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it作形式主語PPT講座.ppt
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為避免主語冗長,句子頭重腳輕,經常用it作形式主語,主語從句放在后面作真正的主語。1.eed.2.Itisnotknownwhetherhewillgothere.3.Ithasnotbeendecidedyetwhenthey’llstarttheproject.“It”isusedasemptysubject.形式主語1.Itis+名詞+從句Itisafactthat…事實是…Itisanhonorthat…monknowledgethat…是常識能獲邀參加你們的婚禮真是不勝榮幸風就是流動的空氣,這是常識可惜他由于一個拼寫錯誤沒有得滿分It’sagreathonorthatIhavebeeninvitedtoyourwedding.It’scommonknowledgethatwindismoving/flowingair.It’sapitythathedidn’tgetfullmarksbecauseofaspellingmistake.句型1.2.Itis+adj.+從句 It’scertainthat…肯定… Itispossiblethat...很可能…… Itisunlikelythat...不可能……Itisobviousthat…很明顯…Itisnecessary\important\natural\...that…*_________________(很可能)ebacktomorrow.*_________________(很明顯)thismeasureiseffective.+(should)+do…ItispossiblethatItisobviousthat句型2.另注意在主語從句中用來表示驚奇、不相信、惋惜、理應如此等語氣時,謂語動詞要用虛擬語氣“(should)+do”,常用的句型有:Itisnecessary(important,natural,strange,etc.)that…Itissuggested(requested,proposed,desired,etc.)that…3.Ithappens(seems,looks,appears)that...該句型中it是形式主語,that引導的是主語從句,主句中的happen,seem等詞是不及物動詞.Ithappened(sohappened)thathemethisteacherinthestreet.碰巧 Itseemsthathewillbebackinafewdays.句型3.It seems that sb. do/ be doing/ have done/ had done= Sb. seems to do/ be doing/ have done/to be done/to have beenIt seemed that he had been to Beijing before.=He seemed to have been to Beijing before.It+不及物動詞+從句Ithappenedthat...碰巧……urredtomethat…我突然想起…*________________(剛好)Icameintotheofficeatthattime.*____________________(我突然想起)ettosenttheletter.urredtomethat句型4.據說他讀過這篇小說.It was said that he had read this novel.=He was said to have read this novel.It+be+-ed分詞+that-從句Itissaidthat……據說……Itisknownthat……據了解……Itisreportedthat……據報道……Itisbelievedthat……據認為……據說她兩年前在美國留學It’ssaidthathestudiedinAmericatwoyearsago2.據說她現在正在美國留學It’ssaidthatheisnowstudyinginAmerica3.據說她現在懂三國外語It’ssaidthatheknowsthreeforeignlanguagesHeissaidtohavestudiedinAmericatwoyearsago.HeissaidtobestudyinginAmericanow.Heissaidtoknowthreeforeignlanguages.Itissuggested(ordered,required...)that...該句型和上一個同屬一個句型。主句中的過去分詞是表示請求,建議,命令等詞時,that后的從句要用虛擬語氣(should+動詞原形),should可以省。常譯為“據建議;有命令… 內容來自淘豆網www.eawpme.live轉載請標明出處.
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