Conjugação do verbo inglês
COULD RETIGHTEN

Verbo regular: retighten - retightened - retightened

Afirmação

Forma simple	Forma com V-ing
I could retighten you could retighten she could retighten we could retighten you could retighten they could retighten	I could be retightening you could be retightening she could be retightening we could be retightening you could be retightening they could be retightening
Perfeito	Perfeito com V-ing
I could have retightened you could have retightened she could have retightened we could have retightened you could have retightened they could have retightened	I could have been retightening you could have been retightening she could have been retightening we could have been retightening you could have been retightening they could have been retightening

Negação

Forma simple	Forma com V-ing
I couldn't retighten you couldn't retighten she couldn't retighten we couldn't retighten you couldn't retighten they couldn't retighten	I couldn't be retightening you couldn't be retightening she couldn't be retightening we couldn't be retightening you couldn't be retightening they couldn't be retightening
Perfeito	Perfeito com V-ing
I couldn't have retightened you couldn't have retightened she couldn't have retightened we couldn't have retightened you couldn't have retightened they couldn't have retightened	I couldn't have been retightening you couldn't have been retightening she couldn't have been retightening we couldn't have been retightening you couldn't have been retightening they couldn't have been retightening

Forma interrogativa

Forma simple	Forma com V-ing
could I retighten? could you retighten? could she retighten? could we retighten? could you retighten? could they retighten?	could I be retightening? could you be retightening? could she be retightening? could we be retightening? could you be retightening? could they be retightening?
Perfeito	Perfeito com V-ing
could I have retightened? could you have retightened? could she have retightened? could we have retightened? could you have retightened? could they have retightened?	could I have been retightening? could you have been retightening? could she have been retightening? could we have been retightening? could you have been retightening? could they have been retightening?

Forma interro-Negação

Forma simple	Forma com V-ing
couldn't I retighten? couldn't you retighten? couldn't she retighten? couldn't we retighten? couldn't you retighten? couldn't they retighten?	couldn't I be retightening? couldn't you be retightening? couldn't she be retightening? couldn't we be retightening? couldn't you be retightening? couldn't they be retightening?
Perfeito	Perfeito com V-ing
couldn't I have retightened? couldn't you have retightened? couldn't she have retightened? couldn't we have retightened? couldn't you have retightened? couldn't they have retightened?	couldn't I have been retightening? couldn't you have been retightening? couldn't she have been retightening? couldn't we have been retightening? couldn't you have been retightening? couldn't they have been retightening?