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1、it的用法及強調(diào)句型it的用法一、it作指示代詞【完成句子】用one,ones,it,that,those填空(1)—Ican'tfindmywatch.—Youhaven'tfound______?Ifyouwanttobuyanew______,Isuggestyoubuy______madeinChina.(2)We'vegotabigcupandtwosmall______.(3)Theweightofanelephantismuchgreaterthan______ofatiger.ito
2、neoneonesthatit指代上文提過的事物/事件時,是同名同物,相當于the+名詞;one指代上文提過的單數(shù)可數(shù)名詞是同名異物,相當于a+名詞;a/an+形容詞+one等于a/an+形容詞+名詞;復(fù)數(shù)形式用onesthat后面常有后置定語,有特指意義,代替不可數(shù)名詞或單數(shù)可數(shù)名詞,相當于the+名詞(4)Thebooksonthefirstshelfareeasierthan______onthesecondshelf.(5)Theboytoldhisstoryand______ofthegi
3、rlupstairs.those/theonesthat/theone復(fù)數(shù)名詞用those,相當于theones?!纠溆^察】—Someoneisknockingatthedoor.Whoisit?—ItmustbeLeo.Hesaidhe'dcometoseeme.it指代人時,常指小孩或身份不明的人?!纠溆^察】It'stooquietintheroom.Everyonejustkeepssilent.it可用以指代環(huán)境或情況?!就瓿衫洹扛鶕?jù)語境補全句子(6)—Whattimeisitnow?
4、—halfpastseven.(7)—springnowandit'swarmthesedays.It'sItisit可用以指代時間、季節(jié)、天氣或距離。【注意】it指代時間時,有如下一些句型:(1)Itistimeforsth./(forsb.)todosth./that-從句(shoulddo/did,必須用虛擬語氣)(2)Itis/hasbeen+sometime+since-從句(從句用一般過去時)(3)It/Thisisthefirst/second…timethat-從句(必須使用現(xiàn)在完成
5、時)這是某人第……次做了某事。It/Thatwasthefirst/second…timethat-從句(必須使用過去完成時)例:①ItisthesecondtimethatshehasvisitedtheGreatWall.②ThiswasthefirsttimethatIhadcomelatetoschool.(4)Itwas+時間點+when-從句.例:Itwaseveningwhenwegothome.例:①過了5年他們才從北大畢業(yè)。Itwasfiveyearsbeforetheyfinal
6、lygraduatedfromBeijingUniversity.②不久,我們就要從我們學校畢業(yè)了。Itwon'tbelongbeforewegraduatefromourschool.(5)Itwas/willbe+sometime+before-從句過了/要過多久才……過不了多久就……二、it作形式主語【完成例句】(8)ispossibleformetomakeatouraroundtheworld.【結(jié)論】代替由不定式、動名詞或從句所表示的真正主語。為平衡句子,通常把不定式作主語改為it作形式
7、主語。It三、it作形式賓語【例句觀察】①Howdiditcomeaboutthatsomanypeoplewereattacked?②Shefeelsithardtogetintouchwithheroldfriend.③Mobilephonesmakeitpossibleforustokeepintouchanywhere.④Ihavemadeitaruletogetupearly.it可以用在某些固定句型中,例如:Howdiditcomeaboutthat-從句意為“……怎么發(fā)生的?”it作形
8、式賓語代替由不定式、動名詞或從句所表示的真正賓語。常見結(jié)構(gòu)有:主語+think/consider/find/feel/make/believe/regard+it+adj./n.(forsb.)todo.【例句觀察】Ihateitwhenpeoplespeakwiththeirmouthsfull.【結(jié)論3】主語+hate/dislike/love/like/enjoy/prefer/appreciate+it+when-從句,表示對某一情況的喜好或厭惡?!纠溆^察】