Conjugação do verbo inglês
COULD STRENGTHEN

Verbo regular: strengthen - strengthened - strengthened

Afirmação

Forma simple	Forma com V-ing
I could strengthen you could strengthen he could strengthen we could strengthen you could strengthen they could strengthen	I could be strengthening you could be strengthening he could be strengthening we could be strengthening you could be strengthening they could be strengthening
Perfeito	Perfeito com V-ing
I could have strengthened you could have strengthened he could have strengthened we could have strengthened you could have strengthened they could have strengthened	I could have been strengthening you could have been strengthening he could have been strengthening we could have been strengthening you could have been strengthening they could have been strengthening

Negação

Forma simple	Forma com V-ing
I could not strengthen you could not strengthen he could not strengthen we could not strengthen you could not strengthen they could not strengthen	I could not be strengthening you could not be strengthening he could not be strengthening we could not be strengthening you could not be strengthening they could not be strengthening
Perfeito	Perfeito com V-ing
I could not have strengthened you could not have strengthened he could not have strengthened we could not have strengthened you could not have strengthened they could not have strengthened	I could not have been strengthening you could not have been strengthening he could not have been strengthening we could not have been strengthening you could not have been strengthening they could not have been strengthening

Forma interrogativa

Forma simple	Forma com V-ing
could I strengthen? could you strengthen? could he strengthen? could we strengthen? could you strengthen? could they strengthen?	could I be strengthening? could you be strengthening? could he be strengthening? could we be strengthening? could you be strengthening? could they be strengthening?
Perfeito	Perfeito com V-ing
could I have strengthened? could you have strengthened? could he have strengthened? could we have strengthened? could you have strengthened? could they have strengthened?	could I have been strengthening? could you have been strengthening? could he have been strengthening? could we have been strengthening? could you have been strengthening? could they have been strengthening?

Forma interro-Negação

Forma simple	Forma com V-ing
could I not strengthen? could you not strengthen? could he not strengthen? could we not strengthen? could you not strengthen? could they not strengthen?	could I not be strengthening? could you not be strengthening? could he not be strengthening? could we not be strengthening? could you not be strengthening? could they not be strengthening?
Perfeito	Perfeito com V-ing
could I not have strengthened? could you not have strengthened? could he not have strengthened? could we not have strengthened? could you not have strengthened? could they not have strengthened?	could I not have been strengthening? could you not have been strengthening? could he not have been strengthening? could we not have been strengthening? could you not have been strengthening? could they not have been strengthening?