英语单复数问题Nobody except Xiao Liu and Xiao Wang knows her parent

来源：学生作业帮编辑：灵鹊做题网作业帮分类：英语作业时间：2024/04/30 03:28:33

英语单复数问题
Nobody except Xiao Liu and Xiao Wang knows her parents.
What we need at present is science and technology.
Reading English magazine and novel is helpful to youe study of English.
Our master and group leader often helps us.
我想问下except 是强调前面的,还是后面的,为什么要用knows；
是不是因为科学和技术不可数就用is；
第三句为什么用is;
第四句既然有and,为什么不是help,而是三单形式?

1.except 接的成分是插入语的性质,谓语看主语.
在本文章,except 是强调前面的.主语是nobody,所以后面用knows.
2.“Reading English magazine and novel ”这是一个典型的分词结构,谓语是要用单数的.
意思是“阅读英语杂志和小说”这件事对学习有帮助.
3.看and前后接的是什么成分.如果是修饰同一种事物的,那谓语用单数；
但是如果是修饰两个事物的,那谓语用复数.
本句的and是修饰同一事物,所以用单数.
Our master and group leader我们的班主任兼小组指导员
这是同一概念,所以谓语用helps.

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