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