I can walk you can walk he can walk we can walk you can walk they can walk
Forma con V-ing
I can be walking you can be walking he can be walking we can be walking you can be walking they can be walking
Perfecto
I can have walked you can have walked he can have walked we can have walked you can have walked they can have walked
Perfecto con V-ing
I can have been walking you can have been walking he can have been walking we can have been walking you can have been walking they can have been walking
Negación
Forma simple
I can't walk you can't walk he can't walk we can't walk you can't walk they can't walk
Forma con V-ing
I can't be walking you can't be walking he can't be walking we can't be walking you can't be walking they can't be walking
Perfecto
I can't have walked you can't have walked he can't have walked we can't have walked you can't have walked they can't have walked
Perfecto con V-ing
I can't have been walking you can't have been walking he can't have been walking we can't have been walking you can't have been walking they can't have been walking
Forma interrogativa
Forma simple
can I walk? can you walk? can he walk? can we walk? can you walk? can they walk?
Forma con V-ing
can I be walking? can you be walking? can he be walking? can we be walking? can you be walking? can they be walking?
Perfecto
can I have walked? can you have walked? can he have walked? can we have walked? can you have walked? can they have walked?
Perfecto con V-ing
can I have been walking? can you have been walking? can he have been walking? can we have been walking? can you have been walking? can they have been walking?
Forma interro-negativa
Forma simple
can't I walk? can't you walk? can't he walk? can't we walk? can't you walk? can't they walk?
Forma con V-ing
can't I be walking? can't you be walking? can't he be walking? can't we be walking? can't you be walking? can't they be walking?
Perfecto
can't I have walked? can't you have walked? can't he have walked? can't we have walked? can't you have walked? can't they have walked?
Perfecto con V-ing
can't I have been walking? can't you have been walking? can't he have been walking? can't we have been walking? can't you have been walking? can't they have been walking?