序数词知识讲解.ppt

《序数词知识讲解.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、序数词Readthesenumbers14581112141518202130385060809099third第二第三表示数目顺序的词叫序数词secondfirst第一onetwothreefourfivesixseveneightnineteneleventwelvefirstsecondthirdfourthfifthsixthseventheighthninthtentheleventhtwelvefththirteenfourteenfifteensixteenseventeeneighteennineteenththththththth基数词序数词BingoTh

2、erule:请听老师报数，并在九宫格内随机位置写出相应数字的英语单词，然后由老师随机念5个单词，最先形成bingo（即最先将三个单词连成一条线）者为胜。如左图。×××twentythirtyfortyfiftysixtyseventyeightyninetytwentieththirtiethfortiethfiftiethsixtiethseventietheightiethninetiethtwenty-onetwenty-firsttwenty-twotwenty-secondtwenty-fourtwenty-fourth1.以-ty结尾的表示“几十”的基数词，先把

3、y变为i和e，再加-th2.表示“第几十几”时，十位数的“几十”仍用基数词，只把个位部分变成序数词就行了。请将下列数字转化为序数词twenty-threethirty-sixforty-onefifty-ninesixty-fiveseventy-eighteighty-sevenninety-twotwenty-thirdthirty-sixthforty-firstfifty-ninthsixty-fifthseventy-eightheighty-seventhninety-second数词PK请快速将基数词转化为序数词，或将序数词转化为基数词基变序，有规律。1，2，

4、3，特殊记，词尾字母t，d，d;(first,second,third)8减t，9去e，f来把ve替；(eighth,ninth)(fifth,twelfth)单词ty作结尾，ty变成tie;（twentieth）若是碰到几十几，只变个位就可以。（thirty-first，sixty-fourth）基数词变序数词的规律口诀：firstsecondthirdfourthfifthtwentiethtwenty-firstthirty-fifth序数词的简写形式:1st2nd3rd4th5th20th21st35th序数词的简写形式是由阿拉伯数字之后加上单词最后两个字母组成，读

5、音不变。请正确朗读下列序数词1st2nd9th12th30th22nd43rd15th89th序数词的基本用法Winteristhefourthseasoninayear.1.用来表示事物的顺序，如：冬天是一年中的第四个季节。thesecondlesson第二课序数词的基本用法the20thcentury或thetwentiethcentury2.表示年代世纪，如：20世纪：theseventies70年代：theseventiesofthe20thcentury或theseventiesofthetwentiethcentury20世纪70年代：序数词的基本用法Oct.1

6、st3.表示日期，如：10月1日：读作Octoberthefirst月份+the+序数词6月1日June1st/JunethefirstNovemberThanksgivingDayMarch3月8June6月1September9月10-What’sthedate?-It’s…April4月9November11月19May5月31April4月9November11月19May5月31月份英文简写英文全称一月Jan.January二月Feb.February三月Mar.March四月Apr.April五月May.May六月June.June七月July.July八月Au

7、g.Agust九月Sept.September十月Oct.October十一月Nov.November十二月Dec.DecemberReviewthemonth（复习月份）序数词的基本用法1/54.分数的表示：分子用基数词，分母用序数词，分子大于1时，分母用序数词复数。one-fifth2/3two-thirds2twoandseven-tenths请用英语正确表达下列分数1/42/73/81/31/2ahalf1.—Whenwasyourmotherborn?—Shewasbornon______.A.Ninet