So - to agree with a negative statement (not, never in the sentence)
-> repeat the auxiliary without not (HWW)
-> in case of a lexical verb (ZWW), use do/does/did without not
(depending on present simple/past simple/person)
I can't dance really well! Neither can I!
She hasn't done the best she could. Neither has he.
I didn't go on holiday his summer. Neither did I.
He never goes clubbing. Neither ...she
They don't like gossip magazines.Neither ... we.