(
课件网) 数词的表达3 大数、半数及数字运算 初中英语语法课件 ENGLISH LESSON 英 英 语 语 堂 堂 课 课 目 录 01 大数的表达 02 03 半数的表达 数字的运算 PART ONE 大数的表达 数字 形式 例词 100~ 999 整百 位数 由1~9后面加“hundred(百)”构成。 100→one hundred; 200→ two hundred 300→three hundred; 500→five hundred 600→six hundred; 700→seven hundred 800→eight hundred; 900→nine hundred 非整百 位数 由“整百位数+整十位数+个位数”构成,百位数与十位数之间用“and”连接,十位数与个位数之间用连字符“-”连接。如果没有十位数,则百位数和个位数之间用and连接。 223→two hundred and twenty-three 320→three hundred and twenty 444→four hundred and forty-four 108→one hundred and eight one hundred /w n h ndr d/ 百 100 one thousand / w n θa znd / 千 1000 ten thousand / ten θa znd / 万 10000 one hundred thousand / w n h ndr d θa znd / 十万100000 million / m lj n/ 百万1000000 ten million / ten m lj n/ 千万10000000 a hundred million / h ndr d m lj n/ 亿 100000000 billion / b lj n/ 十亿 1000000000 ≥ 100 100 a/one hundred; 1,000 a/one thousand; 1,000,000 a/one million; 1, 000,000,000 a/one billion = a/one thousand million 记住哦！ 1,000以上的基数词的读法 从右至左三逗开，一逗千，二逗百万， 三逗就是十万万，左右三位分开读， 987，210，978，564 千 百万 十万万 five billion, one hundred and twenty-three million, four hundred and fifty-six thousand, one hundred and twenty four 5,1 2 3,4 5 6,1 2 4 1,000以上的基数词的读法 读一读 PART TWO 半数的表达 half是一半的意思，可以用作名词、形容词或副词， 并且在不同的语境中具有多种用法和搭配。 I ate half of the apple. 我吃了一半苹果。 He only filled half the form. 他只填了一半表格。 I half agreed with your suggestion. 我部分同意你的建议。 The bottle is half full. 瓶子是半满的。 He was only half joking. 他只是半开玩笑的。 half作名词 half作形容词 half作副词 half作形容词 half作形容词 表示半个： half a/an + n.(s.) = a/an half + n.(s.) half a apple = a half apple half an hour = a half hour 表示一个半： a + n.(s.) + and a half = one and a half+ n.(pl.) an apple and a half. one and a half apple 两个半： two + n.(pl.) + and a half = two and a half + n.(pl.) two apples and a half two and a half apples We waited for half an hour . We waited for a half hour. 我们等了半小时。 It took the workers one year and a half to complete the building. It took the workers a year and a half to complete the building. 工人们花费了一年半的时间修建完成这个建筑。 She ate two cakes and a half yesterday. She ate two and a half cakes yesterday. 她昨天吃了两个半蛋糕。 固定搭配 ： half the time 一半的时间 Half the time, I don't even know what he's talking about. 一半的时间，我甚至不知道他在说什么。 half the price/cost 半价/半费用 I bought the book at half the price. 我半价买了这本书。 half an inch/mile 半英寸/英里 I'm just a half a mile from here. 我还有半哩路就到了。 PART THREE 数字的运算 is/are equals/equal makes/make is/are equal to 3+16=19 Three and/plus sixteen are/is nineteen. Three and/plus sixteen equal(s) nineteen. ... ...
