Unit+1+基数词序数词语法讲义 鲁教版初中英语六年级下册

基数词&序数词内容简介:1.基、序数词的定义及常用用法2.常考基、序数词表3.基数词变序数词记忆口诀4.习题基数词定义:基数词表示人或物的数量。用法:①表示人或物的数量:百位数和十位数之间或者百位数和个位数之间加and，十位数和个位数之间要用连字符“-”。twobooks两本书 twenty-oneapples二十一个苹果threehundredandforty-fivestudents三百四十五个学生②基数词表示顺序、编号时，由“单数名词+基数词”构成，此时名词和基数词的第一个字母通常大写。NO.1middleschool第一中学 Class7,Grade6六年级七班 Room203203房间③构成复合形容词:复合形容词的构成成分之间要用连字符“-”，并且名词要用单数形式。atwelve-year-oldboy一个十二岁的男孩④hundred(百)，thousand(千)，million(百万)，billion(十亿)的用法:在表示精确数量时，hundred，thousand等不用复数形式;当与“of+复数名词”连用时，表示模糊概念，这时hundred，thousand等要用复数形式。twohundred200 hundredsof...数以百计的序数词定义:序数词表示人或事物的次序，翻译成“第......”，通常要与定冠词the连用。用法:①表示事物的先后顺序：常与定冠词the连用，“the+序数词”，后面接单数名词。但当序数词前面有名词所有格、物主代词或指示代词修饰时，前面不能加the。Septemberistheninthmonthofayear.九月是一年中的第九个月。Today'sfirstclassisEnglish.今天的第一节课是英语。②表达日期:在表达“某月某日”时，“日”要用序数词。HisbirthdayisonMarch5th.他的生日是三月五日。常考基数词和序数词表:数字1-12数字基数词序数词简写数字基数词序数词简写1onefirst1st7sevenseventh7th2twosecond2nd8eighteighth8th3threethird3rd9nineninth9th4fourfourth4th10tententh10th5fivefifth5th11eleveneleventh11th6sixsixth6th12twelvetwelfth12th数字13-19数字基数词序数词简写数字基数词序数词简写13thirteenthirteenth13th17seventeenseventeenth17th14fourteenfourteenth14th18eighteeneighteenth18th15fifteenfifteenth15th19nineteennineteenth19th16sixteensixteenth16th数字(几十几)——以21-29为例数字基数词序数词简写数字基数词序数词简写21twenty-onetwenty-first21st26twenty-sixtwenty-sixth26th22twenty-twotwenty-second22nd27twenty-seventwenty-seventh27th23twenty-threetwenty-third23rd28twenty-eighttwenty-eighth28th24twenty-fourtwenty-fourth24th29twenty-ninetwenty-ninth29th25twenty-fivetwenty-fifth25th数字(整十)数字基数词序数词√or×数字基数词序数词√or×20twentytwentieth20th70seventyseventieth70th30thirtythirtieth30th80eightyeightieth80th40fortyfortieth40th90ninetyninetieth90th50fiftyfiftieth50th100hundredhundredth100th60sixtysixtieth60th注:在写序数词时，我们有时会用到缩写形式。一般习惯于用数字加上这个序数词的最后两个字母构成。基数词变序数词记忆口诀:基变序，有规律；一二三，特殊记。(first,second,third)结尾各是t,d,d,th要从四加起。八去t，九去e，ty变为tiefive,twelve两兄弟，要以f代ve。若是遇到几十几，只变个位就可以。习题:一、写出下列单词的序数词one_______ 2.two_______ 3.three_______ 4.five_______eight_______ 6.nine_______ 7.eleven_______ 8.twelve_______twenty_______ 10.thirty_______ 11.forty_______ 12.twenty-one_______用所给单词适当形式填空—What'sthe______(five)monthoftheyear？—It'sMay.Mondayisthe______(two)dayoftheweek.3.Nextweekishis______(twenty)birthday.4.Thisishis______(two)dictionary.5.Teacher'sDayisonSeptember______(ten).6.Ithinkthe______(five)lessonisreallydifficult.7.The______letterin“HAPPY”isA.8.Tomisfourteenyearsoldandt