I could relearn you could relearn he could relearn we could relearn you could relearn they could relearn
V-ing form
I could be relearning you could be relearning he could be relearning we could be relearning you could be relearning they could be relearning
Perfect
I could have relearned you could have relearned he could have relearned we could have relearned you could have relearned they could have relearned
V-ing perfect
I could have been relearning you could have been relearning he could have been relearning we could have been relearning you could have been relearning they could have been relearning
Negation
Simple form
I could not relearn you could not relearn he could not relearn we could not relearn you could not relearn they could not relearn
V-ing form
I could not be relearning you could not be relearning he could not be relearning we could not be relearning you could not be relearning they could not be relearning
Perfect
I could not have relearned you could not have relearned he could not have relearned we could not have relearned you could not have relearned they could not have relearned
V-ing perfect
I could not have been relearning you could not have been relearning he could not have been relearning we could not have been relearning you could not have been relearning they could not have been relearning
Interrogative form
Simple form
could I relearn? could you relearn? could he relearn? could we relearn? could you relearn? could they relearn?
V-ing form
could I be relearning? could you be relearning? could he be relearning? could we be relearning? could you be relearning? could they be relearning?
Perfect
could I have relearned? could you have relearned? could he have relearned? could we have relearned? could you have relearned? could they have relearned?
V-ing perfect
could I have been relearning? could you have been relearning? could he have been relearning? could we have been relearning? could you have been relearning? could they have been relearning?
Interro-negative form
Simple form
could I not relearn? could you not relearn? could he not relearn? could we not relearn? could you not relearn? could they not relearn?
V-ing form
could I not be relearning? could you not be relearning? could he not be relearning? could we not be relearning? could you not be relearning? could they not be relearning?
Perfect
could I not have relearned? could you not have relearned? could he not have relearned? could we not have relearned? could you not have relearned? could they not have relearned?
V-ing perfect
could I not have been relearning? could you not have been relearning? could he not have been relearning? could we not have been relearning? could you not have been relearning? could they not have been relearning?