题目内容
14．Both of my friends have already come．（变否定句）Neither of my friends has come yet．．分析 我的两个朋友都已经来了．
我的两个朋友都还没有来．
解答 答案：Neither of my friends has come yet．句中的both of表示两者都，否定两者都不用neither of…，故Neither of my friends 做主语谓语动词用单数，这里是现在完成时have/has+过去分词，故has，already是放在肯定句，否定句用yet放句末，故答案是Neither of my friends has come yet．
点评 作代词时，both指两人或两种事物，后面谓语动词用复数．neither，either通常被看作单数，其后谓语动词用单数．
Both of us are students．
Neither is mine．
Either of the magazine is interesting．
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