I can unlearn you can unlearn he can unlearn we can unlearn you can unlearn they can unlearn
V-ing form
I can be unlearning you can be unlearning he can be unlearning we can be unlearning you can be unlearning they can be unlearning
Perfect
I can have unlearned you can have unlearned he can have unlearned we can have unlearned you can have unlearned they can have unlearned
V-ing perfect
I can have been unlearning you can have been unlearning he can have been unlearning we can have been unlearning you can have been unlearning they can have been unlearning
Negation
Simple form
I cannot unlearn you cannot unlearn he cannot unlearn we cannot unlearn you cannot unlearn they cannot unlearn
V-ing form
I cannot be unlearning you cannot be unlearning he cannot be unlearning we cannot be unlearning you cannot be unlearning they cannot be unlearning
Perfect
I cannot have unlearned you cannot have unlearned he cannot have unlearned we cannot have unlearned you cannot have unlearned they cannot have unlearned
V-ing perfect
I cannot have been unlearning you cannot have been unlearning he cannot have been unlearning we cannot have been unlearning you cannot have been unlearning they cannot have been unlearning
Interrogative form
Simple form
can I unlearn? can you unlearn? can he unlearn? can we unlearn? can you unlearn? can they unlearn?
V-ing form
can I be unlearning? can you be unlearning? can he be unlearning? can we be unlearning? can you be unlearning? can they be unlearning?
Perfect
can I have unlearned? can you have unlearned? can he have unlearned? can we have unlearned? can you have unlearned? can they have unlearned?
V-ing perfect
can I have been unlearning? can you have been unlearning? can he have been unlearning? can we have been unlearning? can you have been unlearning? can they have been unlearning?
Interro-negative form
Simple form
can I not unlearn? can you not unlearn? can he not unlearn? can we not unlearn? can you not unlearn? can they not unlearn?
V-ing form
can I not be unlearning? can you not be unlearning? can he not be unlearning? can we not be unlearning? can you not be unlearning? can they not be unlearning?
Perfect
can I not have unlearned? can you not have unlearned? can he not have unlearned? can we not have unlearned? can you not have unlearned? can they not have unlearned?
V-ing perfect
can I not have been unlearning? can you not have been unlearning? can he not have been unlearning? can we not have been unlearning? can you not have been unlearning? can they not have been unlearning?