最新初中英語語法數(shù)詞教案

1、第3單元數(shù)詞（一）基數(shù)詞1、1100的構(gòu)成onetwothreefourfivesixseveneightnineteneleventwelvethirteenfourteenfifteensixteenseventeeneighteennineteentwentythirtyfortyfiftysixtyseventyeightyninetyone hundred2、3位數(shù)構(gòu)成，例如234 讀作：two hundred and thirty-four3、hundred, thousand, million表示確切數(shù)目不加s 如：three hundred people,但表示不確切數(shù)字時(shí)應(yīng)加

2、s,如thousands of stars4、千位以上的數(shù)，從個(gè)位向左數(shù)，每三位加一個(gè)“，”，第一個(gè)逗號(hào)前為thousand,第二個(gè)逗號(hào)前為million,第三個(gè)逗號(hào)前為billion,如7,543，812，應(yīng)為seven million, five hundred and forty-three thousand, eight hundred and twelve.注意在百位數(shù)和十位數(shù)之間要用and連接。（二）序數(shù)詞1、序數(shù)詞構(gòu)成注意first, second, third, fifth, ninth, twentieth, twenty-first, etc.的特殊形式。2、序數(shù)詞用于句中

3、，它之前需加the,但有時(shí)用不定冠詞a(an)表示“再一，又一”如Try it a second time, please. When I sit down, a third man came in. （三）分?jǐn)?shù)基數(shù)詞代表分子，序數(shù)詞代表分母。分子大于1時(shí)，分子的序數(shù)詞用單數(shù)，分母序數(shù)詞用復(fù)數(shù)。1/2one half or a half 1/4one fourth or a quarter 4/5 four fifths 6 ,5/9 six and five ninths （四）時(shí)刻表達(dá)法225，two twenty-five or twenty-five past two 340，thre

4、e forty or twenty to four （五）日期表達(dá)法2002年5月20日May 20th, 2002, the twentieth of May, 2002 注意：帶有數(shù)詞的名詞作定語時(shí)，一般用單數(shù)形式a seven-year-old boy a hundred-metre race a five-pound note （六）倍數(shù)表示法A. 主語謂語倍數(shù)（或分?jǐn)?shù)） as adj. as。例 I have three times as many as you.我有你三倍那么多。B. 主語謂語倍數(shù)（分?jǐn)?shù)） the size （amount，length） of。例 The earth is 49 times the size of the moon.地球是月球的49倍。C. 主語謂語倍數(shù)（分?jǐn)?shù)）形容詞（副詞）比較級(jí) than。例 The grain output is 8 percent higher this year than that of last year.今年比去年糧食產(chǎn)量增加8%。D. 還可以用by 倍數(shù)，表示增加多少倍。例 The pro