高考英語二輪專題復(fù)習(xí)名詞性從句

1、歡迎下載學(xué)習(xí)好資料第11講名詞性從句It is uncertain side effect the medicine will bring about, although about two thousandpatients have taken it. (2010 浙江卷)A. thatB. whatC. howD. whether【答案及解析】1. B 考查主語從句引導(dǎo)詞。句意：這種藥將會(huì)帶來什么樣的副作用還不確定，雖然已有大約兩千人在吃這種藥。it為形式主語，side effect the medicine will bringabout 為真正的主語。還原句子：the medicine

2、 will bring about side effect , side effect前缺少一個(gè)修飾詞，故用whato一 Is there any possibility you could pick me up at the airport?一No problem. (2009 浙江卷)A. whenB. thatC. whetherD. what【答案及解析】2. B考查同位語從句的引導(dǎo)詞。句意為：“你有可能到機(jī)場來接我嗎？”“沒問題。you could pick me up at the airport是possibility的具體內(nèi)容，故是同位語。又因這個(gè) 從句不缺任何句子成分，故用t

3、hat引導(dǎo)。冬高頻考電引導(dǎo)名詞性從句的連接詞名詞性從句相當(dāng)于名詞，可分別作主句的主語、表語、賓語和同位語。因此，名詞性從 句分為主語從句、表語從句、賓語從句和同位從句。.連接代詞：who, whose, whom, what, which 。有詞義，在從句中充當(dāng)成分，如主語、表語、 賓語或定語等。.連接副詞：when, where, why, how。有詞義，在從句中充當(dāng)成分，作狀語。.連接詞：that, whether, if, as if。that無詞義，在從句中不充當(dāng)成分，有時(shí)可省略；if (whether),as if雖有詞義，但在從句中不充當(dāng)成分。注意：名詞性從句的語序陳述語序他是怎

4、么成功的仍然是個(gè)謎。How was he successful is still a puzzle. ( )xHow he was successful is still a puzzle. ( V)學(xué)習(xí)好資料歡迎下載主語從句的用法.主語從句在復(fù)合句中作主語。如：Who_will_go is not important.用it作形式主語，主語從句放在句末。如：It doesnt matter so much whether you will come or not. that引導(dǎo)主語從句時(shí)，不能省略。如：That_he_suddenly_fell_ill_last_week made us s

5、urprised.表語從句的用法.表語從句在復(fù)合句中作表語，位于系動(dòng)詞之后。如:The question was who_could_go_there.引導(dǎo)表語從句的連接詞that有時(shí)可省去。My idea is (that)_we_can_get_more_comrades_to_help_in_the_work.騰點(diǎn)而賓語從句的用法.賓語從句在復(fù)合句中作賓語。引導(dǎo)賓語從句的連詞that一般可省略。如:I hope (that) everything is all right.介詞之后的賓語從句，不可用 which或if連接，要分別用 what或whethero如:Im interested

6、 in whether youve finished the work.同位語從句的用法同位語從句在句中作某些抽象名詞的同位語，說明該名詞的具體內(nèi)容。這類抽象名詞有:problemideanewsproposalpossibilitywishchfLiicetruthinformationhopeadvicethoughl(ueslionfactsuggestionresultI have no idea when he will be back.The fact that he had not said anything surprised everybody.皆易錯(cuò)易混點(diǎn)歡迎下載學(xué)習(xí)好資料

7、. whether與if的區(qū)別(1)只能用if的情況賓語從句是否定句時(shí)，只用 if,不用whethero 如：I wonder if it doesnt rain.引導(dǎo)條件從句時(shí)，只能用 if,而不能用whethero如：Please come to see me if_you_have_time.(2)只能用whether的情況用if會(huì)引起誤解，就要用 whethero如：Please let me know whether you want to go.(此句如果把 whether改成if,容易當(dāng)成條件句理解)賓語從句中的 whether與or not直接連用，就不能換成 if;不直接連用

8、，可換。如：I dont know whether_or_not the report is true.I dont know whether/_if the report is true or not.介詞后的賓語從句要用whether引導(dǎo)。whether可與不定式連用。whether也可引導(dǎo)主語從句、表語從句、同位語從句，還可引導(dǎo)讓步狀語從句，以上均不能換成if。如：It depends on_whether we have enough time.They dont know whether_to_go there.名詞性從句中主句和從句的主謂一致(1)主語從句作主語相當(dāng)于單數(shù)第三人稱作

9、主語，謂語動(dòng)詞用單數(shù)。(2)如果由and連接兩個(gè)或兩個(gè)以上的主語從句作主語時(shí)，謂語動(dòng)詞用復(fù)數(shù)。(3)由兩個(gè)或多個(gè)連接詞引導(dǎo)一個(gè)主語從句，謂語動(dòng)詞用單數(shù)。When they will start and where they go have not been decided yet.When_and_where the party will be held has not been decided yet.疑問詞 + ever和no matter + 疑問詞的區(qū)別(1)疑問詞 + ever可引導(dǎo)名詞性從句，在主從句中要充當(dāng)一定的成分。如：Whoever breaks the rule must

10、be punished.(作主語)(2)疑問詞 + ever還可引導(dǎo)讓步狀語從句。如：Whoever breaks the rule, he must be punished.(3)no matter +疑問詞只能引導(dǎo)讓步狀語從句。No_matter_who breaks the rule, he must be punished.同位語從句和定語從句的區(qū)別定語從句是先行詞的修飾語，它不涉及先行詞的具體內(nèi)容。定語從句中that起連接作用，且充當(dāng)句子成分，作賓語時(shí)可省略。同位語從句表明中心詞的具體內(nèi)容。that在同位語從句中不作任何成分，只起連接作用，無具體含義，且不可省略。如：We expressed the hope that_they_had_expressed.(定語從句)We expressed the hope that_they_would_come_toChina_again.(同位語從句). it作形式主語的常用句型It is possible/important/necessary/clear/true that很可能 /重要的是 /必要的是 /很清楚/ 很對It is said/ reported/believed that 據(jù)說 /據(jù)報(bào)道It has been announced/declared