I can do you can do he can do we can do you can do they can do
Forma com V-ing
I can be doing you can be doing he can be doing we can be doing you can be doing they can be doing
Perfeito
I can have done you can have done he can have done we can have done you can have done they can have done
Perfeito com V-ing
I can have been doing you can have been doing he can have been doing we can have been doing you can have been doing they can have been doing
Negação
Forma simple
I can't do you can't do he can't do we can't do you can't do they can't do
Forma com V-ing
I can't be doing you can't be doing he can't be doing we can't be doing you can't be doing they can't be doing
Perfeito
I can't have done you can't have done he can't have done we can't have done you can't have done they can't have done
Perfeito com V-ing
I can't have been doing you can't have been doing he can't have been doing we can't have been doing you can't have been doing they can't have been doing
Forma interrogativa
Forma simple
can I do? can you do? can he do? can we do? can you do? can they do?
Forma com V-ing
can I be doing? can you be doing? can he be doing? can we be doing? can you be doing? can they be doing?
Perfeito
can I have done? can you have done? can he have done? can we have done? can you have done? can they have done?
Perfeito com V-ing
can I have been doing? can you have been doing? can he have been doing? can we have been doing? can you have been doing? can they have been doing?
Forma interro-Negação
Forma simple
can't I do? can't you do? can't he do? can't we do? can't you do? can't they do?
Forma com V-ing
can't I be doing? can't you be doing? can't he be doing? can't we be doing? can't you be doing? can't they be doing?
Perfeito
can't I have done? can't you have done? can't he have done? can't we have done? can't you have done? can't they have done?
Perfeito com V-ing
can't I have been doing? can't you have been doing? can't he have been doing? can't we have been doing? can't you have been doing? can't they have been doing?