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 can't sleep you can't sleep he can't sleep we can't sleep you can't sleep they can't sleep
Forma com V-ing
I can't be sleeping you can't be sleeping he can't be sleeping we can't be sleeping you can't be sleeping they can't be sleeping
Perfeito
I can't have slept you can't have slept he can't have slept we can't have slept you can't have slept they can't have slept
Perfeito com V-ing
I can't have been sleeping you can't have been sleeping he can't have been sleeping we can't have been sleeping you can't have been sleeping they can't 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't I sleep? can't you sleep? can't he sleep? can't we sleep? can't you sleep? can't they sleep?
Forma com V-ing
can't I be sleeping? can't you be sleeping? can't he be sleeping? can't we be sleeping? can't you be sleeping? can't they be sleeping?
Perfeito
can't I have slept? can't you have slept? can't he have slept? can't we have slept? can't you have slept? can't they have slept?
Perfeito com V-ing
can't I have been sleeping? can't you have been sleeping? can't he have been sleeping? can't we have been sleeping? can't you have been sleeping? can't they have been sleeping?