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时间:2020-02-26
《英语人教版九年级全册复习数词的用法.ppt》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、英语数词用法一、数词的分类表示精确的数量数词基数词:序数词:表示顺序(后面常跟名词复数,1除外)oneapple,twoapplesthefirstapple,thesecondapple1.基数A.从1——10B.从11——19一般在后面加teenC.从21——99整十在后面加-tyD.几十几:one,two,three,four,five,six,seven,eight,nine,teneleven,twelve,thirteen,fourteen,fifteen,sixteen,seventeen,eighteen,nineteen.特殊:twenty,thirty
2、,forty,fifty,eightytwenty--one,twenty--twoE.百位数101ahundredandoneF.千位数以上thousand千million百万billion十亿G.1)基数词表示确切的数时,不用复数形式.2)表示不确切数,如成百、成千上万,则用复数+of。Therearehundredsofpeopleinthehall.320threehundredandtwenty有数字无s,无of;无数字有s,有of1.Thereare___studentsinourclass.A.fiftiethB.fifty-fiveC.fiftyfive2
3、.Eight___peoplecametovisitheretoday.A.hundredofB.hundredC.hundredsof3.Weplanted___treeslastweek.A.3hundredB.hundredofC.3hundreds4.Therearemany___starsinthesky.A.thousandB.thousandofC.thousandsof2.序数词特殊:其他:添加“th”。如sixth、nineteenthA.第一至第十九first,second,third,fifth,eighth,ninth,twelfth基变序,有规律
4、123特殊记(first,second,third)8去t,9去e(eighth,ninth)f来把ve替,后面再加th(fifth,twelfth)B.从第二十至第九十九整十变y为ie,再加“th”构成。twenty——twentieththirty——thirtieth表示第几十几时,用几十的基数词+连字符“-”+个位序数词第三十一第五十六第七十三第九十九thirty-firstfifty-sixthseventy-thirdninety-ninthC.序数词的缩写形式:阿拉伯数字后加上th。first—lstsecond—2ndthird—3rdfourth—4
5、thtwentieth—20thtwenty-third—23rd1.Thereare__daysinaweek.Mondayisthe_day.A.seven,twoB.seven,secondC.theseventh,two2.Thebuildinghas___floors.Heliveson___floor.A.twelve,twelfthB.twelfth,twelveC.twelve,thetwelfth3.Thereareninety__hereA.personB.peopleC.man3.数词的其他用法:一、时刻表示法(用基数词)1、顺读法:从左到右,先读
6、时刻,再读分钟2、逆读法:从右到左,先读分钟,再读时刻5:00fiveo’clock4:20fourtwenty几点过几分(≦30分钟)past几点差几分to八点过一刻七点过五分差十分八点差一刻十二点差二十分六点1:582:02fivepastsevenaquarterpasteighttentoeightaquartertotwelvetwentytosixtwototwotwopasttwo一刻(15分钟):aquarter二、加减乘除表示法(动词用三单)1.“加”用plus,and或add表示Howmuchistwoplusthree?Twoandthree
7、isfive.2.“减”用minusHowmuchistenminussix?3.“乘”multiply或time3X4=?Howmuchisthreetimesfour?4.“除”用divide的过去分词形式表示16÷4=?Howmuchissixteendividedbyfour?选择填空。1.Marchis____monthofayear.A.athreeB.thethirdC.athird2.Wewillhaveameetingat8:05____.A.fivetoeightB.eightfiveC.eightof
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