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

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

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I should not undergird
you should not undergird
she should not undergird
we should not undergird
you should not undergird
they should not undergird 	I should not be undergirding
you should not be undergirding
she should not be undergirding
we should not be undergirding
you should not be undergirding
they should not be undergirding	I should not have undergirt, undergirded
you should not have undergirt, undergirded
she should not have undergirt, undergirded
we should not have undergirt, undergirded
you should not have undergirt, undergirded
they should not have undergirt, undergirded	I should not have been undergirding
you should not have been undergirding
she should not have been undergirding
we should not have been undergirding
you should not have been undergirding
they should not 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 	
should I not undergird?
should you not undergird?
should she not undergird?
should we not undergird?
should you not undergird?
should they not undergird? 	should I not be undergirding?
should you not be undergirding?
should she not be undergirding?
should we not be undergirding?
should you not be undergirding?
should they not be undergirding? 	should I not have undergirt, undergirded?
should you not have undergirt, undergirded?
should she not have undergirt, undergirded?
should we not have undergirt, undergirded?
should you not have undergirt, undergirded?
should they not have undergirt, undergirded? 	should I not have been undergirding?
should you not have been undergirding?
should she not have been undergirding?
should we not have been undergirding?
should you not have been undergirding?
should they not have been undergirding?