could unlearn
Regular verb: unlearn - unlearned- unlearned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could unlearn
you could unlearn
she could unlearn
we could unlearn
you could unlearn
they could unlearn 	I could be unlearning
you could be unlearning
she could be unlearning
we could be unlearning
you could be unlearning
they could be unlearning	I could have unlearned
you could have unlearned
she could have unlearned
we could have unlearned
you could have unlearned
they could have unlearned	I could have been unlearning
you could have been unlearning
she could have been unlearning
we could have been unlearning
you could have been unlearning
they could have been unlearning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't unlearn
you couldn't unlearn
she couldn't unlearn
we couldn't unlearn
you couldn't unlearn
they couldn't unlearn 	I couldn't be unlearning
you couldn't be unlearning
she couldn't be unlearning
we couldn't be unlearning
you couldn't be unlearning
they couldn't be unlearning	I couldn't have unlearned
you couldn't have unlearned
she couldn't have unlearned
we couldn't have unlearned
you couldn't have unlearned
they couldn't have unlearned	I couldn't have been unlearning
you couldn't have been unlearning
she couldn't have been unlearning
we couldn't have been unlearning
you couldn't have been unlearning
they couldn't have been unlearning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I unlearn?
could you unlearn?
could she unlearn?
could we unlearn?
could you unlearn?
could they unlearn? 	could I be unlearning?
could you be unlearning?
could she be unlearning?
could we be unlearning?
could you be unlearning?
could they be unlearning? 	could I have unlearned?
could you have unlearned?
could she have unlearned?
could we have unlearned?
could you have unlearned?
could they have unlearned? 	could I have been unlearning?
could you have been unlearning?
could she have been unlearning?
could we have been unlearning?
could you have been unlearning?
could they have been unlearning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I unlearn?
couldn't you unlearn?
couldn't she unlearn?
couldn't we unlearn?
couldn't you unlearn?
couldn't they unlearn? 	couldn't I be unlearning?
couldn't you be unlearning?
couldn't she be unlearning?
couldn't we be unlearning?
couldn't you be unlearning?
couldn't they be unlearning? 	couldn't I have unlearned?
couldn't you have unlearned?
couldn't she have unlearned?
couldn't we have unlearned?
couldn't you have unlearned?
couldn't they have unlearned? 	couldn't I have been unlearning?
couldn't you have been unlearning?
couldn't she have been unlearning?
couldn't we have been unlearning?
couldn't you have been unlearning?
couldn't they have been unlearning?