高二下学期英语语法专题学案：数词

语法专题三：数词第第页高二年级英语学案编号(G003)评价：学生姓名：课题：数词授课教师：上课时间：第周一．分类基数词和序数词二.基数词的读法和写法写法:每3位点一逗号1,123,456,789第1个逗号_______________(千)第2个逗号______________（百万）第3个逗号______________（十亿）读法：百位与十位加and;十位与个位加“—”125_______________________________ 1,089______________________________22,377____________________________ 1,255,000___________________________三.序数词1.基数词变序数词口诀:一二三要全变，其他th加后面，f替_______,八______,九______，ty变成________。2.注意(1)冠词的选择：the+序数词+n.表“_______”thesecondtime“第二次”a/an+序数词+n.表“_______”asecondone“再来一个”eg.We'vetrieditthreetimes．Mustwetryit___fourthtime?定语从句中，当先行词被序数词修饰时，引导词只能用_______;eg.Thisisthefirstbook_________Iboughtyesterday.四.三明大法1.前有数字，不加s，不加of100个学生_____________________500个学生_____________________2.前无数字，加s加of成千上万的学生______________________成百上千的学生______________________五．功能１.表编号：第五课 _______________/___________(注意大小写)801房间 ________________3路车 ________________四楼 ________________地下2层 2.表时间点:整读法：用o’clock12点________________顺读法:7:20_______________逆读法: 半小时以内_________ eg.________________________半小时以上_________ eg.________________________15分/45分用____________eg.___________________________30分钟用_______________eg.___________________________7:15_________________7:20_______________7:30_______________7:45_________________7:50_______________3.表日期:美式：月,日,年Oct.1st,2012读法：__________________英式：日,月,年1stOct.,2012读法:_____________________

读法：May5（读作Maythefifth）也可以表示为thefifth（5th）ofMay4.半数表达法:半小时________________一个半小时________________________________两个半小时________________/________________5.分数表达：__________________________________________________________1/3:____________2/3:____________1/2:____________1/4:____________但常用aquarter考点：Twothirdsofthestudents________(be)girls.Threefifthsoftheair_________(be)dirty.倍数:两倍_______三倍_______四倍_______eg.地球是月球的49倍。Theearthis__________________________themoon.小数表达法（与汉语读数一致）点用_____________eg.21.375______________8.数字的复数用法(1)年代表达:20世纪80年代______________或______________(2)在某人…….岁的时候______________在某人二十多岁的时候______________在某人三十多岁的时候______________特例：在某人十多岁的时候___________另外的……请再/多给我5分钟的时间another+数字+n._____________________________数字+more+n._____________________________数字+n.+more_____________________________9.每，每隔every+基数词+名复every+序数词