资源描述：
《必修三Unit4主语从句.doc》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、必修三Unit4主语从句(SubjectClause)Ø定义:在句子中担当主语的是一个从句，这个从句就叫做主语从句。Ø位置：1.通常放在主句谓语动词之前Thathewillsucceediscertain.Whowillbeourmonitorhasn'tbeendecidedyet.Whetherhewilljoinuswon'tmakedifference.Howthebookwillselldependsonitsauthor.Whatcausedtheaccidentremainsunknown.2.由形式主语it代替，而本身放在
2、句子末尾。Itdoesn’tmatterwhetherheiswrongornot.Ø辨别下列从句的类别(1-6)：主从；宾从；表从；主从；宾从；主从Ø主语从句的连接词引导主语从句的连接词可分为三类：连接词：that,whether/if；连接代词：what,whichwho,whom,whose,whatever,whoever,whichever等；连接副词：when,where,how,why,whenever,wherever等。lthat:1.无词义；2.在主语从句中不作成分；3.一般不能省略（尤其在句首时）Thathewill
3、comeandhelpusiscertain.Thatheisthebeststudentintheclassisobvious.lWhether/if:1.有词义：“是否”；2.在主语从句中不作成分；3.whether引导的主语从句可放句首、句末；4.If引导的主语从句不能位于句首。Whetherwewillsucceedisstillaquestion.Ifwewillsucceedisstillaquestion.(×)Itisnotknownwhether/ifhewillcome.:l连接代词：what,whatever,who
4、,whoever,whose,which,whichever等。连接副词：when,where，why,how等。1.有词义；2.在主语从句中作成分。Whatheishasnothingtodowithyou.Whoseticketthisishasnotbeenfoundout.Whenthetestwillbegivenisnotyetdecided.Whateveryoudidisright.Ø如何选择连接代词和连接副词在主语从句中，连接词的选择要看这个从句的句子结构，假如根据意思判断为缺少主语，宾语，表语等时应该考虑who,who
5、ever,which,whichever,what,whatever,whom,whomever；如果缺少定语则想到whose,which；如果缺少状语则应该选择how,where,when,why等。因此要想做好题目首先得了解句子成分。WhatIcan’tunderstandiswhyhehaschangedhismind.（缺少understand的宾语，意为“…的事”）Whoeverbreaksthelawwillbepunished.（缺少breaks的主语，意为“无论谁”）Ø主语从句后置！为了避免主语冗长，句子头重脚轻，主语从句
6、作主语时通常用it作形式主语，主语从句放在后面作真正的主语。Thathefinishedwritingthecompositioninsuchashorttimesurprisedus.=Itsurprisedusthathefinishedwritingthecompositioninsuchashorttime.Whetherhewillcomeornotdoesn’tmatter.=Itdoesn’tmatterwhetherhewillcomeornot.Whowilldothatjobisnotyetdecided.=Itisn
7、otyetdecidedwhowilldothatjob.Ø用it作形式主语的that从句有以下搭配关系：1.It+be+形容词+that从句Itisnecessary/important/obvious/certain/natural…that…2Itisnecessarythattheproblemshouldbediscussedatonce.2.It+be+名词+that从句Itisapity/ashame/nowonder/anhonour/nosurprise…that…It'sawonderthathedidn'tfail.
8、3.It+be+-ed分词+that从句Itisbelieved/reported/said/thought/expected/knownthat…Itissaidthathe‘sgotmar
