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1、R·七年级上册Unit7Howmucharethesesocks?SectionAGrammarFocus-3cHowmuchisthehat?It’sfivedollars.HowmuchisthisT-shirt?It’ssevendollars.Howmuchisthatbrownsweater?It’seightdollars.Howmucharethesesocks?They’retwodollars.Howmucharethoseblacktrousers?They’reninedollars.Gr
2、ammarFocusHowmuchisthehat?这顶帽子多少钱?Howmucharethoseblacktrousers?那些黑色的裤子多少钱?询问价格常用疑问句型Howmuch...?意为“……多少钱?”其同义结构:What’sthepriceof...?*这支钢笔的价格是多少?What’sthepriceofthepen?基数词仔细观察例句,体会并写出基数词的构成规律。1.Ihavefourpens,fivepencils,sixerasersandtwelvebooks.(1～12的基数词无规律)2.
3、Thirteenboysandeighteengirlsareintheclassroom.(十三到十九,七个词词尾都有teen)3.Twentyandthirtyisfifty.(从二十开始,整十位数二十到九十,八个词词尾都有ty)4.Thetrousersaretwenty-sevendollars.(表示几十几的数字,两词中间加-)1.基数词的表达法数 字基数词形式例 词0～12各自独立zero0;one1;nine9;twelve1213～193～9+重读teen结尾特殊:thirteen13;fift
4、een15;eighteen18一般:fourteen14;sixteen1620～90整十位数以ty结尾twenty20;thirty30;forty40;fifty50;sixty60;seventy70;eighty80;ninety90两位数(几十几)整十位数-个位数twenty-one21;thirty-five35;ninety-eight98【巧学妙记】基数词记忆规则基数词太难记，找出规律就容易；零至十二无规律，一个一个单独记。后加-teen为十几，thirteen，fifteen看仔细，eigh
5、teen只有一个t；-ty是几十的标记，twenty却是很奇怪，forty本身也不乖，跟着也把规则坏，thirty，fifty更厉害，和eighty一起搞例外；十位后面是个位，表示数字“几十几”，连字符号莫丢弃，要表“几百几十几”，and常把百、十系。还有一项须注意，“几百”后别把-s立；巧学妙记加练习，hundred就是你成绩。2.基数词的用法基数词只能修饰可数名词,要注意数词和名词在数上要保持一致。twocups两个杯子twentyapples二十个苹果(2)表示编号时,用“事物+基数词”。例如:Class
6、Four四班Room302302房间(3)表示年龄。Heisfortyyearsold.他四十岁了。(4)表示时刻。5:34读作fivethirty-four9:28读作ninetwenty-eightT-shirt,hattrousers,skirtsweater,socksshorts,shoesjacket,bagMakesentencesinthechartwiththewordsinthethreeboxes.3ayellow,greenpurple,bluebrown,redwhite,blackH
7、owmuchis…?Howmuchare…?theyellowT-shirtthethisthatthesethosethepurplehatthisgreenskirtthatredbagthatwhiteskirttheblueT-shirtthebrownsockstheredshoestheseblueshortsthosepurplesockstheblackshorts3b1.Howmuchisthehat?_______________2.Howmuchisthebag?_____________
8、__3.HowmuchistheT-shirt?_____________4.______________________They’rethreedollars.5._______________________It’sninedollars.6.____________________It’seightdollars.It’sfivedollars.It’stendollars.It
