I could square you could square he could square we could square you could square they could square
Forma com V-ing
I could be squaring you could be squaring he could be squaring we could be squaring you could be squaring they could be squaring
Perfeito
I could have squared you could have squared he could have squared we could have squared you could have squared they could have squared
Perfeito com V-ing
I could have been squaring you could have been squaring he could have been squaring we could have been squaring you could have been squaring they could have been squaring
Negação
Forma simple
I could not square you could not square he could not square we could not square you could not square they could not square
Forma com V-ing
I could not be squaring you could not be squaring he could not be squaring we could not be squaring you could not be squaring they could not be squaring
Perfeito
I could not have squared you could not have squared he could not have squared we could not have squared you could not have squared they could not have squared
Perfeito com V-ing
I could not have been squaring you could not have been squaring he could not have been squaring we could not have been squaring you could not have been squaring they could not have been squaring
Forma interrogativa
Forma simple
could I square? could you square? could he square? could we square? could you square? could they square?
Forma com V-ing
could I be squaring? could you be squaring? could he be squaring? could we be squaring? could you be squaring? could they be squaring?
Perfeito
could I have squared? could you have squared? could he have squared? could we have squared? could you have squared? could they have squared?
Perfeito com V-ing
could I have been squaring? could you have been squaring? could he have been squaring? could we have been squaring? could you have been squaring? could they have been squaring?
Forma interro-Negação
Forma simple
could I not square? could you not square? could he not square? could we not square? could you not square? could they not square?
Forma com V-ing
could I not be squaring? could you not be squaring? could he not be squaring? could we not be squaring? could you not be squaring? could they not be squaring?
Perfeito
could I not have squared? could you not have squared? could he not have squared? could we not have squared? could you not have squared? could they not have squared?
Perfeito com V-ing
could I not have been squaring? could you not have been squaring? could he not have been squaring? could we not have been squaring? could you not have been squaring? could they not have been squaring?