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1、Unit3I’mmoreoutgoing thanmysister.SectionA知识点总结1.both的用法（1）both…and…两者都……BothJimandJackaremiddleschoolstudents.(2)bothof……BothofthemarefromAmerica.(3)both放在句中，be动词之后，行为动词之前TheyarebothfromAmerica.TheybothcomefromAmerica.2.形容词的用法shortshorthairheavy/fatsmartstrongoutgoingserious严肃的，稳重的友好的,外向的聪明的，
2、漂亮的foolish有趣的,好玩的文静的,内向的funnytalllonghairthinquietweakfoolish有趣的,好玩的文静的,内向的funnytalllonghairthinquietSpeakouttheopposites(反义词)oftheseadjectives1.Jordanistall.2.YaoMingistallerthanhim.更高A+be+比较级+than+BOis_____thanIfatterThisexampleismoreinterestingthanthatone.O比I胖些TinaTaraWhichrunsfaster,thedog
3、orthesheep?Thedogrunsfasterthanthesheep.Thesheeprunsfast.Sam_____thedrums__________Tom.Tina_________loudly_____Tara.SamTomplaysbetterthansingsmorethanA+动词+副词比较级+than+B大多数形容词和副词有三个等级：原级、比较级、最高级。一、构成1.构成的不规则变化:eg.good/well–better–bestbad/badly–worse–worstmany/much–more–mostlittle–less–leastfar–f
4、arther/further–farthest/furthestGrammar:形容词和副词的比较级和最高级2.构成的规则变化:1)单音节词和少数双音节词一般在词尾后加-er或-est.如：cold–colder–coldestnice—nicer–nicest2)重读闭音节词末尾只有一个辅音字母时,先双写这个辅音字母,再加-er或-est。如:big–bigger–biggestthin–thinner–thinnest3)以“辅音字母+y”结尾的双音节词，先改y为i,再加-er或-est。如：easy–easier–easiesthappy–happier–happiest注：
5、由形容词+ly构成的副词，变比较级时要+moreclear-clearly-moreclearlyloud-loudly-moreloudly4)多音节词和部分双音节词在词前加more或most。如：delicious–moredelicious–mostdeliciousinteresting–moreinteresting–mostinteresting二、用法1.比较级表示两者(人或事物)的比较。eg.IamtallerthanTom.Mydressismorebeautifulthanhers.2.最高级表示三者或三者以上(人或事物)的比较,其中有一个在某一方面超过其他几个
6、时,用最高级。最高级的前面一般要加定冠词the,后面可带of(in)短语来说明比较的范围。如：Sheistheyoungestintheclass.Jasonisthetallestofthethree.Whosehandwritingisthebestofall?3.在形容词比较级前还可用much,even,still,alittle来修饰,表示“……的多”,“甚至……”,“更……”,“……一些”。如：Thiscityismuchmorebeautifulthanbefore.She’salittlemoreoutgoingthanme.It’salittlecoldertoda
7、y.4.“比较级＋and＋比较级”意为“越来越……”。多音节比较级用“moreandmore＋形容词原级”形式。如：It’sgettingworseandworse.Thegroupbecamemoreandmorepopular.1.Thisbookismuchmoreinterestingthanthatone.2.Hiswordismuchbetterthanmine.3.PhysicsisalittleharderthanChemistry.4.Today’w
