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 couldn't relearn you couldn't relearn he couldn't relearn we couldn't relearn you couldn't relearn they couldn't relearn
V-ing form
I couldn't be relearning you couldn't be relearning he couldn't be relearning we couldn't be relearning you couldn't be relearning they couldn't be relearning
Perfect
I couldn't have relearned you couldn't have relearned he couldn't have relearned we couldn't have relearned you couldn't have relearned they couldn't have relearned
V-ing perfect
I couldn't have been relearning you couldn't have been relearning he couldn't have been relearning we couldn't have been relearning you couldn't have been relearning they couldn't 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
couldn't I relearn? couldn't you relearn? couldn't he relearn? couldn't we relearn? couldn't you relearn? couldn't they relearn?
V-ing form
couldn't I be relearning? couldn't you be relearning? couldn't he be relearning? couldn't we be relearning? couldn't you be relearning? couldn't they be relearning?
Perfect
couldn't I have relearned? couldn't you have relearned? couldn't he have relearned? couldn't we have relearned? couldn't you have relearned? couldn't they have relearned?
V-ing perfect
couldn't I have been relearning? couldn't you have been relearning? couldn't he have been relearning? couldn't we have been relearning? couldn't you have been relearning? couldn't they have been relearning?