主语从句讲解PPT课件

1 SubjectClauses主语从句 2 Grammar Whatpartdoestheunderlinedpartserveasineachsentence Atreehasfallenacrosstheroad Youareastudent Tofindyourwaycanbeaproblem Smokingisbadforyou 3 Howdoyoudo isagreeting Whatshesaidisnotyetknown Thatweshallbelateiscertain Whetherhewillgothereisnotknown Howwecanhelpthetwinswillbediscussedatthemeeting 4 定义 用作主语的从句叫主语从句 它是名词性从句之一 引导主语从句的连接词有 从属连词 that whether 连接代词 who whoever whom whose what whatever 和which whichever 连接副词 when where how和why 5 1 连接词 1 从属连词 that whether引导主语从句只起引导作用 在主语从句中不充当任何成分 that本身无实际意义 但不能省略 whether意为 是否 放在句首句末皆可 Thatpricewillgoupiscertain Thathewillcomeiscertain Whetherwegobytrainorbyboatmakesnodifference Whetherhe llcomehereisn tclear 6 2 连接代词who whoever what whatever which whichever whom whose Whichsidewillwinisnotclear Whowillwritethepoemhasnotbeendecidedyet Whateverhedidisright Whokilledthescientistremainsaquestion Whomsheborrowedmoneyfromstillpuzzledhim 7 3 连接副词when where how why等 Howthishappenedisnotcleartoanyone Whenhewillbebackdependsontheweather Whenwe llstarttomorrowwillbetoldsoon Wherethetestwillbegivenisnotyetdecided 8 Makesentences It scertainthatwewillbelate Thatwe llbelateiscertain Wedon tknowwhetherheiscomingornot Whetherheiscomingisnotknown Wedon tknowwhathewantstotellus Whathewantstotellusisnotknown Whenyouwillcomebackdoesn tmatter Itdoesn tmatterwhenyouwillcomeback 9 主语从句后置 为了避免主语冗长 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 Thatweshallbelateiscertain It scertainthatweshallbelate 1 Thattheearthisroundisknowntoall 2 Thatyoumissedthechanceisapity Itisapitythatyoumissedthechance It sknowntoallthattheearthisround 10 A It be 形容词 that从句 obvious true surprising good wonderful funny possible likely certain probable etc 如 Itiscertainthatshewilldowellinherexam B It be 名词词组 that从句 anhonour afact apity etc 如 It sapitythatwecan tgo 2 用it作形式主语的结构 11 C It be 过去分词 that从句 said reported thought expected decided announced etc 如 ItissaidthatMr GreenhasarrivedinBeijing D It 不及物动词或短语 that从句 seem happen doesn tmatter turnout 如 IthappenedthatIwasoutthatday Itdoesn tmatterwhethershewillcomeornot 12 1 主语从句在句首时 必须由连接词引导 不能省略这些连接词 误 Theyshouldlikeeachotherisnatural 2 如果主语从句放在句首 不能用if引导 但是如果用it做形式主语 而把主语从句放在句末时 也可以用if引导 误 IfMaryreallyheardhimisreallydoubtful 注意 正 Thattheyshouldlikeeachotherisnatural Itisnaturalthattheyshouldlikeeachother 正 WhetherMaryreallyheardhimisreallydoubtful ItwasdoubtfulifMaryreallyheardhim 13 Whatyouleftareonlyseveraloldbooks Whatyousaidisofgreatimportance 3 主语从句中用陈述语序 后面的谓语动词用第三人称单数 4 what 引导主语从句时 谓语动词 常与其后的名词作表语一致 且根据句子的语境而定 eg 5 用于Itisimportant natural necessary impossiblethat 句型中 主语从句应使用虚拟语气 用 should 动词原形 的形式 should有时可以省略 6 在It be suggested advised ordered requested insisted required中 that从句的谓语也应该用 should 动词原形 的形式 should有时可以省略 14 1 Whereshallwespendtheholidayisn tdecided 2 Youhavemadeamistakeisafact 3 Thatiscertainthatwecanwin 4 Nomatterwholeavestheroomlastoughttoturnoffthelights 5 Ifthepolicemenwillcomeisnotcertain weshall Thatyouhave Itis Whoever whether 改错练习 15 6 Itissaythathewasafamouswriter 7 Itisseemedthatitisgoingtorainsoon 8 Thatisfactthatshewonthefirstplace 9 Wholeavestheroomlastoughttoturnoffthelights 10 Itisimportantthatastudentlearnsaforeignlanguage said seems Itisafact Whoever shouldlearn 16 hemadeanimportantspeechatthemeetingwastrue A ThatB WhyC WhatD How 2 we llgocampingtomorrowdependsontheweather AIfBWhetherCThatDWhere 3 isknowntousallthatAmericaisadevelopedcountry AWhichBAsCWhatDIt 17 4 It sknowntousall af