When you agree with the speaker...
A: I like ice cream. B: Me, too. or
I do, too. or So do I.
A: I can play the piano. B: Me, too.
or I can, too. or So can I.
A: I am hungry. B: Me, too. or
I am, too. or So am I.
A: I don't like hamburgers. B: Me, either.
or Neither do I.
A: I can't cook. B: Me, either. or
Neither can I.
A: I'm not tired. B: Me either. or
Neither am I.
In the sentences above, a third person (C) would say the same
thing as the second person (B)
When you don't agree with the speaker...
A: I love fried fish. B: I don't.
C: I don't either. or Neither do I.
A: I am tall. B: I'm not. C:
I'm not either. or Neither am I.
A: I can sing. B: I can't. C:
I can't either. or Neither can I.
A: I don't like chocolate. B: I do.
C: I do, too.
A: I'm not Canadian. B: I am. C:
I am, too.
A: I can't speak English. B: I can.
C: I can, too.
Note- there may be a few other possible ways to answer these
questions.