should undergird
Verbe irrégulier : undergird - undergirt, undergirded- undergirt, undergirded

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I'd undergird
you'd undergird
she'd undergird
we'd undergird
you'd undergird
they'd undergird 	I'd be undergirding
you'd be undergirding
she'd be undergirding
we'd be undergirding
you'd be undergirding
they'd be undergirding	I should've undergirt, undergirded
you should've undergirt, undergirded
she should've undergirt, undergirded
we should've undergirt, undergirded
you should've undergirt, undergirded
they should've undergirt, undergirded	I should've been undergirding
you should've been undergirding
she should've been undergirding
we should've been undergirding
you should've been undergirding
they should've been undergirding	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I shouldn't undergird
you shouldn't undergird
she shouldn't undergird
we shouldn't undergird
you shouldn't undergird
they shouldn't undergird 	I shouldn't be undergirding
you shouldn't be undergirding
she shouldn't be undergirding
we shouldn't be undergirding
you shouldn't be undergirding
they shouldn't be undergirding	I shouldn't have undergirt, undergirded
you shouldn't have undergirt, undergirded
she shouldn't have undergirt, undergirded
we shouldn't have undergirt, undergirded
you shouldn't have undergirt, undergirded
they shouldn't have undergirt, undergirded	I shouldn't have been undergirding
you shouldn't have been undergirding
she shouldn't have been undergirding
we shouldn't have been undergirding
you shouldn't have been undergirding
they shouldn't have been undergirding	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
should I undergird?
should you undergird?
should she undergird?
should we undergird?
should you undergird?
should they undergird? 	should I be undergirding?
should you be undergirding?
should she be undergirding?
should we be undergirding?
should you be undergirding?
should they be undergirding? 	should I have undergirt, undergirded?
should you have undergirt, undergirded?
should she have undergirt, undergirded?
should we have undergirt, undergirded?
should you have undergirt, undergirded?
should they have undergirt, undergirded? 	should I have been undergirding?
should you have been undergirding?
should she have been undergirding?
should we have been undergirding?
should you have been undergirding?
should they have been undergirding? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
shouldn't I undergird?
shouldn't you undergird?
shouldn't she undergird?
shouldn't we undergird?
shouldn't you undergird?
shouldn't they undergird? 	shouldn't I be undergirding?
shouldn't you be undergirding?
shouldn't she be undergirding?
shouldn't we be undergirding?
shouldn't you be undergirding?
shouldn't they be undergirding? 	shouldn't I have undergirt, undergirded?
shouldn't you have undergirt, undergirded?
shouldn't she have undergirt, undergirded?
shouldn't we have undergirt, undergirded?
shouldn't you have undergirt, undergirded?
shouldn't they have undergirt, undergirded? 	shouldn't I have been undergirding?
shouldn't you have been undergirding?
shouldn't she have been undergirding?
shouldn't we have been undergirding?
shouldn't you have been undergirding?
shouldn't they have been undergirding?