Conjugación del verbo inglés
COULD UNDERUSE

Verbo regular: underuse - underused - underused

Afirmación

Forma simple	Forma con 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
Perfecto	Perfecto con V-ing
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

Negación

Forma simple	Forma con V-ing
I could not underuse you could not underuse he could not underuse we could not underuse you could not underuse they could not underuse	I could not be underusing you could not be underusing he could not be underusing we could not be underusing you could not be underusing they could not be underusing
Perfecto	Perfecto con V-ing
I could not have underused you could not have underused he could not have underused we could not have underused you could not have underused they could not have underused	I could not have been underusing you could not have been underusing he could not have been underusing we could not have been underusing you could not have been underusing they could not have been underusing

Forma interrogativa

Forma simple	Forma con 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?
Perfecto	Perfecto con V-ing
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?

Forma interro-negativa

Forma simple	Forma con V-ing
could I not underuse? could you not underuse? could he not underuse? could we not underuse? could you not underuse? could they not underuse?	could I not be underusing? could you not be underusing? could he not be underusing? could we not be underusing? could you not be underusing? could they not be underusing?
Perfecto	Perfecto con V-ing
could I not have underused? could you not have underused? could he not have underused? could we not have underused? could you not have underused? could they not have underused?	could I not have been underusing? could you not have been underusing? could he not have been underusing? could we not have been underusing? could you not have been underusing? could they not have been underusing?