I could bus you could bus he could bus we could bus you could bus they could bus
Forma con V-ing
I could be bussing you could be bussing he could be bussing we could be bussing you could be bussing they could be bussing
Perfecto
I could have bussed you could have bussed he could have bussed we could have bussed you could have bussed they could have bussed
Perfecto con V-ing
I could have been bussing you could have been bussing he could have been bussing we could have been bussing you could have been bussing they could have been bussing
Negación
Forma simple
I couldn't bus you couldn't bus he couldn't bus we couldn't bus you couldn't bus they couldn't bus
Forma con V-ing
I couldn't be bussing you couldn't be bussing he couldn't be bussing we couldn't be bussing you couldn't be bussing they couldn't be bussing
Perfecto
I couldn't have bussed you couldn't have bussed he couldn't have bussed we couldn't have bussed you couldn't have bussed they couldn't have bussed
Perfecto con V-ing
I couldn't have been bussing you couldn't have been bussing he couldn't have been bussing we couldn't have been bussing you couldn't have been bussing they couldn't have been bussing
Forma interrogativa
Forma simple
could I bus? could you bus? could he bus? could we bus? could you bus? could they bus?
Forma con V-ing
could I be bussing? could you be bussing? could he be bussing? could we be bussing? could you be bussing? could they be bussing?
Perfecto
could I have bussed? could you have bussed? could he have bussed? could we have bussed? could you have bussed? could they have bussed?
Perfecto con V-ing
could I have been bussing? could you have been bussing? could he have been bussing? could we have been bussing? could you have been bussing? could they have been bussing?
Forma interro-negativa
Forma simple
couldn't I bus? couldn't you bus? couldn't he bus? couldn't we bus? couldn't you bus? couldn't they bus?
Forma con V-ing
couldn't I be bussing? couldn't you be bussing? couldn't he be bussing? couldn't we be bussing? couldn't you be bussing? couldn't they be bussing?
Perfecto
couldn't I have bussed? couldn't you have bussed? couldn't he have bussed? couldn't we have bussed? couldn't you have bussed? couldn't they have bussed?
Perfecto con V-ing
couldn't I have been bussing? couldn't you have been bussing? couldn't he have been bussing? couldn't we have been bussing? couldn't you have been bussing? couldn't they have been bussing?