四川省绵阳市2019中考英语总复习第二篇语法突破篇语法专题04数词课件.ppt

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1、绵阳专版 PART TWO第二篇 语法突破篇语法专题（四）数词 【中考考点】(1)数词的构成。(2)数词的表达方式及用法。 1.基数词的构成1.基数词的构成(1)012单独记。如: zero, one, two, three等。(2)1319是在个位数后加-teen。如:fourteen, seventeen等,但13thirteen,15fifteen,18eighteen需要特殊记。(3)20以上的整十的基数词均以-ty结尾。如:20twenty,30thirty,40forty,50fifty,80eighty等。(4)“几十几”要加连字符号“-”。如:48forty-eight, 97

2、ninety-seven等。考点一数词的构成 (5)“几百几十”或者“几百几十几”在“百”后加and。如:156one hundred and fifty-six, 509five hundred and nine等。(6)四位数或者四位数以上的基数词的拼写规律:从右往左每三位加一个逗号,第一个逗号读作thousand(千),第二个逗号读作million(百万),第三个逗号读作billion(十亿),hundred后莫忘“and”。如:3,610three thousand six hundred and ten; 94,295ninety-four thousand two hundred

3、and ninety-five;274,350two hundred and seventy-four thousand three hundred and fifty等。 2.序数词的构成(1)“第一”、“第二”、“第三”分别是 first, second, third。(2)“第四”到“第十九”除fifth, eighth, ninth, twelfth外,其余的都在相应基数词后面加“-th”构成。如:fourth。(3)20以上的整十的序数词由相应的基数词变y为i,再加“-eth”。如:thirtythirtieth; fiftyfiftieth。(4)第一百hundredth; 第一千

4、thousandth; 第一百万millionth。(5)20以上的非整十的基数词变序数词时,只变化个位数。如:twenty-onetwenty-first; one hundred and oneone hundred and first。 【巧学妙记】 基变序,有规律,一、二、三特殊记 (first, second, third),八加h,九去e,ve要用f替,整十变y为ie,末尾-th莫忘记, 若想表示第几十几,只变个位就可以。 考点二数词的表达方式 March 12（th）, 20172017年3月12日one third 三分之一two thirds 三分之二five (oclock

5、) 5点钟 five past seven 7点5分twenty to eight 7点40分Page 62/the sixty-second page 第62页in the 1970s 在20世纪70年代 in his forties 在他四十多岁时 1.hundred, thousand, million前有基数词修饰时,表示确数,其后不加“-s”,也不与of连用;但若用于表示“数百、数千、数百万、数十亿”这样的概数时,后面则加“-s”,并与of连用。There are two hundred people in the meeting.会上有200人。Thousands of peopl

6、e go to the beach every year.每年成千上万的人到海滨去。Millions of people in the world are sending and receiving e-mails every day.每天,世界上有数百万人在收发邮件。2.序数词前加不定冠词a,表示“再一,又一”。Ill have to do it a second time.我必须再做一次。(已经做过一次)考点三数词的注意事项 3.其他重要表达方式:(1)half an hour 半个小时(2)one and a half years=one year and a half 一年半(3)in

7、 ones thirties在某人三十多岁时(区别:in the thirties在30年代)(4)two more hours =another two hours 再多两个小时 考点过关训练.用括号中所给单词的适当形式填空1.My (one) name is Linda. What about yours? 2.Today is the boys (twelve) birthday. He is 12 years old. 3.On my sisters (nine) birthday, I gave her a useful book. 4. (hundred) of people co

8、me here to relax every day. 5.Three (four) of the students in our class like basketball. 6.Linda won the (two) prize in the singing competition. 7.Linlin is (five) years old;today is her (five) birthday. 8.In the (eight) picture, you can see many young trees. 9.My grandparents live in an old apartme

9、nt with (four) floors and they are on the (three) floor. 10.The lady became very famous in her (forty). Hundreds twelfthninthfirst fifthsecondfivefourths forties four third eighth 考点过关训练.根据句意及汉语提示完成句子11.Amy will be an elder sister.Her parents are going to have the (第二) child. 12. (五分之二) of the land in that town is covered with trees and grass. 13.Children usually attend primary school at the age of (六) in China. 14.I hear youve got a “library” at home.Yes.Ive already had (数以百计的) books. 15.Today is Marys (二十一岁) birthday. secondTwo fifths sixhundreds oftwenty-first