一、倍数表达法 首先要明白,6 是 2 的 3 倍,6 比 2 大(6-2)÷2=2 倍 比如:A A 比 B B 快两倍就是 A A 是 B B 的三倍快 倍数表达法有 3 种: twicetwice 或 three,four,three,four, five...+timesfive...+times as+as+形容词原级+as+as thethe+ +对应名词+ +ofof twicetwice 或 three,four,three,four, five...+timesfive...+times 形容词比较级+than+than 注意:倍数要减一 只有了解到这个“公式”的形成过程才不会糊涂! 这栋楼和那栋楼一样高 ThisThis buildingbuilding isis asas highhigh asas thatthat one.one. 这栋楼是那栋楼的三倍高 (两倍更高) ThisThis buildingbuilding isis threethree timestimes asas highhigh asas thatthat one.one. ThisThis buildingbuilding isis threethree timestimes thethe heightheight ofof thatthat one.one. (即“这栋楼是那栋楼的高度的三倍。
” ) ThisThis buildingbuilding isis twicetwice higherhigher thanthan thatthat onone. 常用相关名词:比大小用 sizesize;比重量用 weightweight;比高度用 heightheight;比宽度 用 widthwidth;比速度用 speedspeed 二、AdditionAddition(加法)以 2+5=7 为例,可以有如下说法: TwoTwo plusplus fivefive equals/isequals/is seven.seven. AddAdd twotwo toto five,five, andand you’llyou’ll getget seven.seven.(additionaddition 是 addadd 的名词形式) IfIf youyou addadd twotwo toto five,five, you’llyou’ll getget seven.seven.(条件状语从句,新概念 137) 三、SubtractionSubtraction(减法)以 8-5=3 为例,可以有如下说法: EightEight minusminus fivefive equals/isequals/is three.three. SubtractSubtract fivefive fromfrom eight,eight, andand you’llyou’ll getget three.three. 提示:subtractsubtract 是动词(subtractionsubtraction 是它的名词形式) ,有“扣除、减去”的 意思,所以 subtractsubtract fivefive fromfrom eighteight 就是“从 8 中减去 5”的意思。
IfIf youyou subtractsubtract fivefive fromfrom eight,eight, you’llyou’ll getget three.three.(见新概念 137 课) 四、MultiplicationMultiplication(乘法)以 2×3=6 为例,可以有如下说法: TwoTwo timestimes threethree equals/isequals/is six.six. MultiplyMultiply twotwo byby three,three, andand you’llyou’ll getget six.six. 提示:multiplymultiply 是动词(multiplicationmultiplication 是它的名词形式) ,有“乘以”的意 思,所以 multiplymultiply twotwo byby threethree 就是“用 3 乘以 2”的意思 IfIf youyou multiplymultiply twotwo byby three,three, you’llyou’ll getget six.six.(见新概念 137 课) TwoTwo multipliedmultiplied byby threethree equals/isequals/is six.six.(l 是辅音,去 y 变 i 加 ed) 提示:这个用法和 divideddivided byby 很像,由“过去分词+by+by”构成,字面意思:2 被 3 乘了就等于 6。
其实就是乘法 五、DivisionDivision(除法)以 6÷3=2 为例,可以有如下说法: SixSix divideddivided byby threethree equals/isequals/is two.two. DivideDivide sixsix byby three,three, andand you’llyou’ll getget two.two. 提示:dividedivide 是动词(divisiondivision 是它的名词形式) ,有“除以”的意思,所以 dividedivide sixsix byby threethree 就是“用 3 去除 6”的意思 IfIf youyou dividedivide sixsix byby three,three, you’llyou’ll getget two.two.(见新概念 137 课) 六、辨析 howhow often,often, howhow much,much, howhow manymany times,times, howhow soon,soon, howhow long,long, howhow far,far, howhow fastfast howhow oftenoften 问事情发生的频率,多久一次 howhow muchmuch 问不可数名词的数量,问价格,问计算结果 howhow manymany timestimes 问事情发生多少次,与频率无关 howhow soonsoon 问某事还要多久才能完成,回答用 in+一段时间,将来时 howhow longlong 问某事持续多长时间,回答用 for+一段时间,过去时 howhow farfar 问路程多远 howhow fastfast 问速度多快(给出路程和时间) What’sWhat’s youryour ageage? ? = = HowHow oldold areare you?you?(问年龄) What’sWhat’s thethe priceprice ofof thisthis television?television? = = HowHow muchmuch isis thisthis television?television? = = HowHow muchmuch doesdoes thisthis televisiontelevision cost?cost?(问价格) What’sWhat’s thethe areaarea ofof China?China? = = HowHow bigbig isis China?China?(问面积) What’sWhat’s thethe populationpopulation ofof China?China? = = HowHow manymany peoplepeople areare therethere inin China?China?(问人口) 七、addadd 用法巧记 addadd 3 toto 5 3 加 5 addadd toto = = increaseincrease 增添 AddAdd upup thesethese numbersnumbers andand telltell meme howhow muchmuch theythey addadd upup toto. . 把这些数字全部加起来,然后告诉我它们总计达到多少。