I can sleep you can sleep he can sleep we can sleep you can sleep they can sleep
Forma com V-ing
I can be sleeping you can be sleeping he can be sleeping we can be sleeping you can be sleeping they can be sleeping
Perfeito
I can have slept you can have slept he can have slept we can have slept you can have slept they can have slept
Perfeito com V-ing
I can have been sleeping you can have been sleeping he can have been sleeping we can have been sleeping you can have been sleeping they can have been sleeping
Negação
Forma simple
I cannot sleep you cannot sleep he cannot sleep we cannot sleep you cannot sleep they cannot sleep
Forma com V-ing
I cannot be sleeping you cannot be sleeping he cannot be sleeping we cannot be sleeping you cannot be sleeping they cannot be sleeping
Perfeito
I cannot have slept you cannot have slept he cannot have slept we cannot have slept you cannot have slept they cannot have slept
Perfeito com V-ing
I cannot have been sleeping you cannot have been sleeping he cannot have been sleeping we cannot have been sleeping you cannot have been sleeping they cannot have been sleeping
Forma interrogativa
Forma simple
can I sleep? can you sleep? can he sleep? can we sleep? can you sleep? can they sleep?
Forma com V-ing
can I be sleeping? can you be sleeping? can he be sleeping? can we be sleeping? can you be sleeping? can they be sleeping?
Perfeito
can I have slept? can you have slept? can he have slept? can we have slept? can you have slept? can they have slept?
Perfeito com V-ing
can I have been sleeping? can you have been sleeping? can he have been sleeping? can we have been sleeping? can you have been sleeping? can they have been sleeping?
Forma interro-Negação
Forma simple
can I not sleep? can you not sleep? can he not sleep? can we not sleep? can you not sleep? can they not sleep?
Forma com V-ing
can I not be sleeping? can you not be sleeping? can he not be sleeping? can we not be sleeping? can you not be sleeping? can they not be sleeping?
Perfeito
can I not have slept? can you not have slept? can he not have slept? can we not have slept? can you not have slept? can they not have slept?
Perfeito com V-ing
can I not have been sleeping? can you not have been sleeping? can he not have been sleeping? can we not have been sleeping? can you not have been sleeping? can they not have been sleeping?