Many people agree that a（1）knowledge of English is a must in

来源：学生作业帮编辑：神马作文网作业帮分类：英语作业时间：2024/11/11 01:38:51

Many people agree that a（1）knowledge of English is a must in (2) international trade today.
(1)这里为什么用 a ,请从词法上解释,不要从意思上解释
（2）这里为什么不用介词
网上的答案我都不满意所以另外开帖,希望英语好的朋友帮忙解答一下

（1）在做这类理解的时候,就要查词典来确定一个词的意思
knowledge在这里并不表示知识,而表示知道,了解,掌握
have a knowledge of就是最常用的一个词组表示掌握某事,这个a是这个词组里的固定搭配
在这个句子里,掌握英语这个短语被拿来用作名词充当主语,所以去掉上面的动词have
所以这里并不是你理解的：知识不可数,不能加a
（2）句子里不是用了in嘛,为什么还问为什么不用介词...你想问的是为什么要用介词吧
从is a must可以看出,must这里也做名词,表示必须的事,用个in 加后面international trade这个抽象地点名词短语组成一个地点状语,表示掌握英语在国际交易中是必须的,从中文意思可以看出,在...中就是一个地点状语.
总的来说这个句子挺不错的,我们tutor说写作文的时候就要尽量用名词,这个句子里面把原来是动词的变为名词增加了句子的等级,一个是a knowledge of还有个就是must,多用名词短语可以增加你的作文分数哦~

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