could sleave
Regular verb: sleave - sleaved- sleaved

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could sleave
you could sleave
she could sleave
we could sleave
you could sleave
they could sleave 	I could be sleaving
you could be sleaving
she could be sleaving
we could be sleaving
you could be sleaving
they could be sleaving	I could have sleaved
you could have sleaved
she could have sleaved
we could have sleaved
you could have sleaved
they could have sleaved	I could have been sleaving
you could have been sleaving
she could have been sleaving
we could have been sleaving
you could have been sleaving
they could have been sleaving	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not sleave
you could not sleave
she could not sleave
we could not sleave
you could not sleave
they could not sleave 	I could not be sleaving
you could not be sleaving
she could not be sleaving
we could not be sleaving
you could not be sleaving
they could not be sleaving	I could not have sleaved
you could not have sleaved
she could not have sleaved
we could not have sleaved
you could not have sleaved
they could not have sleaved	I could not have been sleaving
you could not have been sleaving
she could not have been sleaving
we could not have been sleaving
you could not have been sleaving
they could not have been sleaving	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I sleave?
could you sleave?
could she sleave?
could we sleave?
could you sleave?
could they sleave? 	could I be sleaving?
could you be sleaving?
could she be sleaving?
could we be sleaving?
could you be sleaving?
could they be sleaving? 	could I have sleaved?
could you have sleaved?
could she have sleaved?
could we have sleaved?
could you have sleaved?
could they have sleaved? 	could I have been sleaving?
could you have been sleaving?
could she have been sleaving?
could we have been sleaving?
could you have been sleaving?
could they have been sleaving? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not sleave?
could you not sleave?
could she not sleave?
could we not sleave?
could you not sleave?
could they not sleave? 	could I not be sleaving?
could you not be sleaving?
could she not be sleaving?
could we not be sleaving?
could you not be sleaving?
could they not be sleaving? 	could I not have sleaved?
could you not have sleaved?
could she not have sleaved?
could we not have sleaved?
could you not have sleaved?
could they not have sleaved? 	could I not have been sleaving?
could you not have been sleaving?
could she not have been sleaving?
could we not have been sleaving?
could you not have been sleaving?
could they not have been sleaving?