can sleep
Irregular verb: sleep - slept- slept

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can sleep
you can sleep
she can sleep
we can sleep
you can sleep
they can sleep 	I can be sleeping
you can be sleeping
she can be sleeping
we can be sleeping
you can be sleeping
they can be sleeping	I can have slept
you can have slept
she 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
she 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 	Perfect 	V-ing perfect 	
I can't sleep
you can't sleep
she 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
she can't be sleeping
we can't be sleeping
you can't be sleeping
they can't be sleeping	I can't have slept
you can't have slept
she 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
she 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 	Perfect 	V-ing perfect 	
can I sleep?
can you sleep?
can she sleep?
can we sleep?
can you sleep?
can they sleep? 	can I be sleeping?
can you be sleeping?
can she be sleeping?
can we be sleeping?
can you be sleeping?
can they be sleeping? 	can I have slept?
can you have slept?
can she 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 she 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 	Perfect 	V-ing perfect 	
can't I sleep?
can't you sleep?
can't she 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 she be sleeping?
can't we be sleeping?
can't you be sleeping?
can't they be sleeping? 	can't I have slept?
can't you have slept?
can't she 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 she have been sleeping?
can't we have been sleeping?
can't you have been sleeping?
can't they have been sleeping?