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

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

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

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

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