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 couldn't undergird you couldn't undergird he couldn't undergird we couldn't undergird you couldn't undergird they couldn't undergird	I couldn't be undergirding you couldn't be undergirding he couldn't be undergirding we couldn't be undergirding you couldn't be undergirding they couldn't be undergirding
Perfect	V-ing perfect
I couldn't have undergirt, undergirded you couldn't have undergirt, undergirded he couldn't have undergirt, undergirded we couldn't have undergirt, undergirded you couldn't have undergirt, undergirded they couldn't have undergirt, undergirded	I couldn't have been undergirding you couldn't have been undergirding he couldn't have been undergirding we couldn't have been undergirding you couldn't have been undergirding they couldn't 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
couldn't I undergird? couldn't you undergird? couldn't he undergird? couldn't we undergird? couldn't you undergird? couldn't they undergird?	couldn't I be undergirding? couldn't you be undergirding? couldn't he be undergirding? couldn't we be undergirding? couldn't you be undergirding? couldn't they be undergirding?
Perfect	V-ing perfect
couldn't I have undergirt, undergirded? couldn't you have undergirt, undergirded? couldn't he have undergirt, undergirded? couldn't we have undergirt, undergirded? couldn't you have undergirt, undergirded? couldn't they have undergirt, undergirded?	couldn't I have been undergirding? couldn't you have been undergirding? couldn't he have been undergirding? couldn't we have been undergirding? couldn't you have been undergirding? couldn't they have been undergirding?