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 couldn't underachieve you couldn't underachieve he couldn't underachieve we couldn't underachieve you couldn't underachieve they couldn't underachieve	I couldn't be underachieving you couldn't be underachieving he couldn't be underachieving we couldn't be underachieving you couldn't be underachieving they couldn't be underachieving
Perfeito	Perfeito com V-ing
I couldn't have underachieved you couldn't have underachieved he couldn't have underachieved we couldn't have underachieved you couldn't have underachieved they couldn't have underachieved	I couldn't have been underachieving you couldn't have been underachieving he couldn't have been underachieving we couldn't have been underachieving you couldn't have been underachieving they couldn't 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
couldn't I underachieve? couldn't you underachieve? couldn't he underachieve? couldn't we underachieve? couldn't you underachieve? couldn't they underachieve?	couldn't I be underachieving? couldn't you be underachieving? couldn't he be underachieving? couldn't we be underachieving? couldn't you be underachieving? couldn't they be underachieving?
Perfeito	Perfeito com V-ing
couldn't I have underachieved? couldn't you have underachieved? couldn't he have underachieved? couldn't we have underachieved? couldn't you have underachieved? couldn't they have underachieved?	couldn't I have been underachieving? couldn't you have been underachieving? couldn't he have been underachieving? couldn't we have been underachieving? couldn't you have been underachieving? couldn't they have been underachieving?