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 could not unlearn
you could not unlearn
he could not unlearn
we could not unlearn
you could not unlearn
they could not unlearn 	I could not be unlearning
you could not be unlearning
he could not be unlearning
we could not be unlearning
you could not be unlearning
they could not be unlearning	I could not have unlearned
you could not have unlearned
he could not have unlearned
we could not have unlearned
you could not have unlearned
they could not have unlearned	I could not have been unlearning
you could not have been unlearning
he could not have been unlearning
we could not have been unlearning
you could not have been unlearning
they could not 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 	
could I not unlearn?
could you not unlearn?
could he not unlearn?
could we not unlearn?
could you not unlearn?
could they not unlearn? 	could I not be unlearning?
could you not be unlearning?
could he not be unlearning?
could we not be unlearning?
could you not be unlearning?
could they not be unlearning? 	could I not have unlearned?
could you not have unlearned?
could he not have unlearned?
could we not have unlearned?
could you not have unlearned?
could they not have unlearned? 	could I not have been unlearning?
could you not have been unlearning?
could he not have been unlearning?
could we not have been unlearning?
could you not have been unlearning?
could they not have been unlearning?