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1、Unit2ThePredictiveClausewelcomeRevision：定語從句的功用：相當(dāng)于一個(gè)形容詞，修飾一個(gè)名詞或代詞（即先行詞）。常緊跟在先行詞后，作定語用。如：Idon’tlikethemanwhowearsabeard.賓語從句的功用：相當(dāng)于一個(gè)名詞，作及物動(dòng)詞、形容詞或介詞后的賓語表語從句的功用：如：Idon’tknowwhereIcangotsomuchmoney.Itdependsonwhetherwehaveenoughmoney.Iamsurethathewillcomet
2、hisafternoon.相當(dāng)于一個(gè)名詞，作連系動(dòng)詞如:be,look,taste,seem等后的表語。一、表語從句的定義：表語從句在復(fù)合句中作主句的表語。表語從句和主語指同一內(nèi)容，它對(duì)主語進(jìn)行解釋、說明，使主語的內(nèi)容具體化。二、表語從句的表現(xiàn)形式1.由從屬連詞引導(dǎo)。如：“that”,“whether”Thequestioniswhetherweshouldaskthemforhelp.Thetroubleisthathehasneverdonetheworkbefore.2.由連接代詞引導(dǎo)。如：“wh
3、at”“who”“whom”“whose”“which”Guilinisnotwhatitusedtobe.Whatshewantstoknowiswhichdresssheshouldbuy.3.由連接副詞引導(dǎo)。如：“when”“why”“where”“how”“because”ThatiswhereLuXunusedtolive.Thatiswhyhedidn’tpasstheexam.4.另可由asif,asthough引導(dǎo)。如：Itlooksasifitweregoingtorain.表語從句兩
4、大要素:除that外的所有引導(dǎo)詞都有自己的意義。除that,whether外的所有引導(dǎo)詞都須在從句中充當(dāng)相應(yīng)的成分。一些引導(dǎo)詞的用法（一）that在表語從句中,又。Thefactisthathehasn’tyetrecoverfromillness.Thereasonwhyhehastogoisthathismotherisillinbed.既不充當(dāng)成分沒有意義比較在定語從句中的用法。TherearesomefilmsthatI’dliketosee.Sheistheonlyoneamongusthat
5、knowsFrench.結(jié)論:that在引導(dǎo)定語從句時(shí),指事物,也可指人,在從句中作主語或賓語,作賓語時(shí)?？墒÷浴Ｒ恍┮龑?dǎo)詞的用法（二）What在表語從句中充當(dāng)表示.1.Thequestioniswhatcausedtheaccident.2.Thatmountainisnolongerwhatitusedtobe.3.Whathetoldyouwaswhathadbeendiscussedatthemeeting.主語、賓語或表語什么，什么樣子，或所……的（人或事）另：what不引導(dǎo)定語從句一些引導(dǎo)詞
6、的用法（三）Which在引導(dǎo)表語從句時(shí),常充當(dāng)_____________表示。如：Ireadaboutitinsomebookoranother,butwhatIdon’tknowiswhich(book)itis.比較在定語從句中的用法。Chinaisacountrywhichhasahistoryof2000years.Adictionaryisabookwhichgivesthemeaningofwords.定語,表語其中哪一個(gè)結(jié)論:which在引導(dǎo)定語從句時(shí),指事物,在從句中作主語或賓語,作賓語
7、時(shí)?？墒÷砸恍┮龑?dǎo)詞的用法（五）whether在表語從句中表,但不充當(dāng)句子的成分。if引導(dǎo)表語從句.如:Whatthedoctorreallydoubtsiswhethermymotherwillrecoverfromtheseriousdiseasesoon“是否”不能LiLeiisnowinanewjacket.HelooksasifhewereanAmericanboy.Thegirlisgivingusavividdescriptionofthemoon.Itseemsasifshehadbee
8、ntothemoonmanytimes.Itlooksasifitmightrain.Thecloudsaregathering.itlooksasifitisgoingtorain.一些引導(dǎo)詞的用法（六）由asif,asthough引導(dǎo)表語從句時(shí)要注意語態(tài).若從句表示與現(xiàn)在事實(shí)相反,謂動(dòng)用,與過去事實(shí)相反用或表示將來的可能性不大，則用.一般過去式（be用were）had+p.p.Would(might,could)+v原Thankyou!
