could unlearn
Regular verb: unlearn - unlearned- unlearned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could unlearn
you could unlearn
he could unlearn
we could unlearn
you could unlearn
they could unlearn 	I could be unlearning
you could be unlearning
he could be unlearning
we could be unlearning
you could be unlearning
they could be unlearning	I could have unlearned
you could have unlearned
he 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
he 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
he 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
he 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
he 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
he 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 he unlearn?
could we unlearn?
could you unlearn?
could they unlearn? 	could I be unlearning?
could you be unlearning?
could he be unlearning?
could we be unlearning?
could you be unlearning?
could they be unlearning? 	could I have unlearned?
could you have unlearned?
could he 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 he 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 he 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 he 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 he 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 he have been unlearning?
couldn't we have been unlearning?
couldn't you have been unlearning?
couldn't they have been unlearning?