2025届高三英语一轮复习主语从句课件.pptxVIP

主语从句unit4

目录/Contents0102030405定义引导词形式主语特殊情况课后练习

定义

主语一个句子说明的人或事物,即叙述的主题，一般位于_____________。句首IlikeEnglish.Thebusleft.

Jimisgoodatplayingthepiano.Toseeistobelieve.Smokingisbadforhealth.Whathehassaidistrue.

主语从句一个从句代替主语在主句中做主语句子中的主语位置被一个从句所占用

Whenwewillsetupthefactoryhasn’tbeendecided.Whetherhewillcomemakesnodifference.Thattheperformancewillbeheldmakeseveryoneexcited.

thatwhetherwho;whose;which;what;whatever;whichever;whoeverwhen;why;where;how连接副词连接代词连接词

that无实义；只连接作用whether有实义；也起连接作用if为什么不引导主语从句？

who;whover主语、宾语；表语what;whatever主语；宾语；表语which；whichever;连接代词

when什么时候where什么地方why为什么连接副词how如何

练习

__________heismychildremainsaquestion.Whether

________Ilikemostisyourhairstyle.What

________theletterwasfromisstillunknown.Who

Everyyear,____________makesthemostbeautifulkitewillwinaprizeintheKiteFestival.whoever

________dinosaurssuddenlydisappearedstillremainsamystery.Why

_______hedidn’tturnupatthemeetingdisappointedmealot.That

_______hebecameagreatscientistisknowntousall.How

it形式主语

it形式主语避免头重脚轻

ispossiblethatshewillcomebacktomorrowIt.

itis+形+that...01形式主语02itis+名+that...03itis+过去分词.+that...04it不及物动词+that...

necessary;certain;right;clear;possible;(un)likelystange;obvious;important;.......itbe+形+that...

apity;ashame;awonder;anhonor;afact;nowonder;nosurprise.....itbe+名+that...

said;told;reported;considered;thought;anounced;hoped;well-knownsuggested;advised;ordereditbe+过去分词+that...

happen；occur；appearturnout;it+不及物动词+that...

Itdoesntmatterwhetheryouturnrightorleftatthecrossing---bothroadsleadtothepark.Itdoesn’tmatter/makesnodifference(没有影响/毫无区别)+引导词

注意事项0102030405that不做成分；无实际意义if不用于主语从句中形式主语虚拟语气用法课后练习