Conjugação do verbo inglês
COULD UNDERACHIEVE

Verbo regular: underachieve - underachieved - underachieved

Afirmação

Forma simple	Forma com V-ing
I could underachieve you could underachieve he could underachieve we could underachieve you could underachieve they could underachieve	I could be underachieving you could be underachieving he could be underachieving we could be underachieving you could be underachieving they could be underachieving
Perfeito	Perfeito com V-ing
I could have underachieved you could have underachieved he 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 he could have been underachieving we could have been underachieving you could have been underachieving they could have been underachieving

Negação

Forma simple	Forma com V-ing
I could not underachieve you could not underachieve he 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 he could not be underachieving we could not be underachieving you could not be underachieving they could not be underachieving
Perfeito	Perfeito com V-ing
I could not have underachieved you could not have underachieved he 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 he 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 com V-ing
could I underachieve? could you underachieve? could he underachieve? could we underachieve? could you underachieve? could they underachieve?	could I be underachieving? could you be underachieving? could he be underachieving? could we be underachieving? could you be underachieving? could they be underachieving?
Perfeito	Perfeito com V-ing
could I have underachieved? could you have underachieved? could he 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 he have been underachieving? could we have been underachieving? could you have been underachieving? could they have been underachieving?

Forma interro-Negação

Forma simple	Forma com V-ing
could I not underachieve? could you not underachieve? could he 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 he not be underachieving? could we not be underachieving? could you not be underachieving? could they not be underachieving?
Perfeito	Perfeito com V-ing
could I not have underachieved? could you not have underachieved? could he 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 he not have been underachieving? could we not have been underachieving? could you not have been underachieving? could they not have been underachieving?