could underuse
Verbe régulier : underuse - underused- underused
Traduction française : sous-utiliser 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could underuse
you could underuse
he could underuse
we could underuse
you could underuse
they could underuse 	I could be underusing
you could be underusing
he could be underusing
we could be underusing
you could be underusing
they could be underusing	I could have underused
you could have underused
he could have underused
we could have underused
you could have underused
they could have underused	I could have been underusing
you could have been underusing
he could have been underusing
we could have been underusing
you could have been underusing
they could have been underusing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't underuse
you couldn't underuse
he couldn't underuse
we couldn't underuse
you couldn't underuse
they couldn't underuse 	I couldn't be underusing
you couldn't be underusing
he couldn't be underusing
we couldn't be underusing
you couldn't be underusing
they couldn't be underusing	I couldn't have underused
you couldn't have underused
he couldn't have underused
we couldn't have underused
you couldn't have underused
they couldn't have underused	I couldn't have been underusing
you couldn't have been underusing
he couldn't have been underusing
we couldn't have been underusing
you couldn't have been underusing
they couldn't have been underusing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I underuse?
could you underuse?
could he underuse?
could we underuse?
could you underuse?
could they underuse? 	could I be underusing?
could you be underusing?
could he be underusing?
could we be underusing?
could you be underusing?
could they be underusing? 	could I have underused?
could you have underused?
could he have underused?
could we have underused?
could you have underused?
could they have underused? 	could I have been underusing?
could you have been underusing?
could he have been underusing?
could we have been underusing?
could you have been underusing?
could they have been underusing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I underuse?
couldn't you underuse?
couldn't he underuse?
couldn't we underuse?
couldn't you underuse?
couldn't they underuse? 	couldn't I be underusing?
couldn't you be underusing?
couldn't he be underusing?
couldn't we be underusing?
couldn't you be underusing?
couldn't they be underusing? 	couldn't I have underused?
couldn't you have underused?
couldn't he have underused?
couldn't we have underused?
couldn't you have underused?
couldn't they have underused? 	couldn't I have been underusing?
couldn't you have been underusing?
couldn't he have been underusing?
couldn't we have been underusing?
couldn't you have been underusing?
couldn't they have been underusing?