I can sing you can sing he can sing we can sing you can sing they can sing
Forma con V-ing
I can be singing you can be singing he can be singing we can be singing you can be singing they can be singing
Perfecto
I can have sung you can have sung he can have sung we can have sung you can have sung they can have sung
Perfecto con V-ing
I can have been singing you can have been singing he can have been singing we can have been singing you can have been singing they can have been singing
Negación
Forma simple
I can't sing you can't sing he can't sing we can't sing you can't sing they can't sing
Forma con V-ing
I can't be singing you can't be singing he can't be singing we can't be singing you can't be singing they can't be singing
Perfecto
I can't have sung you can't have sung he can't have sung we can't have sung you can't have sung they can't have sung
Perfecto con V-ing
I can't have been singing you can't have been singing he can't have been singing we can't have been singing you can't have been singing they can't have been singing
Forma interrogativa
Forma simple
can I sing? can you sing? can he sing? can we sing? can you sing? can they sing?
Forma con V-ing
can I be singing? can you be singing? can he be singing? can we be singing? can you be singing? can they be singing?
Perfecto
can I have sung? can you have sung? can he have sung? can we have sung? can you have sung? can they have sung?
Perfecto con V-ing
can I have been singing? can you have been singing? can he have been singing? can we have been singing? can you have been singing? can they have been singing?
Forma interro-negativa
Forma simple
can't I sing? can't you sing? can't he sing? can't we sing? can't you sing? can't they sing?
Forma con V-ing
can't I be singing? can't you be singing? can't he be singing? can't we be singing? can't you be singing? can't they be singing?
Perfecto
can't I have sung? can't you have sung? can't he have sung? can't we have sung? can't you have sung? can't they have sung?
Perfecto con V-ing
can't I have been singing? can't you have been singing? can't he have been singing? can't we have been singing? can't you have been singing? can't they have been singing?