Conjugação do verbo inglês
COULD BRIGHTEN

Verbo regular: brighten - brightened - brightened

Afirmação

Forma simple	Forma com V-ing
I could brighten you could brighten he could brighten we could brighten you could brighten they could brighten	I could be brightening you could be brightening he could be brightening we could be brightening you could be brightening they could be brightening
Perfeito	Perfeito com V-ing
I could have brightened you could have brightened he could have brightened we could have brightened you could have brightened they could have brightened	I could have been brightening you could have been brightening he could have been brightening we could have been brightening you could have been brightening they could have been brightening

Negação

Forma simple	Forma com V-ing
I couldn't brighten you couldn't brighten he couldn't brighten we couldn't brighten you couldn't brighten they couldn't brighten	I couldn't be brightening you couldn't be brightening he couldn't be brightening we couldn't be brightening you couldn't be brightening they couldn't be brightening
Perfeito	Perfeito com V-ing
I couldn't have brightened you couldn't have brightened he couldn't have brightened we couldn't have brightened you couldn't have brightened they couldn't have brightened	I couldn't have been brightening you couldn't have been brightening he couldn't have been brightening we couldn't have been brightening you couldn't have been brightening they couldn't have been brightening

Forma interrogativa

Forma simple	Forma com V-ing
could I brighten? could you brighten? could he brighten? could we brighten? could you brighten? could they brighten?	could I be brightening? could you be brightening? could he be brightening? could we be brightening? could you be brightening? could they be brightening?
Perfeito	Perfeito com V-ing
could I have brightened? could you have brightened? could he have brightened? could we have brightened? could you have brightened? could they have brightened?	could I have been brightening? could you have been brightening? could he have been brightening? could we have been brightening? could you have been brightening? could they have been brightening?

Forma interro-Negação

Forma simple	Forma com V-ing
couldn't I brighten? couldn't you brighten? couldn't he brighten? couldn't we brighten? couldn't you brighten? couldn't they brighten?	couldn't I be brightening? couldn't you be brightening? couldn't he be brightening? couldn't we be brightening? couldn't you be brightening? couldn't they be brightening?
Perfeito	Perfeito com V-ing
couldn't I have brightened? couldn't you have brightened? couldn't he have brightened? couldn't we have brightened? couldn't you have brightened? couldn't they have brightened?	couldn't I have been brightening? couldn't you have been brightening? couldn't he have been brightening? couldn't we have been brightening? couldn't you have been brightening? couldn't they have been brightening?