Conjugación del verbo inglés
COULD RETIGHTEN

Verbo regular: retighten - retightened - retightened

Afirmación

Forma simple	Forma con V-ing
I could retighten you could retighten he could retighten we could retighten you could retighten they could retighten	I could be retightening you could be retightening he could be retightening we could be retightening you could be retightening they could be retightening
Perfecto	Perfecto con V-ing
I could have retightened you could have retightened he 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 he could have been retightening we could have been retightening you could have been retightening they could have been retightening

Negación

Forma simple	Forma con V-ing
I could not retighten you could not retighten he could not retighten we could not retighten you could not retighten they could not retighten	I could not be retightening you could not be retightening he could not be retightening we could not be retightening you could not be retightening they could not be retightening
Perfecto	Perfecto con V-ing
I could not have retightened you could not have retightened he could not have retightened we could not have retightened you could not have retightened they could not have retightened	I could not have been retightening you could not have been retightening he could not have been retightening we could not have been retightening you could not have been retightening they could not have been retightening

Forma interrogativa

Forma simple	Forma con V-ing
could I retighten? could you retighten? could he retighten? could we retighten? could you retighten? could they retighten?	could I be retightening? could you be retightening? could he be retightening? could we be retightening? could you be retightening? could they be retightening?
Perfecto	Perfecto con V-ing
could I have retightened? could you have retightened? could he 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 he have been retightening? could we have been retightening? could you have been retightening? could they have been retightening?

Forma interro-negativa

Forma simple	Forma con V-ing
could I not retighten? could you not retighten? could he not retighten? could we not retighten? could you not retighten? could they not retighten?	could I not be retightening? could you not be retightening? could he not be retightening? could we not be retightening? could you not be retightening? could they not be retightening?
Perfecto	Perfecto con V-ing
could I not have retightened? could you not have retightened? could he not have retightened? could we not have retightened? could you not have retightened? could they not have retightened?	could I not have been retightening? could you not have been retightening? could he not have been retightening? could we not have been retightening? could you not have been retightening? could they not have been retightening?