《中考英语数词知识点专项梳理课件.pptx》由会员分享,可在线阅读,更多相关《中考英语数词知识点专项梳理课件.pptx(18页珍藏版)》请在taowenge.com淘文阁网|工程机械CAD图纸|机械工程制图|CAD装配图下载|SolidWorks_CaTia_CAD_UG_PROE_设计图分享下载上搜索。
1、中考英语之数词专项,知识导图,知识点梳理,数词是指表示数目多少或顺序先后的词。表示数目多少的数词叫_,如 one, five, ten, thirty, sixty-five 等;表示顺序先后的数词叫_,如 first, sixth, tenth, twenty-first 等。,基数词,序数词,1.基数词 (1) 112的基数词是:one, two,.ten, eleven, twelve. (2) 1319的基数词:分别在39的基数词后加词缀teen,但要注意几个特殊变化的基数词: 13_,15_, 18_ (3) 2090基数词: 20_,30_, 40_,50_,60sixty,70s
2、eventy, 80eighty,90ninety (4) 2129的基数词: 21twenty-one,22twenty-two,23twenty-three, 24twenty-four,25twenty-five,thirteen,fifteen,eighteen,twenty,thirty,forty,fifty,2.序数词 (1) 119的序数词除了第一(first),第二(second)和第三(third)之外,其他的序数词是由基数词加后缀th构成的。 例如:第四 fourth,第六sixth,第七seventh等。注意几个序数词的特殊变化:fifth 第五,eighth 第八,n
3、inth 第九,twelfth 第十二。 (2) 两位数的序数词如果包含19的个位数,十位数用基数词,个位数用序数词。 例如:第21twenty-first,第34thirty-fourth。 例如:1978年3月18日:_,March 18th, 1978,基变序,有规律,结尾加上th; 一二三,特殊记,结尾字母t,d,d; 八去t,九去e,f来把ve替; ty将y变ie,后加th别忘记; 要是遇到几十几,只变个位就可以。,1.定冠词the和序数词连用表示顺序。(第几) 例如:the second 2.分数表示法:分子基数词,分母用序数词,除了分子是“1”的情况外,分母的序数词都要用复数。
4、one third: 1/3; two thirds_ ; a (one) quarter 或one fourth:1/4,分子 基数词 分母 序数词,one fifth,分子 1 分母 + s,two sevenths,分子 a 分母 quarter,a quarter,three quarters,a half,three and one third,基数词 + and + 分数,2/3,3.年、月、日、时的表示法,4.钟点的表示:小时、点钟、分钟、秒钟要用基数词。 (1)“几点过几分,30分钟”用介词past。 如:7:05five past seven;7:15fifteen(a qu
5、ar- ter)past seven; 7:30half past seven。 (2)“差几分几点”用介词“to”。注意:整点加“1”且用 60 减去目 前的分钟数。 如:7:40twenty to eight;7:45fifteen(a quarter) to eight。 (3)日常生活中的时间读法常常简化,直接按基数词的顺序读。 如: 7:05seven o five;7:15 seven fifteen,表示在几点钟用介词 at,one oclock,ten past two,half past three,twenty to five,a quarter past five,a q
6、uarter to seven,seven fifty,一个半小时 两个半小时,two and a half hours = two hours and a half,one and a half hours = one hour and a half,半的表示法,1. The boy always stays there for _. A. three and half hour B. three hour and a half C. three and a half hours,C,注意事项: (1) 基数词可以用来表示年级、班级、房间号码、电话号码和编号。并且单词开头字母要大写。例如:I
7、 am in Class Five, Grade Nine. (2) 基数词的单位hundred,thousand,million和billion等用来表示具体数目,前面有具体的基数词时,这些词的后面不加s。例如:ten hundred; 但是当hundred,thousand,million和billion等用来表示不具体的数目时用“hundreds/ thousands/millions/ billions of 名词”来表示,这些词的前面也不用具体的基数词。例如:hundreds of,一般编码用 名词 + 基数词 207房 三年级一班 第五部分 第一课 3 号汽车 第一中学,Room
8、207 Class One Grade Three Part five = the fifth part Lesson one = the first lesson Bus No.3 = the No.3 bus No. 1 Middle School,编号的表示法,1. There are _ days in a year. A. three hundreds sixty-five B. three hundreds and sixty-five C. three hundred and sixty-five D. three hundred and sixty five 2_people
9、visit this museum every day. A. Hundred B. Hundreds C. Hundred of D. Hundreds of 3_ trees have been planted in our school in the past 10 years. A. Thousands of B. Two thousands C. Thousand of D. Two thousand of 4. Kate won the _ race in the summer sports meeting. A. 100-metre B. 100-metres C. 100 me
10、tre D. 100 metres,【综合练习】,5._of the students_boys in our class. A. One fifth; are B. One fifths; are C. First fifths; is D. One five; is 6. He began to work there_. A. on his fifty B. at age of fifty C. when he fifty D. in his fifties 7. We all like the_ boy. A. of ten years old B. ten-year-old C. at ten old D. of age of ten 8. There are_ months in a year. December is the_month of the year. A. twelve; twelve B. twelve; twelfth C. twelfth; twelve D. twelve; twelveth.,【综合练习】,Goodbye,