I could babysit you could babysit he could babysit we could babysit you could babysit they could babysit
Forma con V-ing
I could be babysiting you could be babysiting he could be babysiting we could be babysiting you could be babysiting they could be babysiting
Perfecto
I could have babysat you could have babysat he could have babysat we could have babysat you could have babysat they could have babysat
Perfecto con V-ing
I could have been babysiting you could have been babysiting he could have been babysiting we could have been babysiting you could have been babysiting they could have been babysiting
Negación
Forma simple
I could not babysit you could not babysit he could not babysit we could not babysit you could not babysit they could not babysit
Forma con V-ing
I could not be babysiting you could not be babysiting he could not be babysiting we could not be babysiting you could not be babysiting they could not be babysiting
Perfecto
I could not have babysat you could not have babysat he could not have babysat we could not have babysat you could not have babysat they could not have babysat
Perfecto con V-ing
I could not have been babysiting you could not have been babysiting he could not have been babysiting we could not have been babysiting you could not have been babysiting they could not have been babysiting
Forma interrogativa
Forma simple
could I babysit? could you babysit? could he babysit? could we babysit? could you babysit? could they babysit?
Forma con V-ing
could I be babysiting? could you be babysiting? could he be babysiting? could we be babysiting? could you be babysiting? could they be babysiting?
Perfecto
could I have babysat? could you have babysat? could he have babysat? could we have babysat? could you have babysat? could they have babysat?
Perfecto con V-ing
could I have been babysiting? could you have been babysiting? could he have been babysiting? could we have been babysiting? could you have been babysiting? could they have been babysiting?
Forma interro-negativa
Forma simple
could I not babysit? could you not babysit? could he not babysit? could we not babysit? could you not babysit? could they not babysit?
Forma con V-ing
could I not be babysiting? could you not be babysiting? could he not be babysiting? could we not be babysiting? could you not be babysiting? could they not be babysiting?
Perfecto
could I not have babysat? could you not have babysat? could he not have babysat? could we not have babysat? could you not have babysat? could they not have babysat?
Perfecto con V-ing
could I not have been babysiting? could you not have been babysiting? could he not have been babysiting? could we not have been babysiting? could you not have been babysiting? could they not have been babysiting?