题目内容

【题目】There’s no way of knowing why one man makes an important discovery ________ another man, also intelligent, fails.

A.sinceB.ifC.asD.while

【答案】D

【解析】

考查并列连词。句意:为什么一个人会做出一个重要的发现,而另一个人,也很聪明,但是失败了。A. since自从;B. if如果;C. as因为;D. while然而。前后两句话为两种情况的对比,连词while表示对比。故选D

【知识拓展】

while的用法

while的意思有很多种,比如,当时,同时等,但是对于上下文的不同其表达的意思不同,下面就来讲解关于while连词的六种用法:

1.引导时间状语从句

译作……。例如:Make hay while the sun shines.趁着有太阳晒晒草。(乘机行事,抓紧时机。)

2.引导让步状语从句

常放在句首,译作尽管虽然,比although though语气要轻。例如: While I believe it is true, I cannot prove it.虽然我相信那是真的,但我无法证明。

3.引导条件状语从句

相当于as long as,译作只要。例如: While there is life, there is hope.有生命,就有希望。

4.引导原因状语从句

相当于since 既然的意思。例如:You'll never save any money while you're so extravagant.

你这么奢侈,永远存不下钱来。

5.连接并列句

表示对比,相当于whereas,译作可是。例如:Motion is absolute while stagnation is relative.

运动是绝对的,而静止是相对的。

6.连接并列句

表示递进,相当于and what is more, 译作并且而且。例如: Of course, I resolutely determined not to marry, while I quite forgot to consider at all that great rock of disaster in the working-class world-- sickness.当然, 我下定决心不结婚,而且把工人阶级的巨大灾难——疾病,也忘得一干二净。

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