Unit7Howmucharethesesocks?第四课时SectionB(1a～1e)1.基数词基数词的写法：(1)1～12，拼写和读音没有什么相似之处，无规律可言，应逐一进行记忆。(2)13～19，表示“十几”，在个位数后加后缀teen，并且重音在后。注意(13)thirteen，(15)fifteen分别由three和five转化而来；(18)eighteen是eight中加een而来。(3)twenty～ninety整十以ty结尾。(4)几十几要用连字符。eg：24twentyfour(5)三位数的词需注意百位和十位之间加and。eg：148onehundredandfortyeight2.基数词的巧记方法：英语数词不难记，找出规律就容易。零至十二样各异，一个一个单独记，后加teen变十几，thirteen，fifteen看仔细。eight原本就有t，eighteen只缺een。二十至九十后加ty，twenty不同重点记，forty去掉字母u，thirty，fifty更出奇，十位数后个位数，表示数值几十几，按序排列不费力，连字符号莫丢弃，巧学巧记加努力，hundred是你好成绩。一、写出下列数词的左邻右舍。1．___eleven________2．________twenty__________3．__________fifteen________4．____________thirty__________5．___________thirtynine_____tentwelvenineteentwentyonefourteensixteentwentyninethirtyonethirtyeightforty二、用适当的基数词完成下面的等式。6．six＋____________＝twentynine7．thirtyone－fourteen＝__________8．________＋thirteen＝twentyfive9．three×six＝_________10．thirty÷two＝________twentythreeseventeentwelveeighteenfifteen三、用括号内所给词的适当形式填空。11．Howmuch____(be)theTshirts?12．Sheneeds120_______(dollar)foranewbike.13．Doyoulike_________(sweater)?14．Arethose______(sock)underthechairyours?15．He____(have)alongshirt.aredollarssweaterssockshas四、单项选择。16.—Howmuch______thesweater?—______25dollars.A．does，ItB．are，TheyC．are，They'reD．is，It's17．Herblackshoes______18yuan.A．isn'tB．isC．aren'tD．don't18．—Iwantthisblackandwhitebag.—______．A．HereareyouB．HereyouareC．GiveyouD．Youarehere19．—Youlookpretty(漂亮的)inred.—______．A．Don'tsaysoB．YouarerightC．ThankyouD．OK20．—Howmucharethesocks?—Threedollars______twopairs.A．withB．onC．forD．in五、根据汉语完成句子，每空一词。21．那些蓝袜子多少钱？___________arethosebluesocks?22．短袜三美元一双。______are...
