英语人教版八年级下册Unit 7 Section A Period 3.ppt

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1、Period34a-4cGrammarfocusUnit7What’sthehighestmountainintheworld?SectionAObjectivesTolearntousecomparativesandsuperlativeswithadjectivesandadverbsTolearnnewwords:thePacificOcean…oceanthePacificOceann.大海；海洋n.太平洋WordsreviewReviewCanyoutranslatethefollowingsentences?长江大约长6,300千

2、米。TheYangtzeRiverisabout6,300kilometerslong.ReviewCanyoutranslatethefollowingsentences?黄河长5,464千米。TheYellowRiveris5,464kilometerslong.ReviewCanyoutranslatethefollowingsentences?明朝的长城大约有8,850千米长。TheGreatWallinMingdynastyisabout8,850kilometerslong.ReviewCanyoutranslatethefoll

3、owingsentences?珠穆朗玛峰高8,844.43米，所以攀登起来很危险。Qomolangmais8,844.43metershighandsoisverydangeroustoclimb.TheYangtzeRiverisabout6300kilometerslong.TheYellowRiveris5464kilometerslong.TheGreatWallinMingdynastyisabout8,850kilometerslong.Qomolangmais8,844.43metershighandsoisverydanger

4、oustoclimb.Whatcanyougetfromtheabovefoursentences?Nowlet’strytotranslatethesentencesbelow:那个篮球运动员有两米高。那条河只有两米深/宽。这棵树有两米高。那条河长两千米。Thebasketballplayeristwometerstall.Theriverisonlytwometersdeep/wide.Thetreeistwometerstall.Theriverisabouttwokilometerslong.5.这座山大约有两千米高。6.这个箱子大约

5、有两米高/宽/长。Themountainisabouttwothousandmetershigh.Theboxisabouttwometershigh/wide/long.GrammarFocusGrammarfocus—What’sthehighestmountainintheworld?—Qomolangma.—HowhighisQomolangma?—It’s8,844.43metershigh.It’shigherthananyothermountain.—Whichisthedeepestsaltlakeintheworld?—Th

6、eCaspianSeaisthedeepestofallthesaltlakes.—DidyouknowthatChinaisoneoftheoldestcountriesintheworld?—Yes,Idid.It’smucholderthantheUS.大多数形容词有三个级。1.原级:Structure:as...as...像..….一样e.g.TimisastallasTom.2.比较级(用于两者之间的比较):Structure：形容词比较级＋than...e.g.Thisboxisbiggerthanthatone.形容词和副词的比

7、较级和最高级3.最高级(用于三者或三者以上的比较):Structure:the+形容词的最高级＋of/in...e.g.Tomistheheaviestinourclass.Heisthemostpopularinourschool.规则变化1)一般情况下，单音节或双音节的形容词/副词比较级＋er，最高级＋est。如:clever—cleverer—cleverestfew—fewer—fewestsmall—smaller—smallest等。形容词、副词的比较级和最高级规则变化和不规则变化2)以e结尾的词，比较级＋r，最高级＋st即可。

8、如：nice—nicer—nicestcute—cuter—cutestlarge—larger—largest3)以辅音字母＋y结尾的变y为i＋er或est如:e