I can write you can write he can write we can write you can write they can write
Forma com V-ing
I can be writing you can be writing he can be writing we can be writing you can be writing they can be writing
Perfeito
I can have written you can have written he can have written we can have written you can have written they can have written
Perfeito com V-ing
I can have been writing you can have been writing he can have been writing we can have been writing you can have been writing they can have been writing
Negação
Forma simple
I cannot write you cannot write he cannot write we cannot write you cannot write they cannot write
Forma com V-ing
I cannot be writing you cannot be writing he cannot be writing we cannot be writing you cannot be writing they cannot be writing
Perfeito
I cannot have written you cannot have written he cannot have written we cannot have written you cannot have written they cannot have written
Perfeito com V-ing
I cannot have been writing you cannot have been writing he cannot have been writing we cannot have been writing you cannot have been writing they cannot have been writing
Forma interrogativa
Forma simple
can I write? can you write? can he write? can we write? can you write? can they write?
Forma com V-ing
can I be writing? can you be writing? can he be writing? can we be writing? can you be writing? can they be writing?
Perfeito
can I have written? can you have written? can he have written? can we have written? can you have written? can they have written?
Perfeito com V-ing
can I have been writing? can you have been writing? can he have been writing? can we have been writing? can you have been writing? can they have been writing?
Forma interro-Negação
Forma simple
can I not write? can you not write? can he not write? can we not write? can you not write? can they not write?
Forma com V-ing
can I not be writing? can you not be writing? can he not be writing? can we not be writing? can you not be writing? can they not be writing?
Perfeito
can I not have written? can you not have written? can he not have written? can we not have written? can you not have written? can they not have written?
Perfeito com V-ing
can I not have been writing? can you not have been writing? can he not have been writing? can we not have been writing? can you not have been writing? can they not have been writing?