I could babysit you could babysit he could babysit we could babysit you could babysit they could babysit
Forma com 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
Perfeito
I could have babysat you could have babysat he could have babysat we could have babysat you could have babysat they could have babysat
Perfeito com 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
Negação
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 com 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
Perfeito
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
Perfeito com 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 com 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?
Perfeito
could I have babysat? could you have babysat? could he have babysat? could we have babysat? could you have babysat? could they have babysat?
Perfeito com 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-Negação
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 com 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?
Perfeito
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?
Perfeito com 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?