Conjugação do verbo inglês
COULD SIGH

Verbo regular: sigh - sighed - sighed

Afirmação

Forma simple	Forma com V-ing
I could sigh you could sigh she could sigh we could sigh you could sigh they could sigh	I could be sighing you could be sighing she could be sighing we could be sighing you could be sighing they could be sighing
Perfeito	Perfeito com V-ing
I could have sighed you could have sighed she could have sighed we could have sighed you could have sighed they could have sighed	I could have been sighing you could have been sighing she could have been sighing we could have been sighing you could have been sighing they could have been sighing

Negação

Forma simple	Forma com V-ing
I could not sigh you could not sigh she could not sigh we could not sigh you could not sigh they could not sigh	I could not be sighing you could not be sighing she could not be sighing we could not be sighing you could not be sighing they could not be sighing
Perfeito	Perfeito com V-ing
I could not have sighed you could not have sighed she could not have sighed we could not have sighed you could not have sighed they could not have sighed	I could not have been sighing you could not have been sighing she could not have been sighing we could not have been sighing you could not have been sighing they could not have been sighing

Forma interrogativa

Forma simple	Forma com V-ing
could I sigh? could you sigh? could she sigh? could we sigh? could you sigh? could they sigh?	could I be sighing? could you be sighing? could she be sighing? could we be sighing? could you be sighing? could they be sighing?
Perfeito	Perfeito com V-ing
could I have sighed? could you have sighed? could she have sighed? could we have sighed? could you have sighed? could they have sighed?	could I have been sighing? could you have been sighing? could she have been sighing? could we have been sighing? could you have been sighing? could they have been sighing?

Forma interro-Negação

Forma simple	Forma com V-ing
could I not sigh? could you not sigh? could she not sigh? could we not sigh? could you not sigh? could they not sigh?	could I not be sighing? could you not be sighing? could she not be sighing? could we not be sighing? could you not be sighing? could they not be sighing?
Perfeito	Perfeito com V-ing
could I not have sighed? could you not have sighed? could she not have sighed? could we not have sighed? could you not have sighed? could they not have sighed?	could I not have been sighing? could you not have been sighing? could she not have been sighing? could we not have been sighing? could you not have been sighing? could they not have been sighing?