题目内容
14．Both of Mary's parents work in this hospital．（改为否定句）Neither of Mary's parentsworks in this hospital．
分析 玛丽的父母都在这家医院上班．
玛丽的父母都不在这家医院上班．
解答 答案：Neither，works．both表示两者都，反义词是neither两者都不，neither of+名词作主语时，谓语动词用单数，这里是表达客观事实用一般现在时，work的三单works，故答案是Neither，works．
点评 either （of）和neither （of）结构，从语法标记看，是单数形式；而从词汇意义的角度看，亦可理解为单数概念，所以根据"语法一致原则"和"概念一致原则"，谓语动词采用单数形式，．例如：
If either of you cares to call，I'll be in this morning．
In all the years we've been married neither of us has made jokes．
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