1
× I have two siblings but none of them lives here.
√ I have two siblings but neither of them lives here.
We use neither to talk about two people or things; for three or more, we use none.
2
× I miss your cookies. I haven’t tasted none like yours before.
√ I miss your cookies. I have tasted none like yours before.
None is a negative word, and we cannot use two negative words in the same sentence (not and none).
→ See NOTHING