1. none 与 neither 比较：
none 表示“三者及以上都不”；neither 表示“两者都不”,与 both 相对.例句：
1) I went to see Jack and Tony yesterday, but neither was at home.
2) We were all very tired, but none of us stopped to have a rest.
2. either adj. , pron. & adv.
(1) either 意为“两者中的任何一个”,“两者之一”.例句：
1) There is coffee or tea, you can have either.
2)----When shall we meet, this evening or tomorrow morning?
----I don't mind. Either time is OK.
(2) either 意为“两者中的每一个”.下面几句意思相同：
1) There are lots of trees on either / each side of the road. = There are lots of trees on both sides of the road.
2) There are lots of trees on all sides of the lake.
（DAVID 整理提供）