1) either指兩者中的任何一個，neither指兩者都不。作代詞時，either, neither一般接單數(shù)動詞。作限定詞時，一般加單數(shù)名詞。
【例如】
Either of them will be appointed Minister of Finance.Neither of the two speaks English well.You must not favor either side in the dispute.In neither case can I agree with you.
2) either...or表示兩個或多個選擇中的一項。neither...nor表示“既不，也不”。either...or, neither...nor連接的兩個名詞或代詞作主語時，謂語動詞與最靠近它的主語一致。
【例如】
He neither knows nor cares what has happened.Neither he nor I have met such a beautiful girl before.He must be either mad or drunk.Either she or you are to be blamed for what has happened.
3) either表示也不，用于否定句。(too表示“也”，用于肯定句。)
【例如】
I don't like the yellow shirt, I don't like the green one, either.
4) neither可以引導倒裝句，表示和前面的情況一致，而且前面為否定句。
【例如】
The organization had broken no rules, but______had it acted responsibly. (CET-4 1996,1)A) neither B) so C) either D) bothneither引導倒裝句，表示和前面的否定情況一致。so引導倒裝句，表示和前面的肯定情況一致。either表示兩者中的一個，both表示兩者都。答案為A.
【例如】
Either of them will be appointed Minister of Finance.Neither of the two speaks English well.You must not favor either side in the dispute.In neither case can I agree with you.
2) either...or表示兩個或多個選擇中的一項。neither...nor表示“既不，也不”。either...or, neither...nor連接的兩個名詞或代詞作主語時，謂語動詞與最靠近它的主語一致。
【例如】
He neither knows nor cares what has happened.Neither he nor I have met such a beautiful girl before.He must be either mad or drunk.Either she or you are to be blamed for what has happened.
3) either表示也不，用于否定句。(too表示“也”，用于肯定句。)
【例如】
I don't like the yellow shirt, I don't like the green one, either.
4) neither可以引導倒裝句，表示和前面的情況一致，而且前面為否定句。
【例如】
The organization had broken no rules, but______had it acted responsibly. (CET-4 1996,1)A) neither B) so C) either D) bothneither引導倒裝句，表示和前面的否定情況一致。so引導倒裝句，表示和前面的肯定情況一致。either表示兩者中的一個，both表示兩者都。答案為A.