I could exercise you could exercise he could exercise we could exercise you could exercise they could exercise
Forma com V-ing
I could be exercising you could be exercising he could be exercising we could be exercising you could be exercising they could be exercising
Perfeito
I could have exercised you could have exercised he could have exercised we could have exercised you could have exercised they could have exercised
Perfeito com V-ing
I could have been exercising you could have been exercising he could have been exercising we could have been exercising you could have been exercising they could have been exercising
Negação
Forma simple
I could not exercise you could not exercise he could not exercise we could not exercise you could not exercise they could not exercise
Forma com V-ing
I could not be exercising you could not be exercising he could not be exercising we could not be exercising you could not be exercising they could not be exercising
Perfeito
I could not have exercised you could not have exercised he could not have exercised we could not have exercised you could not have exercised they could not have exercised
Perfeito com V-ing
I could not have been exercising you could not have been exercising he could not have been exercising we could not have been exercising you could not have been exercising they could not have been exercising
Forma interrogativa
Forma simple
could I exercise? could you exercise? could he exercise? could we exercise? could you exercise? could they exercise?
Forma com V-ing
could I be exercising? could you be exercising? could he be exercising? could we be exercising? could you be exercising? could they be exercising?
Perfeito
could I have exercised? could you have exercised? could he have exercised? could we have exercised? could you have exercised? could they have exercised?
Perfeito com V-ing
could I have been exercising? could you have been exercising? could he have been exercising? could we have been exercising? could you have been exercising? could they have been exercising?
Forma interro-Negação
Forma simple
could I not exercise? could you not exercise? could he not exercise? could we not exercise? could you not exercise? could they not exercise?
Forma com V-ing
could I not be exercising? could you not be exercising? could he not be exercising? could we not be exercising? could you not be exercising? could they not be exercising?
Perfeito
could I not have exercised? could you not have exercised? could he not have exercised? could we not have exercised? could you not have exercised? could they not have exercised?
Perfeito com V-ing
could I not have been exercising? could you not have been exercising? could he not have been exercising? could we not have been exercising? could you not have been exercising? could they not have been exercising?