人教版七年级英语上册专项复习-数词课件.ppt

1、专项复习-数词基数词和序数词学习目标 1.知识目标：掌握基数词和序数词 2.技能目标：学会运用基数词和序数词 3.情感目标：让学生在日常生活中多使用数词 复习案复习案数词数词-就是表示事物的数量就是表示事物的数量和顺序的词和顺序的词,分为基数词和序分为基数词和序数词两种。数词两种。数数词词基数词基数词序数词序数词表示事物的数量表示事物的数量表示事物的顺序表示事物的顺序(1)1-12分别由从分别由从one到到twelve12个个各不相同的词表示。各不相同的词表示。0 zero 1 one 2 two 3 three 4 four 5 five 6 six 7 seven 8 eight 9 ni

2、ne 10 ten 11 eleven 12 twelve 基数词基数词构成方法如下：构成方法如下：13 thirteen 14 fourteen 15 fifteen 16 sixteen 17seventeen 18 eighteen 19 nineteen(2)13-19均以后缀均以后缀-teen结尾。结尾。20 twenty 30 thirty 40 forty 50 fifty 60 sixty 70 seventy 80 eighty 90 ninety(3)20-90的整十数词均以后缀的整十数词均以后缀-ty结结尾。尾。表示表示“几十几几十几”时时,个位和十位之个位和十位之间需加

3、连词符间需加连词符,如如:twenty-one,thirty-two,forty-three.(4)三位数数词三位数数词:百位和十位百位和十位(若无十位则和个位若无十位则和个位)之间用之间用and连接连接,十位和个位间用十位和个位间用“-”连接。连接。156 one hundred and fifty-six;810 eight hundred and ten 204 two hundred and four;小小练兵场（抢答）拼出下列基数词。8 50 12 64 20 87 35 42 99 78eighttwelvetwentythirty-fiveninety-ninefiftysixt

4、y-foureight-sevenforty-twoseven-eight探究案小组讨论基数词的用法：1.表示人，物的数量。基数词放在名词前。表示人，物的数量。基数词放在名词前。Five apples2.表示年龄，基数词放表示年龄，基数词放 year(s)old前前.Two years old.3.用于计算。用于计算。What is two and three?It is five.4.表示顺序，编号等。一般放在名词后。表示顺序，编号等。一般放在名词后。Lesson One.5.用来表示时间。用来表示时间。At three fifteen 6.表示年代表示年代 in 1998快乐练兵场 1.H

5、e has (6)balls.2.She is (9)years old.3.Tom is in Class (4)4.It is about (12)oclock 5.11 and _19 is_ 30 sixnine Fourtwelveelevennineteenthirtyone two three four five six seven eight nine tenfirst second third fourthfifth sixth seventh eighth ninth tenth 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th eleven

6、 twelve thirteen fourteen fifteen sixteen seventeen eighteen nineteen twenty eleventhtwelfth thirteenth fourteenth fifteenth sixteenth seventeenth eighteenth nineteenth twentieth11th 12th13th14th15th16th17th18th19th20th基数词基数词 Cardinal Numbers 序数词序数词 Ordinal Numberstwenty-one twenty-two twenty-three

7、thirty forty fifty sixty seventy eighty ninety hundredtwenty-first twenty-second twenty-third thirtieth fortieth fiftieth sixtieth seventieth eightieth ninetieth hundredth 21st 22nd 23rd 30th 40th 50th 60th 70th 80th 90th 100th基数词基数词 序数词序数词基变序规律基变序规律【记忆口诀记忆口诀】基变序，容易记，一般在基数词词尾加基变序，容易记，一般在基数词词尾加-th。一、

8、二、三特殊记，（一、二、三特殊记，（one first 第一第一 two second 第二；第二；three third 第三）第三）八去八去t,，九去，九去e,ve要用要用f替，然后再加替，然后再加-th。（。（特殊：特殊：fivefifth第五；第五；eight eighth 第八；第八；nineninth 第九第九twelve twelfth 第十二）第十二）整十变化需注意，把整十变化需注意，把y变变i加加eth.若是遇到几十几，只变个位就可以。若是遇到几十几，只变个位就可以。序数词表顺序，一般须加定冠词序数词表顺序，一般须加定冠词the。20,3040,50,60,70,80,90-

9、ty变为变为-tie再加再加thtwenty twentieth 第二十第二十thirty thirtieth 第三十第三十forty fortieth 第四十第四十fifty fiftieth 第五十第五十sixty sixtieth 第六十第六十seventy seventieth 第七十第七十eighty eightieth 第八十第八十ninety ninetieth 第九十第九十其余两其余两位数位数将相应基数将相应基数词的个位改词的个位改为基数词为基数词twenty-one twenty-first 第第二十一；二十一；thirty-nine thirty-ninth第三十九；第三十

10、九；forty-six forty-sixth 第四十六第四十六小小练兵场（抢答）拼出下列序数词。9_ 3_ 12_ 2_ 20_ 8_ 55_ 43_ 69_ 91_ninthtwelfthtwentiethfifty-fifthsixty-ninththirdsecondeighthforty-thirdninety-first探究案小组讨论序数词的用法：1.表示日期。October the first2.表示某人第多少岁的生日。his fiftieth birthday.3.表示事物的顺序，编号。the first lesson.小小练兵场（抢答）1.Monday is the _(2)

11、day of the week.We must go to school.2.The _(12)month of a year is December.3.The_ (24)lesson is very easy for me.4.My fathers birthday is on December_(20)second twelfthtwenty-fourth twentieth当堂检测（基序混合）选择1.The_ month of the year is FebruaryA.one B.first C.two D.second2.December is the_ month of the

12、year.A.twelve B.twelveth C.twelvieth D.twelfthDDD 3.Please turn to Page and look at the picture.A.Fifth,five B.Five,fifth C.Fifth,fifth D.Five,five B4.There are seconds in a minute A.fourty B.forty C.sixteen D.sixtyD 5.Peter,how old is your father this year?_ _.And we shall have a party for his_ birthday tomorrowA.Fortieth,forty B.Forty,fortyC.Forty,fortieth D.Fortieth,fortieth C