I can write you can write she can write we can write you can write they can write
Forma con V-ing
I can be writing you can be writing she can be writing we can be writing you can be writing they can be writing
Perfecto
I can have written you can have written she can have written we can have written you can have written they can have written
Perfecto con V-ing
I can have been writing you can have been writing she can have been writing we can have been writing you can have been writing they can have been writing
Negación
Forma simple
I cannot write you cannot write she cannot write we cannot write you cannot write they cannot write
Forma con V-ing
I cannot be writing you cannot be writing she cannot be writing we cannot be writing you cannot be writing they cannot be writing
Perfecto
I cannot have written you cannot have written she cannot have written we cannot have written you cannot have written they cannot have written
Perfecto con V-ing
I cannot have been writing you cannot have been writing she 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 she write? can we write? can you write? can they write?
Forma con V-ing
can I be writing? can you be writing? can she be writing? can we be writing? can you be writing? can they be writing?
Perfecto
can I have written? can you have written? can she have written? can we have written? can you have written? can they have written?
Perfecto con V-ing
can I have been writing? can you have been writing? can she have been writing? can we have been writing? can you have been writing? can they have been writing?
Forma interro-negativa
Forma simple
can I not write? can you not write? can she not write? can we not write? can you not write? can they not write?
Forma con V-ing
can I not be writing? can you not be writing? can she not be writing? can we not be writing? can you not be writing? can they not be writing?
Perfecto
can I not have written? can you not have written? can she not have written? can we not have written? can you not have written? can they not have written?
Perfecto con V-ing
can I not have been writing? can you not have been writing? can she not have been writing? can we not have been writing? can you not have been writing? can they not have been writing?