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).

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