加减乘除、小数、分数及百分数
<BR>一、加减乘除表示法 <BR> 1. “加”用plus,and或add表示;“等于”用is,make,equal等词表示。 <BR> 2+3=? 可表示为: How much is two plus three? <BR> 2+3=5 <BR> Two plus three is five. <BR> Two and three is equal to five. <BR> Two and three make five. <BR> Two added to three equals five. <BR> If we add two to/and three, we get five. 二加三等于五 <BR><BR> 2. “减”用 minus或 take from表示 <BR> 10-6=? How much is ten minus six? <BR> 10-6=4 <BR> Ten minus six is four. <BR> Take six from ten and the remainder is four. <BR> Six (taken) from ten is four. <BR> 十减去六等于四 <BR><BR> 3. “乘”用time(动词)或multiply表示 <BR> 3X4=? How much is three times four? <BR> 3X4=12 <BR> Three times four is/are twelve. <BR> Multiply three by four,we get twelve. <BR> Three multiplied by four makes twelve. <BR> 三乘以四等于十二 <BR><BR> 4. “除”用divide的过去分词形式表示 <BR> 16÷4=? How much is sixteen divided by four? <BR> 16÷4=4 <BR> Sixteen divided by four is four. <BR> Sixteen divided by four equals/gives/makes four. <BR> 十六除以四等于四。 <BR><BR> 二、分数表示法 <BR> 1. 分数是由基数词和序数词一起来表示的。基数词作分子,序数词作分母,除了分子是“1”以外,其它情况下序数词都要用复数形式。 <BR> 3/4 three fourths或 three quarters <BR> 1/3 one third或a third <BR> 24/25 twenty-four twenty-fifths <BR> 3 1/4 three and one fourth或 three and one quarter <BR> 1/2 a half <BR> 1/4 one quarter或a quarter <BR> 1 1/2 one and a half <BR> 1 1/4 one and a quarter <BR><BR> 2. 当分数后面接名词时,如果分数表示的值大于1,名词用复数;小于1,名词用单数。 <BR> 1 1/2 hours 一个半小时(读作 one and a half hours) <BR> 2 3/4 meters 二又四分之三米(读作two and three-fourths meters) <BR> 4/5 meter 五分之四米 <BR> 5/6 inch 六分之五英寸 <BR><BR> 3. 表示“n次方”的说法:指数用序数词,底数用基数词。 <BR> 10的7次方 the seventh power of ten(ten to the seventh power) <BR> 6的10次方 the tenth power of six(six to the tenth power) <BR><BR> 三 、小数表示法 <BR> 1. 小数用基数词来表示,以小数点为界,小数点左首的数字为一个单位,表示整数,数字合起来读;小数点右首的数字为一个单位,表示小数,数字分开来读;小数点读作 point,o读作 zero或o[ou],整数部分为零时,可以省略不读。 <BR> 0.4 zero point four或point four 零点四 <BR> 10.23 ten point two three 十点二三 <BR> 25.67 twenty-five point six seven 二十五点六七 <BR> l.03 one point o three 一点零三 <BR><BR> 2. 当数字值大于1时,小数后面的名词用复数,数字值小于1时,小数后面的名词用单数。 <BR> 1.03 meters 一点零三米 0.49 ton 零点四九吨 <BR> l.5 tons 一点五吨 <BR><BR> 四、百分数表示法 <BR> 百分数用基数+percent表示 <BR> 50% fifty percent 百分之五十 <BR> 3% three percent 百分之三 <BR> 0.12% zero point one two percent 百分之零点一二 <BR> 这里的percent前半部per表示“每一”,cent这一后半部分表示“百”,所以百分之几中percent不用复数形式。 <BR><BR> 五、数量表示法 <BR> 1. 表示长、宽、高、面积等,用基数词+单位词(meter,foot,inch,kilogram等)+ 形容词(long,wide,high等)表示,或者用基数词+单位词 + in + 名词(length, width, height, weight等)表示。 <BR> two meters long或 two meters in length 2米长 <BR> three feet high或 three feet in height 3英尺高 <BR> four inches wide或 four inches in width 4英寸宽 <BR> This box is 2 kilograms in weight. <BR> 这个盒子有两千克重。 <BR> The city wall of Xian is 12 meters wide and 12 meters high. <BR> 西安城墙是12米宽,12米高。 <BR><BR> 2. 表示时间、距离时,使用含数词的名词所有格形式作定语。 <BR> five minutes walk <BR> 步行五分钟(的距离) <BR> Its an hours ride from my hometown to our university. <BR> 从我的家乡到我们大学是乘车一小时的路程。 <BR> 或:从我的家乡到我们大学需要乘车一小时。 <BR> Its three kilometers distance from our campus to the Bell Tower. <BR> 从我们校园到钟楼有三公里远。 <BR><BR> 3. 表示温度时,用below zero表示零下温度,温度用基数词+degree(s)+单位词(centigrade摄氏或Fahrenheit华氏)表示。 <BR> thirty-six degrees centigrade或 36℃ 摄氏 36度 <BR> four degrees below zero centigrade或 -4℃ 摄氏零下4度 <BR> Water freezes at thirty-two degrees Fahrenheit. <BR> 水在华氏三十二度时结冰。 <BR> Water boils at one hundred degrees centigrade. <BR> 水在摄氏一百度时沸腾。 <BR> 这里的单位词在人们都很清楚是什么度量制度时,可以省略。 <BR> You are 37℃.(读作 thirty-seven degrees) <BR> 你是三十七度。(摄氏) <BR> Its seven degrees below zero. <BR> 今天是零下七度。(摄氏) <BR><BR> 4. 由数词和其他名词构成的名词性短语作定语时,其中的名词用单数形式,名词性短语中各部分间要用连字符“-”来连接。 <BR> Its a five-minute walk from the library to the playground. <BR> 从图书馆到操场需要走五分钟。 <BR> Shes a sixteen-year-old girl. <BR> 她是个十六岁的女孩。 <BR><BR> 5. 表示“比···大(或)几倍”的说法。 <BR> This room is two times bigger than that one. <BR> 这个房间比那个(房间)大两倍。 <BR> The dictionary is four times thicker than that book. <BR> 这本词典比那本书厚四倍。 <BR> My age is two times older than his. <BR> 我的年龄比他大两倍。 <BR>
页:
[1]