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时间:2020-03-02
《It is +adj. +动词不定式的用法.doc》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、Itis+adj.+动词不定式的用法------------------------------------------I.Itis+adj.+todosomething结构 句中it是形式主语,真正主语是动词不定式todosomething。因此也可以表达为todosomething+is+adj.。 e.g.Itisamazingtodrivepastfieldswhichseemtogoonforeverorwholehillscoveredwithneatrowsofgrapevines。 本句形
2、式主语为it。真正主语todrive…grapevines移到了句子后部,使句子变得平稳,不致主语太长。如果把真正主语放在前面,那么整个句子就显得头重脚轻。因此,就用it作为先行主语。 这种结构还有两种动词不定复合结构。 1.Itis+adj.+forsomebodytodosomething e.g.Itwasverydifficultforthemtoflybecausemenhavenotgotwings. 此句真正的主语是动词不定复合结构forthemtofly。其中them是tofly的逻辑主
3、语。 2.Itis+adj.+ofsomebodytodosomething e.g.Itissensible_____youtobringanumbrellainsuchweather. A.inB.for C.withD.of 答案为D。这里sensible跟逻辑主语you的关系是表达人的特点、性格、本质等。像此类形容词还有kind,foolish,clever,wise,friendly等。II.Itis+名词+todosomething结构 e.g.Itisgreatfuntoseethep
4、andaswalkinginthezoo.III.另外,it作先行主语时还有其他用法 1.it+及物动词+宾语+不定式 e.g.Itcostme100dollarstorepairthecar. Ittakesmetwohourstofinishmyhomeworkeveryday. Itgavemegreatpleasuretowatchthem. 2.it+be+名词/形容词+doing e.g.Itisnousestudyingforanexamatthelastminute. Itisaw
5、asteoftimetalkingtohim. Itispleasantsittinghere.Exercise I.Choice 1.Todayitiseasy_______on-lineandmillionsofpeopleusetheInterneteveryday. A.getB.toget C.getsD.got 2.Itisclever_______youtoanswersuchaquestion. A.forB.on C.withD.of 3.______funitistoride
6、onacamelinthedesert! A.WhatB.Whata C.HowD.Howa 4.Ittakes3daysfortheparcel_______AmericabyairmailfromShanghai. A.reachB.reached C.toreachD.reaches 5.______importantthingitistodoeyeexerciseseveryday! A.WhatB.Whata C.WhatanD.How 6.Itisnouse_______about
7、theschoollunch. A.complain B.complaining C.tocomplain D.complainedII.用it作形式主语改写句子 1.TospeakEnglishmoreisveryimportantforyou. 2.Todomoreexercisesisveryhelpful. 3.Todoismoreimportantthantosay. 4.Tohelpothersisourduty. 5.TogototheSouthPoleistheboy'swis
8、h. 6.Todrinkplentyofwaterisgood.Key:I.1.B2.D3.A4.C5.C6.B
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