I can open you can open he can open we can open you can open they can open
Forma com V-ing
I can be opening you can be opening he can be opening we can be opening you can be opening they can be opening
Perfeito
I can have opened you can have opened he can have opened we can have opened you can have opened they can have opened
Perfeito com V-ing
I can have been opening you can have been opening he can have been opening we can have been opening you can have been opening they can have been opening
Negação
Forma simple
I can't open you can't open he can't open we can't open you can't open they can't open
Forma com V-ing
I can't be opening you can't be opening he can't be opening we can't be opening you can't be opening they can't be opening
Perfeito
I can't have opened you can't have opened he can't have opened we can't have opened you can't have opened they can't have opened
Perfeito com V-ing
I can't have been opening you can't have been opening he can't have been opening we can't have been opening you can't have been opening they can't have been opening
Forma interrogativa
Forma simple
can I open? can you open? can he open? can we open? can you open? can they open?
Forma com V-ing
can I be opening? can you be opening? can he be opening? can we be opening? can you be opening? can they be opening?
Perfeito
can I have opened? can you have opened? can he have opened? can we have opened? can you have opened? can they have opened?
Perfeito com V-ing
can I have been opening? can you have been opening? can he have been opening? can we have been opening? can you have been opening? can they have been opening?
Forma interro-Negação
Forma simple
can't I open? can't you open? can't he open? can't we open? can't you open? can't they open?
Forma com V-ing
can't I be opening? can't you be opening? can't he be opening? can't we be opening? can't you be opening? can't they be opening?
Perfeito
can't I have opened? can't you have opened? can't he have opened? can't we have opened? can't you have opened? can't they have opened?
Perfeito com V-ing
can't I have been opening? can't you have been opening? can't he have been opening? can't we have been opening? can't you have been opening? can't they have been opening?