shall underuse
Verbo regular: underuse - underused- underused

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I'll underuse
you'll underuse
he'll underuse
we'll underuse
you'll underuse
they'll underuse 	I'll be underusing
you'll be underusing
he'll be underusing
we'll be underusing
you'll be underusing
they'll be underusing	I'll have underused
you'll have underused
he'll have underused
we'll have underused
you'll have underused
they'll have underused	I'll have been underusing
you'll have been underusing
he'll have been underusing
we'll have been underusing
you'll have been underusing
they'll have been underusing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I shan't underuse
you shan't underuse
he shan't underuse
we shan't underuse
you shan't underuse
they shan't underuse 	I shan't be underusing
you shan't be underusing
he shan't be underusing
we shan't be underusing
you shan't be underusing
they shan't be underusing	I shan't have underused
you shan't have underused
he shan't have underused
we shan't have underused
you shan't have underused
they shan't have underused	I shan't have been underusing
you shan't have been underusing
he shan't have been underusing
we shan't have been underusing
you shan't have been underusing
they shan't have been underusing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
shall I underuse?
shall you underuse?
shall he underuse?
shall we underuse?
shall you underuse?
shall they underuse? 	shall I be underusing?
shall you be underusing?
shall he be underusing?
shall we be underusing?
shall you be underusing?
shall they be underusing? 	shall I have underused?
shall you have underused?
shall he have underused?
shall we have underused?
shall you have underused?
shall they have underused? 	shall I have been underusing?
shall you have been underusing?
shall he have been underusing?
shall we have been underusing?
shall you have been underusing?
shall they have been underusing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
shan't I underuse?
shan't you underuse?
shan't he underuse?
shan't we underuse?
shan't you underuse?
shan't they underuse? 	shan't I be underusing?
shan't you be underusing?
shan't he be underusing?
shan't we be underusing?
shan't you be underusing?
shan't they be underusing? 	shan't I have underused?
shan't you have underused?
shan't he have underused?
shan't we have underused?
shan't you have underused?
shan't they have underused? 	shan't I have been underusing?
shan't you have been underusing?
shan't he have been underusing?
shan't we have been underusing?
shan't you have been underusing?
shan't they have been underusing?