreading she could be retreading we could be retreading you could be retreading they could be retreading
Perfect
I could have retreaded you could have retreaded she could have retreaded we could have retreaded you could have retreaded they could have retreaded
Perfect en V-ing
I could have been retreading you could have been retreading she could have been retreading we could have been retreading you could have been retreading they could have been retreading
Négation
Forme simple
I could not retread you could not retread she could not retread we could not retread you could not retread they could not retread
Forme en V-ing
I could not be retreading you could not be retreading she could not be retreading we could not be retreading you could not be retreading they could not be retreading
Perfect
I could not have retreaded you could not have retreaded she could not have retreaded we could not have retreaded you could not have retreaded they could not have retreaded
Perfect en V-ing
I could not have been retreading you could not have been retreading she could not have been retreading we could not have been retreading you could not have been retreading they could not have been retreading
Forme interrogative
Forme simple
could I retread? could you retread? could she retread? could we retread? could you retread? could they retread?
Forme en V-ing
could I be retreading? could you be retreading? could she be retreading? could we be retreading? could you be retreading? could they be retreading?
Perfect
could I have retreaded? could you have retreaded? could she have retreaded? could we have retreaded? could you have retreaded? could they have retreaded?
Perfect en V-ing
could I have been retreading? could you have been retreading? could she have been retreading? could we have been retreading? could you have been retreading? could they have been retreading?
Forme interro-négative
Forme simple
could I not retread? could you not retread? could she not retread? could we not retread? could you not retread? could they not retread?
Forme en V-ing
could I not be retreading? could you not be retreading? could she not be retreading? could we not be retreading? could you not be retreading? could they not be retreading?
Perfect
could I not have retreaded? could you not have retreaded? could she not have retreaded? could we not have retreaded? could you not have retreaded? could they not have retreaded?
Perfect en V-ing
could I not have been retreading? could you not have been retreading? could she not have been retreading? could we not have been retreading? could you not have been retreading? could they not have been retreading?