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名詞性從句 Noun clauses,名詞性從句是由if, whether, that 和各種疑問(wèn)詞充當(dāng)連接詞所引導(dǎo)的從句,其作用同名詞一樣。包括 主語(yǔ)從句,賓語(yǔ)從句,表語(yǔ)從句和 同位語(yǔ)從句。,一主語(yǔ)從句 主語(yǔ)從句是在復(fù)合句中充當(dāng)主語(yǔ)的從句,通常放在主句謂語(yǔ)動(dòng)詞之前或由形式主語(yǔ)it代替,而本身放在句子末尾。 1. It 作形式主語(yǔ)和it引導(dǎo)強(qiáng)調(diào)句的比較 It 作形式主語(yǔ)代替主語(yǔ)從句,主要是為了平衡句子結(jié)構(gòu),主語(yǔ)從句的連接詞沒(méi)有變化。而it引導(dǎo)的強(qiáng)調(diào)句則是對(duì)句子某一部分進(jìn)行強(qiáng)調(diào),無(wú)論強(qiáng)調(diào)的是什么成分,都可用連詞that。被強(qiáng)調(diào)部分指人是也可用who。例如: It is a pity that you didnt go to see the film. It doesnt interest me whether you succeed or not. It is in the morning that the murder took place. (=In the morning the murder took place.) It is John that broke the window. (=John broke the window.),2. 用it 作形式主語(yǔ)的結(jié)構(gòu) (1) It is 名詞從句 It is a fact that 事實(shí)是 It is an honor that 非常榮幸 It is common knowledge that 是常識(shí) (2) It is 形容詞從句 It is natural that 很自然 It is strange that 奇怪的是,(3) It is 不及物動(dòng)詞從句 It seems that 似乎 It happened that 碰巧 (4) It is/was+過(guò)去分詞從句 It is reported that 據(jù)報(bào)道 It has been proved that 已證實(shí) It is said/thought/hoped/told/believed +that.,3. 主語(yǔ)從句不可位于句首的五種情況 (1) It is said , (reported) 結(jié)構(gòu)中的主語(yǔ)從句不可提前。例如: It is said that President Bush will visit our country next week. (right) That President Jiang will visit our school next week is said. (wrong) (2) It happens that, It occurs that 結(jié)構(gòu)中的“that”從句不可提前。例如: It occurred to him that he failed in the examination. (right) That he failed in the examination occurred to him. (wrong),(3) It doesnt matter how/whether 結(jié)構(gòu)中的主語(yǔ)從句不可提前。例如: It doesnt matter whether he is wrong or not. (right) Whether he is wrong or not doesnt matter. (wrong) (4) 含主語(yǔ)從句的復(fù)合句是疑問(wèn)句時(shí),主語(yǔ)從句不可提前。例如: Is it likely that it will rain in the evening? (right) Is that will rain in the evening likely? (wrong),2. 作介詞的賓語(yǔ) 例如:Our success depends on how well we can cooperate with one another. 3. 作形容詞的賓語(yǔ) 例如:I am afraid (that) Ive made a mistake. that 引導(dǎo)的從句常跟在下列形容詞后作賓語(yǔ): anxious, sure, confident, determined, glad, proud, surprised, worried, sorry, thankful, ashamed, disappointed, pleased, satisfied, content 等。也可以將此類(lèi)詞后的that 從句的看作原因狀語(yǔ)從句。,4. It 可以作為形式賓語(yǔ) It 不僅可以作為形式主語(yǔ),還可以作為形式賓語(yǔ)而真正的賓語(yǔ)that 從句則放在句尾,特別是在帶復(fù)合賓語(yǔ)的句子中。 例如: We must make it clear to the public that we are doing an important job.,7. 否定的轉(zhuǎn)移 若主句謂語(yǔ)動(dòng)詞為think, consider, suppose, believe, expect, guess, imagine等,其后的賓語(yǔ)從句若含有否定意義,一般要把否定詞轉(zhuǎn)移到主句謂語(yǔ)上,從句謂語(yǔ)用肯定式。例如: I dont think this dress fits you well.(我認(rèn)為這件衣服不適合你穿。),三表語(yǔ)從句 表語(yǔ)從句在復(fù)合句中作表語(yǔ)的名詞性從句,放在系動(dòng)詞之后,一般結(jié)構(gòu)是“主語(yǔ)連系動(dòng)詞表語(yǔ)從句”??梢越颖碚Z(yǔ)從句的連系動(dòng)詞有be, look, remain, seem等.另外,常用的還有the reason is that 和It is because 等結(jié)構(gòu)。例如: 1) The question is whether we can make good preparation in such a short time. 2) This is why we cant get the support of the people 3) But the fact remains that we are behind the other classes. 4) The reason why he is late for school is that he missed the early bus.,四同位語(yǔ)從句 同位語(yǔ)從句就是在復(fù)合句中作名詞的同位語(yǔ)的名詞性從句。 1. 同位語(yǔ)從句的功能 同位語(yǔ)從句對(duì)于名詞進(jìn)一步解釋?zhuān)f(shuō)明名詞的具體內(nèi)容,一般由that引導(dǎo),例如: 1) The kings decision that the prisoner would be set free surprised all the people. 2) The order that all the soldiers should stay still is given by the general.,1) The news that he told me is that Tom would go ab

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