Conjugação do verbo inglês
COULD WEAKEN

Verbo regular: weaken - weakened - weakened

Afirmação

Forma simple	Forma com V-ing
I could weaken you could weaken he could weaken we could weaken you could weaken they could weaken	I could be weakening you could be weakening he could be weakening we could be weakening you could be weakening they could be weakening
Perfeito	Perfeito com V-ing
I could have weakened you could have weakened he could have weakened we could have weakened you could have weakened they could have weakened	I could have been weakening you could have been weakening he could have been weakening we could have been weakening you could have been weakening they could have been weakening

Negação

Forma simple	Forma com V-ing
I couldn't weaken you couldn't weaken he couldn't weaken we couldn't weaken you couldn't weaken they couldn't weaken	I couldn't be weakening you couldn't be weakening he couldn't be weakening we couldn't be weakening you couldn't be weakening they couldn't be weakening
Perfeito	Perfeito com V-ing
I couldn't have weakened you couldn't have weakened he couldn't have weakened we couldn't have weakened you couldn't have weakened they couldn't have weakened	I couldn't have been weakening you couldn't have been weakening he couldn't have been weakening we couldn't have been weakening you couldn't have been weakening they couldn't have been weakening

Forma interrogativa

Forma simple	Forma com V-ing
could I weaken? could you weaken? could he weaken? could we weaken? could you weaken? could they weaken?	could I be weakening? could you be weakening? could he be weakening? could we be weakening? could you be weakening? could they be weakening?
Perfeito	Perfeito com V-ing
could I have weakened? could you have weakened? could he have weakened? could we have weakened? could you have weakened? could they have weakened?	could I have been weakening? could you have been weakening? could he have been weakening? could we have been weakening? could you have been weakening? could they have been weakening?

Forma interro-Negação

Forma simple	Forma com V-ing
couldn't I weaken? couldn't you weaken? couldn't he weaken? couldn't we weaken? couldn't you weaken? couldn't they weaken?	couldn't I be weakening? couldn't you be weakening? couldn't he be weakening? couldn't we be weakening? couldn't you be weakening? couldn't they be weakening?
Perfeito	Perfeito com V-ing
couldn't I have weakened? couldn't you have weakened? couldn't he have weakened? couldn't we have weakened? couldn't you have weakened? couldn't they have weakened?	couldn't I have been weakening? couldn't you have been weakening? couldn't he have been weakening? couldn't we have been weakening? couldn't you have been weakening? couldn't they have been weakening?