名词性从句的种类

名词性从句的种类主语从句宾语从句表语从句同位语从句主语从句注意点1).主语从句一律用陈述句语序,即主语在前,谓语在后.例:误:Whenwillhecomeisnotknown.正:Whenhewillcomeisnotknown.主语从句注意点2).连接词that在从句中无实际意义,但不能省略.例:误:Hewillnotcometothemeetingthiseveningistrue.正:Thathewillnotcometothemeetingthiseveningistrue.主语从句注意点3).whether可以引导主语从句,但if不能。例:误:Ifthemeetingwillbeheldisstillnotknow.正:Whetherthemeetingwillbeheldisstillnotknow.主语从句注意点4).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.例:Itiswellknown/reported/thought/saidthat…Itisclear/necessary/certain/true/doubtfulthat…Itdoesn’tmatterwhether…/Itseemsthat…Itisapity/ashame/anhonorthat…宾语从句注意点1).宾语从句一律用陈述句语序.2).引导宾语从句的连词that也无实际意义,多数情况下可以省略.宾语从句注意点3).whether和if都可以引导宾语从句，但:(1)当whether后紧跟ornot时,不用if.例:Idon’tknowwhetherIwillstayornot.(2)介词后面的宾语从句不能用if.例:IworryaboutwhetherIhurtherfeeling.表语从句注意点1).表语从句一律用陈述句语序.2).表语从句的引导词that无实际意义,但不能省略.3).表语从句只能用whether,而不能用if引导.表语从句注意点4).不要使用Thereason…isbecausethat…句型,应使用Thereason…isthat…或This/it/that/isbecause…等句型.例：误:Thereasonwhyhewaslateisbecausethattherewasalotoftrafficontheroad.表语从句注意点(1)Thereason…isthat…正:Thereasonwhyhewaslateisthattherewasalotoftrafficontheroad.(2)This/it/that/isbecause…或:Hewaslate.Thatwasbecausetherewasalotoftrafficontheroad.同位语从句注意点同位语从句和定语从句的三点区别：•从性质上区别•从词类上区别•从引导词及其在句子中的成分上区别同位语从句注意点1.从性质上区别：定语从句是从句对其先行词的修饰或限制,属于形容词性从句的范畴;同位语从句是从句对前面抽象名词的进一步的说明和解释,属于名词性从句的范畴。同位语从句注意点1.从性质上区别:1)Thenewsthathetoldmeyesterdaywastrue.2)Thenewsthatourteamhaswonthegamewastrue.同位语从句注意点2.从词类上区别：同位语从句的先行词只能是idea,fact,news,belief,suggestion等抽象名词。定语从句的先行词可以是名词、代词、主句的部分或是整个主句。同位语从句注意点2.从词类上区别:1）Wearenotlookingintothequestionwhetherheisworthtrusting.2）Ourteamhaswonthegame,whichmadeusveryhappy.同位语从句注意点3.从引导词及其在句子中的成分上区别:1)有些引导词如how,whether,what可以引导同位语从句,但不能引导定语从句。(if不能引导同位语从句)例：Ihavenoideawhetherhecouldsucceedingettingintothecollege.同位语从句注意点3.从引导词及其在句子中的成分上区别:2）that引导定语从句时,在从句中一般作主语或宾语(指物时还可以用which代替),并且作宾语时常常省略。that在同位语从句中仅起连接作用,不充当任何成分,并且不能省略,也不能用which来代替。同位语从句注意点例：1）Theorderthatweshouldsendafewpeopletohelptheothergroupswasreceivedyesterday.2）Theorderthatwereceivedyesterdaywasthatweshouldsendafewpeopletohelptheothergroups.嘿嘿，总算复习完了！