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 couldn't babysit you couldn't babysit he couldn't babysit we couldn't babysit you couldn't babysit they couldn't babysit
Forma con V-ing
I couldn't be babysiting you couldn't be babysiting he couldn't be babysiting we couldn't be babysiting you couldn't be babysiting they couldn't be babysiting
Perfecto
I couldn't have babysat you couldn't have babysat he couldn't have babysat we couldn't have babysat you couldn't have babysat they couldn't have babysat
Perfecto con V-ing
I couldn't have been babysiting you couldn't have been babysiting he couldn't have been babysiting we couldn't have been babysiting you couldn't have been babysiting they couldn't 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
couldn't I babysit? couldn't you babysit? couldn't he babysit? couldn't we babysit? couldn't you babysit? couldn't they babysit?
Forma con V-ing
couldn't I be babysiting? couldn't you be babysiting? couldn't he be babysiting? couldn't we be babysiting? couldn't you be babysiting? couldn't they be babysiting?
Perfecto
couldn't I have babysat? couldn't you have babysat? couldn't he have babysat? couldn't we have babysat? couldn't you have babysat? couldn't they have babysat?
Perfecto con V-ing
couldn't I have been babysiting? couldn't you have been babysiting? couldn't he have been babysiting? couldn't we have been babysiting? couldn't you have been babysiting? couldn't they have been babysiting?