高一英语（下）必修三Unit 2 Language study.ppt

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1、课标人教实验版高一Module3Unit2LanguagestudyWordstudyVerbAdjectiveNounweakenstrengthenbeautifuldigestbalanceamazeweakweaknessstrongstrengthbeautifulbeautydigestivedigestionbalancedbalanceamazingamazementalternativewordsandexpressionsWordsandexpressionsfromthetexts

2、houldrunawayafterdoingsomethingwrongsomethingtomakeyouthinbyeatingitoughttogetawayslimmingfoodsalternativewordsandexpressionsWordsandexpressionsfromthetextwishtoknowaboutsomethinggetridofsomethingpartsofplantsthathelpfoodmovequicklythroughthebodycuriosit

3、ythrowawayfiberalternativewordsandexpressionsWordsandexpressionsfromthetextchangingfoodintosomethingthebodycanuseproperamountofdifferentkindsoffoodneededforgoodhealthdigestionbalanceddietGrammar1.oughtto／shouldshould和oughtto都为“应该”的意思，可用于各种人称。oughtto的语气稍重

4、一些。Yououghtto(should)followyourteacher’sadvice.表示主语的义务或责任：Youshouldtakecareofyoursister．你应当去照顾你妹妹。或指出—个正确、明智的动作：Theyshouldn'tallowparkinghere；thestreetistoonarrow．这儿不该允许停车；马路太窄了。should和oughtto后面跟动词不定式的完成式,其肯定句表示”过去应该做而未做”,其否定句则表示”过去不该做但做了”。Youshould/ough

5、ttohavemadethedecisionaweekago.Ishouldn'thavemadesuchafoolishmistake.注意2.must和havetomust的用法1）表示主观的义务和必要,主要用于肯定句和疑问句,意思为 “必须……，得……，要……”；由must引起的疑问句，肯定回答要用must或have to,否定回答要用needn’t或don’t have to,意思是“不必”；must的否定形式mustn’t表示禁止，意思是“不能，不许”。如：—MustI finish the 

6、task right now?我现在必须完成这个工作吗？—Yes, youmust. / Yes, you have to.是的。(—No,youneedn’t./No,youdon’thaveto.不，不必。)Youmustn’tcomeherewithoutpermission.未经允许，你不能来这儿。have to的用法1）must表示一种主观的需要，而have to表示一种客观的需要，意思是“不得不”。 如：Ihavetoattendanimportantmeetingthisafternoon

7、.今天下午我不得不参加一个重要的会议。Motherisout,soIhavetolookaftertheshop.妈妈不在家，因此我不得不照看商店。2）have to的否定形式是don’thaveto,相当于needn’t。如：Theydon’thavetobuyacomputeratpresent.他们目前没有必要买电脑。用下列图片造句。做适当的运动Youshoulddosomesports.慢慢地进食，并有助消化。Yououghttoeatslowlyandit’sgoodfordigestion.

8、Youshouldhelptosetthedinnertable.Youshouldkeepyourroomclean.Wemustlistentotheteachercarefully.Wemustn’teatinclass.Yououghttohandonthehomeworkontime.Youshouldn’tbelateforschool.Weshouldaskquestionactively.Weshouldn’tmakenoi