Conjugación del verbo inglés
CAN UNDERUSE

Verbo regular: underuse - underused - underused

Afirmación

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

Negación

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

Forma interrogativa

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

Forma interro-negativa

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