I can walk you can walk he can walk we can walk you can walk they can walk
Forma com 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
Perfeito
I can have walked you can have walked he can have walked we can have walked you can have walked they can have walked
Perfeito com 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
Negação
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 com 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
Perfeito
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
Perfeito com 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 com 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?
Perfeito
can I have walked? can you have walked? can he have walked? can we have walked? can you have walked? can they have walked?
Perfeito com 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-Negação
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 com 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?
Perfeito
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?
Perfeito com 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?