Conjugación del verbo inglés
COULD UNDERACHIEVE

Verbo regular: underachieve - underachieved - underachieved

Afirmación

Forma simple	Forma con V-ing
I could underachieve you could underachieve she could underachieve we could underachieve you could underachieve they could underachieve	I could be underachieving you could be underachieving she could be underachieving we could be underachieving you could be underachieving they could be underachieving
Perfecto	Perfecto con V-ing
I could have underachieved you could have underachieved she could have underachieved we could have underachieved you could have underachieved they could have underachieved	I could have been underachieving you could have been underachieving she could have been underachieving we could have been underachieving you could have been underachieving they could have been underachieving

Negación

Forma simple	Forma con V-ing
I could not underachieve you could not underachieve she could not underachieve we could not underachieve you could not underachieve they could not underachieve	I could not be underachieving you could not be underachieving she could not be underachieving we could not be underachieving you could not be underachieving they could not be underachieving
Perfecto	Perfecto con V-ing
I could not have underachieved you could not have underachieved she could not have underachieved we could not have underachieved you could not have underachieved they could not have underachieved	I could not have been underachieving you could not have been underachieving she could not have been underachieving we could not have been underachieving you could not have been underachieving they could not have been underachieving

Forma interrogativa

Forma simple	Forma con V-ing
could I underachieve? could you underachieve? could she underachieve? could we underachieve? could you underachieve? could they underachieve?	could I be underachieving? could you be underachieving? could she be underachieving? could we be underachieving? could you be underachieving? could they be underachieving?
Perfecto	Perfecto con V-ing
could I have underachieved? could you have underachieved? could she have underachieved? could we have underachieved? could you have underachieved? could they have underachieved?	could I have been underachieving? could you have been underachieving? could she have been underachieving? could we have been underachieving? could you have been underachieving? could they have been underachieving?

Forma interro-negativa

Forma simple	Forma con V-ing
could I not underachieve? could you not underachieve? could she not underachieve? could we not underachieve? could you not underachieve? could they not underachieve?	could I not be underachieving? could you not be underachieving? could she not be underachieving? could we not be underachieving? could you not be underachieving? could they not be underachieving?
Perfecto	Perfecto con V-ing
could I not have underachieved? could you not have underachieved? could she not have underachieved? could we not have underachieved? could you not have underachieved? could they not have underachieved?	could I not have been underachieving? could you not have been underachieving? could she not have been underachieving? could we not have been underachieving? could you not have been underachieving? could they not have been underachieving?