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 one two hree four five six seven eight nine ten 基数词 11-19 eleven twelve thirteen fourteen fifteen sixteen seventeen eighteen nineteen 基数词 整十 twenty thirty forty fifty sixty seventy eighty ninety 序数词 first second third fourth fifth sixth seventh eighth ninth tenth 基数词 one two three four five six seven eight nine ten 简写 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 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 seventeenth eighteenth nineteenth eleven twelve thirteen fourteen fifteen sixteen seventeen eighteen nineteen 规则变化直接加th 11st 12nd 13rd 14th 15th 16th 17th 18th 19th twentieth thirtieth fortieth fiftieth sixtieth seventieth eightieth ninetieth twenty thirty forty fifty sixty seventy eighty ninety 整十基数变序数，先把ty变成tie。 有迹可循 21 twenty one 22 twenty two 23 twenty three 24 twenty four 25 twenty five 26twenty six 27twenty seven 28 twenty eight 29twenty nine twenty twenty twenty twenty twenty twenty twenty twenty twenty first second third fourth fifth sixth seventh eighth ninth 21st 22nd 23rd 24th 25th 26th 27th 28th 29th 基数词 序数词 月份 几十几 第32 第43 第51 第66 第75 第87 第99 thirty second forty third twenty first sixty sixth seventy fifth eighty seventh ninety ninth 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。　 Have a try 1.Tom is 5 years old. It's his ___ birthday . A.  five  B.  fiveth  C.fifth    2.It's my ___ time to work with you. A. a     B. one     C. first 3. Is Sunday the ____ day of the week? A. a     B. one     C. first 4.The yellow river is the _____ longest river in China. A.  two  B.  second  C.  third 5.March the _____month of the year. A. third    B. three     C. 3     C B A C C 6. September the _____ is the Teacher’s Day. A. n