English verb conjugation
COULD UNDERGIRD

Irregular verb: undergird - undergirt, undergirded - undergirt, undergirded

Affirmation

Simple form	V-ing form
I could undergird you could undergird he could undergird we could undergird you could undergird they could undergird	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	V-ing 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	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

Negation

Simple form	V-ing form
I could not undergird you could not undergird he could not undergird we could not undergird you could not undergird they could not undergird	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	V-ing 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	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

Interrogative form

Simple form	V-ing form
could I undergird? could you undergird? could he undergird? could we undergird? could you undergird? could they undergird?	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	V-ing 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?	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?

Interro-negative form

Simple form	V-ing form
could I not undergird? could you not undergird? could he not undergird? could we not undergird? could you not undergird? could they not undergird?	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	V-ing 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?	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?