could lyse
Regular verb: lyse - lysed- lysed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could lyse
you could lyse
she could lyse
we could lyse
you could lyse
they could lyse 	I could be lysing
you could be lysing
she could be lysing
we could be lysing
you could be lysing
they could be lysing	I could have lysed
you could have lysed
she could have lysed
we could have lysed
you could have lysed
they could have lysed	I could have been lysing
you could have been lysing
she could have been lysing
we could have been lysing
you could have been lysing
they could have been lysing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't lyse
you couldn't lyse
she couldn't lyse
we couldn't lyse
you couldn't lyse
they couldn't lyse 	I couldn't be lysing
you couldn't be lysing
she couldn't be lysing
we couldn't be lysing
you couldn't be lysing
they couldn't be lysing	I couldn't have lysed
you couldn't have lysed
she couldn't have lysed
we couldn't have lysed
you couldn't have lysed
they couldn't have lysed	I couldn't have been lysing
you couldn't have been lysing
she couldn't have been lysing
we couldn't have been lysing
you couldn't have been lysing
they couldn't have been lysing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I lyse?
could you lyse?
could she lyse?
could we lyse?
could you lyse?
could they lyse? 	could I be lysing?
could you be lysing?
could she be lysing?
could we be lysing?
could you be lysing?
could they be lysing? 	could I have lysed?
could you have lysed?
could she have lysed?
could we have lysed?
could you have lysed?
could they have lysed? 	could I have been lysing?
could you have been lysing?
could she have been lysing?
could we have been lysing?
could you have been lysing?
could they have been lysing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I lyse?
couldn't you lyse?
couldn't she lyse?
couldn't we lyse?
couldn't you lyse?
couldn't they lyse? 	couldn't I be lysing?
couldn't you be lysing?
couldn't she be lysing?
couldn't we be lysing?
couldn't you be lysing?
couldn't they be lysing? 	couldn't I have lysed?
couldn't you have lysed?
couldn't she have lysed?
couldn't we have lysed?
couldn't you have lysed?
couldn't they have lysed? 	couldn't I have been lysing?
couldn't you have been lysing?
couldn't she have been lysing?
couldn't we have been lysing?
couldn't you have been lysing?
couldn't they have been lysing?