English verb conjugation
CAN SLEEP

Irregular verb: sleep - slept - slept

Affirmation

Simple form	V-ing form
I can sleep you can sleep he can sleep we can sleep you can sleep they can sleep	I can be sleeping you can be sleeping he can be sleeping we can be sleeping you can be sleeping they can be sleeping
Perfect	V-ing perfect
I can have slept you can have slept he can have slept we can have slept you can have slept they can have slept	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

Negation

Simple form	V-ing form
I can't sleep you can't sleep he can't sleep we can't sleep you can't sleep they can't sleep	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
Perfect	V-ing perfect
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	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

Interrogative form

Simple form	V-ing form
can I sleep? can you sleep? can he sleep? can we sleep? can you sleep? can they sleep?	can I be sleeping? can you be sleeping? can he be sleeping? can we be sleeping? can you be sleeping? can they be sleeping?
Perfect	V-ing perfect
can I have slept? can you have slept? can he have slept? can we have slept? can you have slept? can they have slept?	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?

Interro-negative form

Simple form	V-ing form
can't I sleep? can't you sleep? can't he sleep? can't we sleep? can't you sleep? can't they sleep?	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?
Perfect	V-ing perfect
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?	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?