2020春新教材高中英语 Unit 4 SPACE EXPLORATION Section Ⅳ Di

1SectionⅣDiscoveringUsefulStructures——不定式(短语)作目的状语2一、不定式(短语)作目的状语不定式(短语)作目的状语，主要用来修饰动词，表示某一动作或状态的目的。1.todo...为了……这种形式可置于句首(起强调作用，有逗号与句子隔开)或句尾(通常不用逗号隔开)。在句首时常译为“为了……”；在句尾时常译作“以便……，目的是……”。3Tocatchtheearlybus，Igotupearlythismorning.为了赶上早班车，我今天早上很早就起床了。Weworkhardtobeadmittedtoakeyuniversity.我们努力学习，目的是考上重点大学。[名师提醒]不定式(短语)表示的是主语的目的，因此其逻辑主语通常是句子的主语。[译]为了画好地图，你需要一支特殊的钢笔。[误]Todrawmapsproperly，aspecialpenisneeded.[正]Todrawmapsproperly，youneedaspecialpen.42.inordertodo...为了……这种形式更能突出目的性，既可以置于句首又可以置于句尾。Inordertoloseweight，hetakesexerciselikecrazy.＝Hetakesexerciselikecrazyinordertoloseweight.为了减肥，他拼命锻炼。53.soastodo...为了……这种形式与inordertodo...一样突出目的性，但soastodo...不能置于句首。Heclosedthewindowsoastokeepwarm.为了保暖他关上了窗户。[名师提醒]不定式的否定式均是在to前加not。Wehadbetterhurryupinorder/soasnottobelateforclass.为了不上课迟到，我们最好快点。64.不定式的复合结构作目的状语当不定式(短语)有自己的执行者时，需用不定式的复合结构forsbtodo作状语。Heopenedthedoorforthechildrentocomein.他打开门以便孩子们进来。75.目的状语从句与不定式的转换不定式(短语)作目的状语可以与目的状语从句相互转换。(1)当目的状语从句中的主语与主句中的主语相同时，可以直接简化为不定式或不定式短语作状语。例如：Wedressedupinorderthat/sothatwecouldstartearly.＝Wedressedupinorderto/soastostartearly.我们穿戴整齐以便早点动身。8(2)当目的状语从句中的主语与主句中的主语不相同时，要用动词不定式的复合结构作状语。Icameearlyinorderthatyoumightreadmyreportbeforethemeeting.＝Icameearlyforyoutoreadmyreportbeforethemeeting.我早点来是为了你在会前可以看我的报告。9[巩固内化1](1)选出不定式作目的状语的句子①Wemustdoeverythingwecantohelpthem.②Heleft，nevertoreturn.③Todoagoodjob，wemusthavetherighttools.④Wejumpedwithjoytohearthenews.⑤Shewastooyoungtounderstandallthat.⑥Shestudiedveryhardtogethighgrades.⑦Manyfarmersfertilizetheircropsinordertomakethemgrowmorequickly.⑧Weplanttreeseveryyearsoastoprotectthesoilonthehill.________________________________________________________________________①，③，⑥，⑦，⑧10(2)一句多译我们将召开会议来讨论这种不健康的生活方式。①We’llholdameeting_____________________theunhealthylifestyle.②We’llholdameeting_____________________theunhealthylifestyle.③We’llholdameeting_____________________theunhealthylifestyle.④________________________theunhealthylifestyle，we’llholdameeting.⑤________________theunhealthylifestyle，we’llholdameeting.todiscussinordertodiscusssoastodiscussInordertodiscussTodiscuss11[巩固内化2]同义句转换①WestayedinBeijingsothat/inorderthatwecouldvisittheBird’sNest.→WestayedinBeijing_____________________________theBird’sNest.②Wewilldoeverythinginorderthat/sothattheycanlivehappily.→Wewilldoeverything_________________________.③We’llholdameetingforyoutoknowtheprogramme.→We’llholdameeting____________________youcanknowtheprogramme.soasto/inordertovisitforthemtolivehappilyinorderthat12本节内容结束