I can busk you can busk he can busk we can busk you can busk they can busk
Forma con V-ing
I can be busking you can be busking he can be busking we can be busking you can be busking they can be busking
Perfecto
I can have busked you can have busked he can have busked we can have busked you can have busked they can have busked
Perfecto con V-ing
I can have been busking you can have been busking he can have been busking we can have been busking you can have been busking they can have been busking
Negación
Forma simple
I cannot busk you cannot busk he cannot busk we cannot busk you cannot busk they cannot busk
Forma con V-ing
I cannot be busking you cannot be busking he cannot be busking we cannot be busking you cannot be busking they cannot be busking
Perfecto
I cannot have busked you cannot have busked he cannot have busked we cannot have busked you cannot have busked they cannot have busked
Perfecto con V-ing
I cannot have been busking you cannot have been busking he cannot have been busking we cannot have been busking you cannot have been busking they cannot have been busking
Forma interrogativa
Forma simple
can I busk? can you busk? can he busk? can we busk? can you busk? can they busk?
Forma con V-ing
can I be busking? can you be busking? can he be busking? can we be busking? can you be busking? can they be busking?
Perfecto
can I have busked? can you have busked? can he have busked? can we have busked? can you have busked? can they have busked?
Perfecto con V-ing
can I have been busking? can you have been busking? can he have been busking? can we have been busking? can you have been busking? can they have been busking?
Forma interro-negativa
Forma simple
can I not busk? can you not busk? can he not busk? can we not busk? can you not busk? can they not busk?
Forma con V-ing
can I not be busking? can you not be busking? can he not be busking? can we not be busking? can you not be busking? can they not be busking?
Perfecto
can I not have busked? can you not have busked? can he not have busked? can we not have busked? can you not have busked? can they not have busked?
Perfecto con V-ing
can I not have been busking? can you not have been busking? can he not have been busking? can we not have been busking? can you not have been busking? can they not have been busking?