Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could learn by you could learn by she could learn by we could learn by you could learn by they could learn by
V-ing form
I could be learn bying you could be learn bying she could be learn bying we could be learn bying you could be learn bying they could be learn bying
Perfect
I could have learn bied you could have learn bied she could have learn bied we could have learn bied you could have learn bied they could have learn bied
V-ing perfect
I could have been learn bying you could have been learn bying she could have been learn bying we could have been learn bying you could have been learn bying they could have been learn bying
Negation
Simple form
I could not learn by you could not learn by she could not learn by we could not learn by you could not learn by they could not learn by
V-ing form
I could not be learn bying you could not be learn bying she could not be learn bying we could not be learn bying you could not be learn bying they could not be learn bying
Perfect
I could not have learn bied you could not have learn bied she could not have learn bied we could not have learn bied you could not have learn bied they could not have learn bied
V-ing perfect
I could not have been learn bying you could not have been learn bying she could not have been learn bying we could not have been learn bying you could not have been learn bying they could not have been learn bying
Interrogative form
Simple form
could I learn by? could you learn by? could she learn by? could we learn by? could you learn by? could they learn by?
V-ing form
could I be learn bying? could you be learn bying? could she be learn bying? could we be learn bying? could you be learn bying? could they be learn bying?
Perfect
could I have learn bied? could you have learn bied? could she have learn bied? could we have learn bied? could you have learn bied? could they have learn bied?
V-ing perfect
could I have been learn bying? could you have been learn bying? could she have been learn bying? could we have been learn bying? could you have been learn bying? could they have been learn bying?
Interro-negative form
Simple form
could I not learn by? could you not learn by? could she not learn by? could we not learn by? could you not learn by? could they not learn by?
V-ing form
could I not be learn bying? could you not be learn bying? could she not be learn bying? could we not be learn bying? could you not be learn bying? could they not be learn bying?
Perfect
could I not have learn bied? could you not have learn bied? could she not have learn bied? could we not have learn bied? could you not have learn bied? could they not have learn bied?
V-ing perfect
could I not have been learn bying? could you not have been learn bying? could she not have been learn bying? could we not have been learn bying? could you not have been learn bying? could they not have been learn bying?