I can work you can work he can work we can work you can work they can work
Forma com V-ing
I can be working you can be working he can be working we can be working you can be working they can be working
Perfeito
I can have worked you can have worked he can have worked we can have worked you can have worked they can have worked
Perfeito com V-ing
I can have been working you can have been working he can have been working we can have been working you can have been working they can have been working
Negação
Forma simple
I can't work you can't work he can't work we can't work you can't work they can't work
Forma com V-ing
I can't be working you can't be working he can't be working we can't be working you can't be working they can't be working
Perfeito
I can't have worked you can't have worked he can't have worked we can't have worked you can't have worked they can't have worked
Perfeito com V-ing
I can't have been working you can't have been working he can't have been working we can't have been working you can't have been working they can't have been working
Forma interrogativa
Forma simple
can I work? can you work? can he work? can we work? can you work? can they work?
Forma com V-ing
can I be working? can you be working? can he be working? can we be working? can you be working? can they be working?
Perfeito
can I have worked? can you have worked? can he have worked? can we have worked? can you have worked? can they have worked?
Perfeito com V-ing
can I have been working? can you have been working? can he have been working? can we have been working? can you have been working? can they have been working?
Forma interro-Negação
Forma simple
can't I work? can't you work? can't he work? can't we work? can't you work? can't they work?
Forma com V-ing
can't I be working? can't you be working? can't he be working? can't we be working? can't you be working? can't they be working?
Perfeito
can't I have worked? can't you have worked? can't he have worked? can't we have worked? can't you have worked? can't they have worked?
Perfeito com V-ing
can't I have been working? can't you have been working? can't he have been working? can't we have been working? can't you have been working? can't they have been working?