中小学教育资源及组卷应用平台 第八章：数词 知识网络图 基数词的概念、用法 数词 序数词的概念、用法 第一节 数词的概念、构成、用法 一、小试身手 1. There are _____ months in a year. December is _____ month. A. twelve; twelve B. twelfth; the twelve C. twelve; the twelfth 2. I have six apples in the bag and eight apples in the box. I’ve got _____ apples. A. twelve B. fourteen C. sixteen 3. There are _____ days in a week. A.seven B. seventh C. sevens 4. My birthday is on the _____ of August. Three B. three C. third September is _____ month of a year. ninth B. the ninth C. the nine D. two time Tom was _____ to get to school and I was _____. first; ninth B. the first; the ninth C. the first; the nine 二、知识点解析 1. 基数词和序数词的概念 基数词：是用来表示数目多少的词，如：one, two, five, twelve, thirty, forty-eight 等。 序数词：序数词是表示顺序先后的词。 数词的构成 基数词 序数词 构成 1 one 1st first 1~12 为基数词的基本数词。序数词1~3为特殊变化。序数词4~12在基数词词尾加th构成。注意fifth（第五），ninth（第九）和twelfth（第十二）的特殊拼写。 2 two 2nd second 3 three 3rd third 4 four 4th fourth 5 five 5th fifth 6 six 6th sixth 7 seven 7th seventh 8 eight 8th eighth 9 nine 9th ninth 10 ten 10th tenth 11 eleven 11th eleventh 12 twelve 12th twelfth 13 thirteen 13th thirteenth 13和15拼写发生变化。 相应序数词在基数词后加th构成。 14 fourteen 14th fourteenth 15 fifteen 15th fifteenth 16 sixteen 16th sixteenth 17 seventeen 17th seventeenth 18 eighteen 18th eighteenth 19 nineteen 19th nineteenth 20 twenty 20th twentieth 20~90的整十数，基数词要加后缀ty。在构成序数词时，将词尾y变成ie再加th。 21 twenty-one 21st twenty-first 30 thirty 30th thirtieth 40 forty 40th fortieth 50 fifty 50th fiftieth 60 sixty 60th sixtieth 70 seventy 70th seventieth 80 eighty 80th eightieth 90 ninety 90th ninetieth 100 one hundred 100th one hundredth 整百位数由one~nine加hundred构成，序数词在词尾加th。 200 two hundred 200th two hundredth 数词的用法 （1） 基数词的用法 基数词在句中可以作定语、主语、宾语、表语、用于编号、时刻等。 ①作定语，如： I have one animal friend. 我有一个动物朋友。 Three boys are running along the bank. 三个男孩在沿着河岸跑步。 ②作主语。如: There are five children over there. Three are playing football and two are flying kites. 那儿有五个孩子。三个在踢足球，两个在放风筝。 Twenty years stands for a long period in one's life. 二十年在人的一生里意味着一个很长的时期。 ③作宾语。如： I’d like eight, please. 我想要八个。 I want to buy five books. 我想要买五本书。 ④作表语。如： I’m fourteen. 我十四岁。 We are sixteen． 我们是16个人。 ⑤用于编号、时刻等。如： You can take Bus No.168 to get there. 你可以乘168路公交车到达那儿。 It’s three o’clock. 现在是三点钟。 （2）序数词的用法 序数词可在句子中作主语、宾语、定语和表语。 ①作主语，如： The fourth is big and round. 第四个又大又圆。 The first of October is our national day. 十月一号是我们的国庆节。 ②作宾语。如: There are twenty stories in this book. I like the seventeenth best. 这本书有二十个故事。我最喜欢第十七个。 The man has ... ...
~~ 您好，已阅读到文档的结尾了 ~~
