Unit 1 Discover useful structures 导学案- 高中英语人教版（2019）选择性必修第二册

第页科学是永无止境的，是一个永恒之谜。Unit1ScienceandscientistsDiscoverusefulstructures课型：新授课课时：2课时班级:______姓名:________小组:_______【学习目标】TeachingObjectives：1.Tomasterthetargetgrammarpredicativeclauses.;2.Tousethegrammarcorrectly.Ⅰ.了解感知Lead-in:观察下面句子，注意划横线部分：1.Thepersonstoodinfrontofyoujustnowisheadmaster.2.Thedoorremainedclosed.3.MyjobistoteachyouEnglish.4.Thereasonwhyhecamelatewasthathisclockdidn’twork.Ⅱ.深入学习1.Whatispredicative?表语用来说明___________________________________________________________________。表语常由___________________________________________________________________充当。表语从句的定义:Thequestionisdifficult.Thequestioniswhowilldoit.在复合句中做表语的从句，叫做______________________。它位于主句的系动词之后，对主语进行解释说明，使主语的内容具体化。可以接表语从句的系动词有：（1）状态系动词：_____________________________________________________________（2）感官系动词：_____________________________________________________________（3）持续系动词：_____________________________________________________________（4）变化系动词：_____________________________________________________________（5）终止系动词：_____________________________________________________________4.引导词从属连词：____________________________________________________(if不引导表语从句)连接代词：____________________________________________________连接副词：____________________________________________________(1)that在从句中仅起连接作用，无实际意义，在句中不作任何成分，不能省略。Myopinionis___________it’sgettingbetterandbetter.(2)whether在句子中不充当任何成分，但具有“是否”的意义。注意：if不能引导表语从句。Thequestionis___________itisworthdoing.Thequestionis___________wecanwinthem.(3)asif/though引导表语从句时，在句子中不充当任何成分，但有意义。译为：似乎，好像。Helooks___________hewerearichman.Itsounds___________someoneisknockingatthedoor.asif/asthough引导的表语从句如果是事实，用陈述语气，如果与事实不符，就用虚拟语气(主句一般现在时，从句就用一般过去时。主句是一般过去时，从句用过去完成时)。Theyoungmanwithlonghairlooks___________hewereagirl.Darkcloudsaregathering.Itlooks___________it’sgoingtorain.(4)what在表语从句中充当主语、宾语或表语，表示什么，什么样子，或…的（人或事）Thequestionis___________causedtheaccident.Thatmountainisnolonger___________itusedtobe.Whathetoldyouwas___________hadbeendiscussedatthemeeting.(5)who在表语从句中充当主语、宾语或表语,表示谁Theproblemis___________coulddothework.Mytroubleis___________Icanturnto.Couldyoutellme___________heis?(6)which在引导表语从句时，常充当定语，表语，表示哪一个，哪一些。Ireadaboutitinsomebookoranother,butwhatIdon’tknowis___________(book)itis.(7)where,when,why,how除在句中起连接作用外，在从句中还充当时间、地点、方式、原因状语，本身具有词义。Thisis___________shewaslateforthemeeting.这就是她会议迟到的原因。Thequestionis___________hedidit.问题是他如何做此事的。Thatis___________hewasborn.那就是他出生的地方。注意：主语一般不用reasonThat/Itis/waswhy……那是……的原因That/It/is/wasbecause……那是因为……Hewasill.That’sbecausehewassenttothehospital.

(强调原因）Hewasill.That’swhyhewassenttothehospital.

（强调结果）5.使用虚拟语气的表语从句Mysuggestionisthatwe(should)startearlytomorrow.在表示建议、劝告、命令含义的名词后的表语从句，谓语动词需用“should+动词原形”表示，should可省略。常见的词有：advice,suggestion,order,proposal等。

Ⅲ.迁移应用Ⅰ.单句语法填空1．Thereasonforyourmistakeis___________youlackconfidenceinyourself.2．That's___________weshoulddo.3．Thedoubtis___________hasgotawaywiththedocument.4．Helooked_______________hewereill.5．Thebestmomentforthefootballstarwas___________hescoredthewinninggoal.6．Tomleftimmediately.That's___________heonlyhad10minutestogettohisnextjob!7．Allthiswasovertwentyyearsago，butitis___________itwereonlyyesterday.8．Thequestionis___________wewillhaveoursportsmeetnextweek.9．Thatis___________wewerelatelasttime.10．Thatis___________LuXunoncelived.Ⅱ.完成句子(用表语从句补全句子)1．Hispromiseis_______________________________________andmakehisparentshappy.我相信通过努力我会成功的。2．Thefactwas_____________________________.事实是他没有真正的努力。3．Thequestionis___________________________________.问题是这部电影是否值得看。4．Now______________________shehadknownMillieforyears.现在看起来她认识米莉已有好多年了。5．Myadviceisthatyou_______________________________________asoftenaspossible.我的建议是你尽可能经常地练