高中英语 unit 4 astronomy the science of the stars language points导学案（教师版）新人教版必修3

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1、陕西省西安交大阳光中学高中英语Unit4AstronomythescienceofthestarsLanguagepoints导学案（教师版）新人教版必修3第课时课题名称时间第周星期课型Languagepoints主备课人目标Knowledgeaims:LearnusefulwordsandexpressionsAbilityaims:Usetheusefulwordsandexpressionscorrectly.重点Mastertheusageofthekeywordsandexpressions.二次

2、备课难点Masterthesentencepatterns:Thisproducedachainreaction,whichmadeitpossibleforlifetodevelop自主学习在课文中找出下列句子1.没有人确切地知道地球是怎样开始的，因为它发生在很久以前。2.地球变得如此动荡激烈以至于不知道这个固体形状是否会继续存在下去。3.更重要的是当地球冷却下来，水就出现在其表面。4.这就产生了一个连锁反应，是生命的发展成为可能。问题生成记录：精讲互动1.Becausetheatmospherecanh

3、oldsomeheatfromthesun,otherwisetheearthwouldbetoocoldtoliveonatnight.atmosphere词性：_____________词义：_____________Thereisalwaysafriendlyatmosphereinmyfamilywhenwegettogether.atmosphere词性：_____________词义：_____________2.WaterhadalsoappearedonotherplanetslikeMar

4、s,butunliketheearth,ithaddisappearedlater.【归纳】unlike词性：_____________词义：_____________Theyarebothteachers.Apartfromthis,theyarequiteunlike.【归纳】unlike词性：_____________词义：_____________3.Itisharmfultoyoureyestoreadinthesun.【归纳】beharmfulto=doharmto【拓展】Imeannoharm

5、.翻译:Wewillnotdoanythingthatharmthecauseofpeace.翻译：1.Don’tbesilly,suchathingdoesnotexist.【归纳】exist词性：_____________词义：___________________【用法】Fishcannotexistwithoutwater.【拓展】existencen.词义：_______________comeintoexistence,产生，开始存在inexistence,现存的5.Howtheearthcam

6、eintobeingisstillapuzzletous.puzzle词性：_____________词义：__________________Whatpuzzlesmemostiswhysomestudentsaresosilentinclass.puzzle词性：_____________词义：__________________【拓展】puzzling词义：__________________puzzled词义：__________________6.intime【用法】Thepolicecamein

7、time,sotheaccidentwasstopped.【用法】Youwillsucceedintimeifyoukeeponworkinghard.【归纳】intime词义_____________7.Becausetheygavebirthtoyoungbabyanimalsandproducedmilktofeedthem.【归纳】givebirthto词义_____________【用法】Thisaccidentgavebirthtothebeginningofthewar.【归纳】givebir

8、thto词义_____________8.inone’sturn词义_____________Thustheyhave,intheirturn,becomethemostimportantanimalsontheplanet.inturn,词义_____________taketurnstodosth词义_____________byturns词义_____________It’sone’sturntodosth