七上复习课件 基数词转换成序数词.ppt

one two three four five six seven eight nine ten eleven twelve thirteen fourteen fifteen sixteen seventeen eighteen nineteen twenty thirty forty fifty sixty seventy eighty ninety twenty-one … twenty-nine thirty-one … thirty-nine forty-one … forty-nine fifty-one … fifty-nine sixty-one … sixty-nine seventy-one … seventy-nine eighty-one … eighty-nine ninety-one … ninety-nine hundred Learn these numbers and find out the rules: 掌握基数词的拼写。 请将基数词转换成序数词 one two three four five six seven eight nine ten first second third fourth fifth sixth seventh eighth ninth tenth eleven twelve thirteen fourteen fifteen twenty thirty twenty-one th th th th twelfth twentieth thirtieth twenty first 1st first 2nd second 3rd third 4th fourth 5th fifth 6th sixth 7th seventh 8th eighth 9th ninth 10th tenth 11th eleventh 12th twelfth 13ththirteenth 14th fourteenth 15th fifteenth 16th sixteenth 17th seventeenth 18th eighteenth 19th nineteenth 20th twentieth 21st twenty-first 22nd twenty-second 23rd twenty-third 24th twenty-fourth 25th twenty-fifth 26th twenty-sixth 27th twenty-seventh 28th twenty-eighth 29th twenty-ninth 30th thirtieth 31st thirty-first Learn these numbers and find out the rules: -What is the date today? -It’s January 11th. 1st first 2nd second 3rd third 4th fourth 5th fifth 6th sixth 7th seventh 8th eighth 9th ninth 10th tenth 11th eleventh 12th twelfth 13th thirteenth 20th twentieth 21st twenty-first 22nd twenty-second 23rd twenty- third 40th fortieth 50th fiftieth 90th ninetieth 100th one hundredth 101st one hundred and first 基变序，有规律；多数词尾加 th. 一二三特殊记，词尾字母 t,d,d. 八减 t, 九去e ; f来把ve替，然后再加 th。 整十变化须注意，变y为ie，然后再加 th。 若要遇到几十几，个位变序就可以。 序数词表示顺序，前面要用定冠词the。 There are _______months in a year. May is