Conjugação do verbo inglês
COULD DARKEN

Verbo regular: darken - darkened - darkened

Afirmação

Forma simple	Forma com V-ing
I could darken you could darken he could darken we could darken you could darken they could darken	I could be darkening you could be darkening he could be darkening we could be darkening you could be darkening they could be darkening
Perfeito	Perfeito com V-ing
I could have darkened you could have darkened he could have darkened we could have darkened you could have darkened they could have darkened	I could have been darkening you could have been darkening he could have been darkening we could have been darkening you could have been darkening they could have been darkening

Negação

Forma simple	Forma com V-ing
I couldn't darken you couldn't darken he couldn't darken we couldn't darken you couldn't darken they couldn't darken	I couldn't be darkening you couldn't be darkening he couldn't be darkening we couldn't be darkening you couldn't be darkening they couldn't be darkening
Perfeito	Perfeito com V-ing
I couldn't have darkened you couldn't have darkened he couldn't have darkened we couldn't have darkened you couldn't have darkened they couldn't have darkened	I couldn't have been darkening you couldn't have been darkening he couldn't have been darkening we couldn't have been darkening you couldn't have been darkening they couldn't have been darkening

Forma interrogativa

Forma simple	Forma com V-ing
could I darken? could you darken? could he darken? could we darken? could you darken? could they darken?	could I be darkening? could you be darkening? could he be darkening? could we be darkening? could you be darkening? could they be darkening?
Perfeito	Perfeito com V-ing
could I have darkened? could you have darkened? could he have darkened? could we have darkened? could you have darkened? could they have darkened?	could I have been darkening? could you have been darkening? could he have been darkening? could we have been darkening? could you have been darkening? could they have been darkening?

Forma interro-Negação

Forma simple	Forma com V-ing
couldn't I darken? couldn't you darken? couldn't he darken? couldn't we darken? couldn't you darken? couldn't they darken?	couldn't I be darkening? couldn't you be darkening? couldn't he be darkening? couldn't we be darkening? couldn't you be darkening? couldn't they be darkening?
Perfeito	Perfeito com V-ing
couldn't I have darkened? couldn't you have darkened? couldn't he have darkened? couldn't we have darkened? couldn't you have darkened? couldn't they have darkened?	couldn't I have been darkening? couldn't you have been darkening? couldn't he have been darkening? couldn't we have been darkening? couldn't you have been darkening? couldn't they have been darkening?