高一英语名词性从句讲解
名词性从句
1.种类
2.宾语从句的时态。
3.that什么情况下可以省略，什么情况下不可以省略。
4.whether和if什么时候可以互换，什么时候不可以互换。
5.如何区分同位语从句与定语从句。
1.______thebabycouldspeakmadehisparentsveryhappy.
2.Iwonder______youwillgoshoppingorstayathome.
3.Thisis______hewasoftenlateforschool.
4.Weallknowthetruth______theearth______aroundthesun.
一．名词性从句的概念：一个句子在连接词的引导下，在句子中起名词作用的句子叫名词性从句。
Hisjobisimportant.(主语)
Whathedoesisimportant.(主语)
Thisishisjob.(表语)
Thisiswhathedoeseveryday.(表语)
Idon’t likehisjob.(宾语)
Idon’t likewhathedoeseveryday.(宾语)
Idon’tknowabout thefactthatheisateacher.(同位语)
Idon’tknowabout theman,Mr.White.(同位语)
得出结论：因此根据它在句中不同的语法功能，名词从句又可分为四类，即：主语从句、宾语从句、表语从句和同位语从句。
三．引导名词性从句的连接词：
1、连接代词：who,whoever,whose,whom,whomever,what,which。有词义，在从句中担任成分，如主语、表语、宾语、或定语等。
●Idon’tbelieve__________hehasachievedsofar.
●__________breaksthelawshouldbepunished.
2、连接副词：when,where,why,how。有词义，在从句中担任成分，作状语。
●__________wewillhandintheprojectwillbediscussedlater.
●Parentsarethoughttounderstand__________importanteducationistotheirchildren’sfuture.
●Thereason__________hewasabsentwasthathewasill.
3、连接词：that,whether,if,asif,asthough。that无词义，在从句中不担任成分，有时可省略；if(whether),asif虽有词义，但在从句中不担任成分。
●Idon’tcareabout__________youhavemoneyornot.
●Theproblemis__________Tomisabletoarriveontime.
●__________themeetingwillbeheldhereisnotdecidedyet.
●Itlooks__________itisgoingtorain.
●Thetruthis__________hedidn’tcomefortheconcert.
●__________theearthisroundistrue.
四．名词性从句的类型：
1.主语从句：在复合句中作主句的主语。连接词有that,whether;who,what,which;when,where,
how,why等。如:
●__________heisafamoussingerisknowntous.
●__________hewillgotoAmericaisnotyetfixed.
●__________she’scomingornotdoesn’tmattertoomuch.
●__________broketheglassyesterdayisnotclear.
注意：
1.为避免主语冗长,句子头重脚轻,经常用it作形式主语,主语从句放在后面作真正的主语。
记住以下it作形式主语的句型：
e.以it作形式主语，把主语从句后置的常见句型有：
1.Itis+名词+从句
It'sapity/shamethat…很可惜/很遗憾……
It'snosurprise/wonderthat…毫不奇怪/很正常……
2.Itis+形容词+从句
It'scertain/uncertain/obviousthat……肯定…/不确定/显然……
It'slikely/possible/probablethat…有可能……
3.Itis+过去分词+从句
suggest的名词It'ssaid/reported/thought/believethat…据说/据报道/大家认为/人们相信……
4.It+不及物动词+that不及物动词有seem/happen/appear/occur/doesn’tmatter/makesnodifference
5.Ithappensthat…碰巧……
●Itworriedherabit______herhairwasturninggrey.
●Itremainsaquestion______wecangetsomuchmoneyinsuchashorttime.
●Itisknowntous______wherethereispollution,thereisharm.
2.单个的主语从句作主语时，谓语动词用句单数形式；如果是两个或两个以上的主语作
主语，谓语动词用复数。
Whenandwherehewasbornhasn’tbeenfound. Whenhewasbornandwherehewasbornhaven’tbeenfound.
Exercises:
●.______makesthisshopdifferentisthatitoffersmorepersonalservices.
●______Icanpaybackthehelpthatpeoplegivememakesmeveryhappy.
●It’snotclear______wasresponsiblefortheaccident.
●______intheregulationsthatyoushouldnottellotherpeoplethepasswordofyoure-mail account.
A.Whatisrequired
B.Whatrequires
C.Itisrequired
D.Itrequires
2.表语从句：在复合句中作主句的表语。引导词有连词that,whether,asif,asthough;who,what,which,whose;when,where,how,why,because等。如:
●Theproblemis_________wedidn’tgetintouchwithhim.
●Thisis_________Henrysolvedtheproblem.
●Hissuggestionis_________we(should)finishtheworkatonce.
●Itlooked_________itwasgoingtorain.
●Thereason_________wedidn'ttrusthimis_________hehasoftenlied．
注意：
1.如果句子的主语是suggestion,advice,order,demand,proposal等名词时,后面引导的表语从句用should+动词原形,should可省略。
他的建议是我们应该马上完成工作.Hissuggestionisthatwe(should)finishtheworkatonce.
2.Thereasonisthat……的理由是，…的原因是…
Thereason__________hewaslateagainwas__________hewascaughtinthetrafficjam.
3.Itisbecause…这是因为…
Exercises:
●Thisis______shewasborn.
●Thequestionis______wecan’tgotheretoday.
●Myadviceisthathe______(go)toschoolbybike.
●______shecouldn’tunderstandwas______fewerandfewerstudentsshowedinterestinherlessons.
●Energyis______makesthingswork.
3.宾语从句：在复合句中作主句的宾语。引导词有连词that,whether,if;who,whom,whose,what,which;when,where,how,why等。如:
(1)V+宾语从句，即“动宾”：
Webelievethatheishonest./Iaskediftheyhadacheapsuit./Canyoutellmewhichdictionaryishers?/Ireally don’tknowwhatheisdoing.
●Ijustdon’tunderstand______thatpreventssomanyAmericansfrombeingashappyasone mightexpect.
A.whyitdoes
B.whatitdoes
C.whatitis
D.whyitis
●---Don’tyoubelieveme?
---______,Iwillbelieve______yousay.
A.No;whatever
B.Yes;nomatterwhat
C.No;nomatterwhat
D.Yes;whatever
●“Whatdidyourparentsthinkaboutyourdecision?”“Theyalwaysletmedo______Ithink Ishould.”
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