2023年小升初英语基数词变序数词课件

基数词是如何变序数的

你知道吗？基数词

1-10

onetwohreefourfivesixseveneightnineten

基数词

11-19

eleventwelvethirteenfourteenfifteensixteenseventeeneighteennineteen基数词

整十

twentythirtyfortyfiftysixtyseventyeightyninety序数词

first

second

third

fourth

fifth

sixth

seventh

eighth

ninth

tenth基数词onetwothree

fourfivesixseveneightnineten简写1st2nd3rd4th5th6th7th8th9th10th规则变化直接加th有迹可循一，二，三，特殊记，词尾字母t，d，d。

八去t，九除e，ve要用f替，y要改为ie，再把th后面加。eleventh

twelfth

thirteenth

fourteenth

fifteenth

sixteenth

seventeentheighteenth

nineteentheleventwelvethirteenfourteenfifteensixteenseventeeneighteennineteen规则变化直接加th11st12nd13rd14th15th16th17th18th19thtwentieth

thirtieth

fortieth

fiftieth

sixtieth

seventietheightiethninetiethtwentythirty

fortyfiftysixtyseventyeightyninety整十基数变序数，先把ty变成tie。有迹可循

21twentyone22twentytwo23twentythree

24twentyfour25twentyfive26twentysix27twentyseven28twentyeight29twentyninetwentytwentytwentytwentytwentytwentytwentytwentytwentyfirst

second

third

fourth

fifth

sixth

seventh

eighth

ninth

21st22nd23rd24th25th26th27th28th29th基数词

序数词

月份几十几

第32

第43第51第66第75第87第99thirtysecondfortythirdtwentyfirstsixtysixthseventyfiftheightyseventhninetyninth要是遇上2位数，十位基数，个位序，th最后加上去。有迹可循序数词口诀基变序，有规律，尾部要加-th。一，二，三，特殊记，词尾字母t，d，d。八去t，九除e，ve要用f替，y要改为ie，再把th后面加。若是碰到几十几，只变个位就可以，前用基来后用序。整十基数变序数，先把ty变成tie，要是遇上2位数，十位基数，个位序，th最后加上去。Haveatry1.Tomis5yearsold.It'shis___birthday.A.

five

B.

fiveth

C.fifth

2.It'smy___timetoworkwithyou.A.a

B.one

C.first3.IsSundaythe____dayoftheweek?A.a

B.one

C.first4.Theyellowriveristhe_____longestriverinChina.A.

two

B.

second

C.

third

5.Marchthe_____monthoftheyear.A.third

B.three

C.3

CBACC6.Septemberthe_____istheTeacher’sDay.A.nineth

B.ninth

C.nine

7.Decemberthe____isChristmas.

A.twenty-five

B.twenty-fifthC.twentieth-five

D.twenty-five8.Decemberisthe_______monthoftheyear.A.twelfthB.twelvethC.twelvieth9.ThecleverT-shirtsareonshowinthestore.Janelikes____.A.theninthB.thenineth