I could undergird you could undergird he could undergird we could undergird you could undergird they could undergird
Forme en V-ing
I could be undergirding you could be undergirding he could be undergirding we could be undergirding you could be undergirding they could be undergirding
Perfect
I could have undergirt, undergirded you could have undergirt, undergirded he could have undergirt, undergirded we could have undergirt, undergirded you could have undergirt, undergirded they could have undergirt, undergirded
Perfect en V-ing
I could have been undergirding you could have been undergirding he could have been undergirding we could have been undergirding you could have been undergirding they could have been undergirding
Négation
Forme simple
I could not undergird you could not undergird he could not undergird we could not undergird you could not undergird they could not undergird
Forme en V-ing
I could not be undergirding you could not be undergirding he could not be undergirding we could not be undergirding you could not be undergirding they could not be undergirding
Perfect
I could not have undergirt, undergirded you could not have undergirt, undergirded he could not have undergirt, undergirded we could not have undergirt, undergirded you could not have undergirt, undergirded they could not have undergirt, undergirded
Perfect en V-ing
I could not have been undergirding you could not have been undergirding he could not have been undergirding we could not have been undergirding you could not have been undergirding they could not have been undergirding
Forme interrogative
Forme simple
could I undergird? could you undergird? could he undergird? could we undergird? could you undergird? could they undergird?
Forme en V-ing
could I be undergirding? could you be undergirding? could he be undergirding? could we be undergirding? could you be undergirding? could they be undergirding?
Perfect
could I have undergirt, undergirded? could you have undergirt, undergirded? could he have undergirt, undergirded? could we have undergirt, undergirded? could you have undergirt, undergirded? could they have undergirt, undergirded?
Perfect en V-ing
could I have been undergirding? could you have been undergirding? could he have been undergirding? could we have been undergirding? could you have been undergirding? could they have been undergirding?
Forme interro-négative
Forme simple
could I not undergird? could you not undergird? could he not undergird? could we not undergird? could you not undergird? could they not undergird?
Forme en V-ing
could I not be undergirding? could you not be undergirding? could he not be undergirding? could we not be undergirding? could you not be undergirding? could they not be undergirding?
Perfect
could I not have undergirt, undergirded? could you not have undergirt, undergirded? could he not have undergirt, undergirded? could we not have undergirt, undergirded? could you not have undergirt, undergirded? could they not have undergirt, undergirded?
Perfect en V-ing
could I not have been undergirding? could you not have been undergirding? could he not have been undergirding? could we not have been undergirding? could you not have been undergirding? could they not have been undergirding?