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名詞定語(yǔ)從句

時(shí)間:2021-07-05 15:52:38 英語(yǔ) 我要投稿

名詞定語(yǔ)從句

  I don't know where the sound came from.我不知道聲音是從哪里來(lái)的.以下是小編為大家整理分享的名詞定語(yǔ)從句,歡迎閱讀參考。

  名詞定語(yǔ)從句

  名詞性從句包括賓語(yǔ)從句,表語(yǔ)從句,同位語(yǔ)從句,主語(yǔ)從句.定語(yǔ)從句不屬于名詞性從句.

  名詞性從句包括:主語(yǔ)從句、賓語(yǔ)從句、表語(yǔ)從句和同位語(yǔ)從句,多由連詞that,wh-疑問(wèn)詞或由what,whatever等關(guān)系代詞引導(dǎo).

  1.主語(yǔ)從句

  1)主語(yǔ)從句在句子中充當(dāng)主語(yǔ),句子的謂語(yǔ)動(dòng)詞用第三人稱單數(shù).如:

  What is happening outside does not concern us.外面發(fā)生的事與我們無(wú)關(guān).

  2)主語(yǔ)從句前的that不能省略,僅起連接作用,有時(shí)為了保持句子平衡,that從句后置,而由it作形式主語(yǔ).如:

  It is estimated that a round-trip to Mars would take more than a year.據(jù)估計(jì),飛到火星來(lái)回的時(shí)間要超過(guò)一年.

  2.賓語(yǔ)從句在句子中充當(dāng)賓語(yǔ).如:

  I don't know where the sound came from.我不知道聲音是從哪里來(lái)的.

  Don't be satisfied with what you have achieved.不要滿足于你已取得的成績(jī).

  3.當(dāng)從句放在系動(dòng)詞be,look,remain,seem等后,即構(gòu)成表語(yǔ)從句.如:

  The trouble is that I have lost his address.麻煩的是我弄丟了他的地址.

  It seems that as if it is going to snow.看起來(lái)天要下雪了.

  4.同位語(yǔ)從句

  1)同位語(yǔ)從句是對(duì)與之同位的名詞中心詞作進(jìn)一步解釋.能接同位語(yǔ)從句的常見(jiàn)名詞有:idea, fact, news, belief, hope, evidence, opinion, problem, truth, answer, proposal, theory, decision, discovery, problem, thought, certainty, likelihood, on condition that, on the ground, with the exception, in spite of the fact, on the pretence等.

  The news that he has passed the examination is exciting.他通過(guò)考試的消息令人振奮.

  I lent her the book on condition that she would return it before Sunday.我把書借給了她,條件是她在星期天之前還給我.

  2)同位語(yǔ)從句與定語(yǔ)從句的區(qū)別在于:定語(yǔ)從句是對(duì)先行詞加以修飾、限制,而同位語(yǔ)從句是為了說(shuō)明中心詞的具體內(nèi)容;that在定語(yǔ)從句中充當(dāng)成分,為關(guān)系代詞,而在同位語(yǔ)從句中不作任何成分,僅起連詞作用.如:

  The fact that we talked about is very important.我們討論的.情況非常重要.(定語(yǔ)從句)

  The fact that he succeeded in the experiment pleased everybody.他實(shí)驗(yàn)成功的事實(shí)使每個(gè)人都很高興.(同位語(yǔ)從句)

  5. whether與if在名詞性從句中的區(qū)別.

  if一般只用于引導(dǎo)賓語(yǔ)從句,而whether可引導(dǎo)包括賓語(yǔ)從句在內(nèi)的其他名詞性從句.

  1)連詞whether引導(dǎo)的主語(yǔ)從句、表語(yǔ)從句不能用if來(lái)替換.

  Whether he will attend the meeting is uncertain.他是否來(lái)參加會(huì)議并不確定.

  2)賓語(yǔ)從句中,whether常與or not搭配,可以說(shuō)whether or not,而不說(shuō)if or not.

  I don't care whether or not she will attend the meeting.她是否來(lái)參加會(huì)議,我不介意.

  3)whether可用在介詞后,或不定式前,if則不可.

  She doesn't know whether to get married now or wait.她不知道是現(xiàn)在結(jié)婚呢還是等等.

  4)在某些動(dòng)詞后面(如discuss)只能用whether,不用if.

  We discussed whether we should go on climbing.我們討論了是否繼續(xù)攀登.

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