小升初数词精讲.pptVIP

一、数词的概念表示人或事物的数目和顺序的词是数词。如：eight 8 nineteen 19 sixty-six 66  first 第一 tenth 第十 twenty-seventh 第二十七 二、数词的分类 数词分为基数词和序数词。 1.基数词 （1）1-19的基数词 one two three four five six seven eight nine ten eleven twelve thirteen fourteen fifteen sixteen seventeen eighteen nineteen (2)20-90的整十数基数词 twenty thirty forty fifty sixty seventy eighty ninety (3)非整十数基数词(十位和个位数之间用连字符号“-”) Twenty-three forty-four ninety-nine （4）101-999的基数词 ①整百基数词 five hundred 500 eight hundred 800 ②非整百基数词 one hundred and one 101 three hundred and sixty-five 365（5）1000以上的基数词 five thousand 5,000  nine thousand nine hundred and ninety-nine 9,999 thirty thousand 30,000（6）年代的读法：每两位数读一读  1997nineteen ninety-seven  2010 two thousand and ten 2.序数词（1）1-19的序数词 * 请读一读下面的句子 There were 450 sheep and 83 cows in the farm in 2005. 读作：There were four hundred and fifty sheep and eighty-three cows in the farm in two thousand and five. nineteenth第十九 eighteenth第十八 seventeenth第十七 fifteenth第十五 fourteenth第十四 thirteenth第十三 twelfth第十二 eleventh第十一 tenth第十10th sixteenth第十六 ninth第九9th eighth第八8th seventh第七7th sixth第六6th fifth第五5th fourth第四4th third第三3rd second第二2nd first第一 1st （2）20-90的整十数序数词：基数词词尾y变成i,再加eth/IT / ninetieth第九十 eightieth 第八十 seventieth第七十 sixtieth 第六十 fiftieth 第五十 fortieth 第四十 thirtieth第三十 twentieth第二十 two hundred and fifty-fourth 第二百五十254th eighty-first 第八十一81st thirty-third第三十三33rd twenty-eighth第二十八 28th （3）非整十数序数词 三、数词的用法 1.基数词的用法 （1）编号的事物用基数词 如：She is the No.one.她是第一名。 Today we are going to learn Lesson Three. （2）表示时间时用基数词。 如：eight o’clock 8点 eleven twenty-five 十一点二十五分（可从前到后依次读） twenty to eleven 十点四十分（分针大于30，可用to) a quarter past seven 七点一刻 (分针小于或等于30，可用past) （3）表示年龄时用基数词 如：He is twenty. 他二十岁了。 When she was six, she went to primary school. 当她六岁时，她上了小学。 （4）一些数学公式的读法 4+9=13：Four plus/and nine is thirteen. 15-7=8: Fifteen minus