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

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd undergird
you'd undergird
he'd undergird
we'd undergird
you'd undergird
they'd undergird 	I'd be undergirding
you'd be undergirding
he'd be undergirding
we'd be undergirding
you'd be undergirding
they'd be undergirding	I would've undergirt, undergirded
you would've undergirt, undergirded
he would've undergirt, undergirded
we would've undergirt, undergirded
you would've undergirt, undergirded
they would've undergirt, undergirded	I would've been undergirding
you would've been undergirding
he would've been undergirding
we would've been undergirding
you would've been undergirding
they would've been undergirding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I wouldn't undergird
you wouldn't undergird
he wouldn't undergird
we wouldn't undergird
you wouldn't undergird
they wouldn't undergird 	I wouldn't be undergirding
you wouldn't be undergirding
he wouldn't be undergirding
we wouldn't be undergirding
you wouldn't be undergirding
they wouldn't be undergirding	I wouldn't have undergirt, undergirded
you wouldn't have undergirt, undergirded
he wouldn't have undergirt, undergirded
we wouldn't have undergirt, undergirded
you wouldn't have undergirt, undergirded
they wouldn't have undergirt, undergirded	I wouldn't have been undergirding
you wouldn't have been undergirding
he wouldn't have been undergirding
we wouldn't have been undergirding
you wouldn't have been undergirding
they wouldn't have been undergirding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
would I undergird?
would you undergird?
would he undergird?
would we undergird?
would you undergird?
would they undergird? 	would I be undergirding?
would you be undergirding?
would he be undergirding?
would we be undergirding?
would you be undergirding?
would they be undergirding? 	would I have undergirt, undergirded?
would you have undergirt, undergirded?
would he have undergirt, undergirded?
would we have undergirt, undergirded?
would you have undergirt, undergirded?
would they have undergirt, undergirded? 	would I have been undergirding?
would you have been undergirding?
would he have been undergirding?
would we have been undergirding?
would you have been undergirding?
would they have been undergirding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
wouldn't I undergird?
wouldn't you undergird?
wouldn't he undergird?
wouldn't we undergird?
wouldn't you undergird?
wouldn't they undergird? 	wouldn't I be undergirding?
wouldn't you be undergirding?
wouldn't he be undergirding?
wouldn't we be undergirding?
wouldn't you be undergirding?
wouldn't they be undergirding? 	wouldn't I have undergirt, undergirded?
wouldn't you have undergirt, undergirded?
wouldn't he have undergirt, undergirded?
wouldn't we have undergirt, undergirded?
wouldn't you have undergirt, undergirded?
wouldn't they have undergirt, undergirded? 	wouldn't I have been undergirding?
wouldn't you have been undergirding?
wouldn't he have been undergirding?
wouldn't we have been undergirding?
wouldn't you have been undergirding?
wouldn't they have been undergirding?