Form and rules
How it works
Use So + auxiliary/modal + subject after a positive statement: I am tired. So am I.
Use Neither + auxiliary/modal + subject after a negative statement: I don't drive. Neither do I.
Match the first sentence's verb: is → is, do → do, did → did, have → have, can → can, will → will.
Change the auxiliary when the new subject requires it: She has finished. So have they.
Me too and Me neither are common informal alternatives, but the so/neither pattern is useful for accurate auxiliary practice.