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2022-07-01
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表语从句基本用法知识点精析精练 表语从句只能置于主句之后，而主句的动词只能是联系动词。 名词性从句在be等系动词后作表语时被称为表语从句， 例如： The problem is how we can get the things we need.问题是我们怎样能弄到我们需要的东西。(how 在表语从句中充当方式状语)// The scissors are not what I need. 这把剪刀不是我所需要的。(what 在表语从句中充当宾语)// What I told him was that I would find him a good play. 我告诉他的是我会给他找个好剧本。(what在主语从句中作直接宾语， that作为表语从句的引导词在该表语从句中不充当句子成分， 不能省略)// That is what I want to tell you.那就是我想要对你讲的。(what在表语从句中充当直接宾语)// That is why she failed to pass the exam. 那就是她考试不及格的原因。(why 在表语从句中充当原因状语) 注意： “That is why...”是常用句型， 意为“这就是……的原因/因此……”， 其中why引导的名词性从句在句中作表语， 该句型通常用于针对前面已经说明过的原因进行总结， 又如： That is why you see this old woman before you know, Jeanne. 珍妮， 这就是现在这个老太婆出现在你面前的原因。(前文提到Jeanne对老妇人显得苍老憔悴深感诧异， 说话人对她讲述了其中的原因之后，用这一句来进行概括)。// That is why I came. 这就是我来的原因。 下面是两个与“That is why...”形式相似的结构， 它们与“That is why...”结构之间的关系要能够辨析清楚： (1)“That is why...”与“That is the reason why...”同义， 只不过从语法结构上讲， “That is the reason why...”中why引导的是—个定语从句， 将其中的the reason去掉则与“That is why...”结构一样， 例如： That is (the reason) why I cannot agree. 这就是我不能同意的理由。
高中英语单词表3500词必背 He had seen the film before. That is why he did not see it last night.他以前曾看过那部电影， 因此他昨天晚上没有去看。(第一句话说明原因， 第二句话说明结果) 1. When and why he came here ________ yet. A. is not known B. are not known C. has not known D. have not bee 2.I wonder how much ________. A. does the watch cost B. did the watch cost C. the watch costed D. the watch costs 3. Mary is ________ someone might recognize her. A. afraid of B. afraid about C. afraid that D. afraid for 4.________ is no reason for dismissing her. A. Because she was a few minutes late B. Owing to a few minutes late C. The fact that she was a few minutes late D. Being a few minutes late 5. They came to the conclusion ________ by a computer. A. that not all things can be done B. because of not all things be done C. being not all things can be done D. because not all things can be done 6. Why the explosion occurred was ________ the laboratory attendant had been careless. A. for B. because C. since D. that 7. I don't doubt ________ he'll come. A. that B. if C. what D. whether 8. "Why did you go to the wrong class, Mr. Wang " "Well, I forget _______ I was supposed to go to." A. which the room B. which room C. what was the room D. what room was it 9. Output is now six times ________ it was before liberation. A. that B. which C. what D. of which 10. Mary: Helen is a mere washer woman, yet she's now buying a big house. Carol: Yes. Because she's always saved ________. A. what little she earns B. how little she earns C. for little she earns D. with little she earns 答案 1-5.ADCCA 6-10.DABCA 
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