高三英語復習數(shù)詞教3

1、語法復習專題（6）unit6 數(shù) 詞'一、考點聚焦1、序號表示法（1）單純的序號，可在基數(shù)詞前加number,簡寫為no.。如：no.1第一號（2）事物名詞的序號表達法有什所不同：對于一些小序號可有序數(shù)詞也可用基數(shù)詞表達，形式分別為：the +序數(shù)詞 + 名詞；名詞 + 基數(shù)詞。如：第一次世界大戰(zhàn)可以表示為the first world war或world war one。對于一些大序號我們通常只用一種表達法，即名詞 + 數(shù)詞。如：501號房間表示為room 501, 538路公共汽車表示為bus 538。可用a / the + number + 基數(shù)詞 + 名詞。如：a no.5 b

2、us一輛五路公共汽車，the no.8 bus那輛8路公共汽車。2、倍數(shù)的表達方式一般情況下我們用以下三種倍數(shù)表達方式：（1）倍數(shù)用在as + 形容詞 / 副詞（原級）+ as結構之前。如：they have three times as many cows as we do.（2）倍數(shù)放在形容詞或副詞的比較級之前或by + 倍數(shù)用在比較級之后。如：this rope is four times longer than that one.they produced more products in 2001 than those in 2000 by twice.（3）倍數(shù)用在表示度量名詞前，

3、其基本結構為：倍數(shù) + the + size / length / weight + of + 表示比較對象的名詞，也可用于倍數(shù) + what引導的從句中。如：this room is three times the size of that one.the college is twice what it was 5 years age.you cant imagine that rats eat 40 to 50 times their weight.3、大約數(shù)的表示方法（1）用ten、dozen、score、hundred、thousand、million等數(shù)詞的復數(shù)后加of短語來表示幾

4、十、幾百、上千、成千上萬等大約數(shù)概念。如：the little boy buys dozens of pencils every term.thousands of people died in the earthquake.every year tens of thousands of people go to work in guangdong province.（2）用、less than、under、below、almost、nearly、up to 等來表示小于或接近某數(shù)目。如：he is good at english, so he can finish the paper in

5、less than two hours.（3）用more than、over、above、beyond、or more等來表示超過或多于某個數(shù)目。如：peking university has a history of more than 100 years.（4）用or、or so、about、around、some、more or less等表示在某一數(shù)目左右。如：about 50 people were present at that time.（5）用to、from to、between and表示介于兩數(shù)詞。如：his salary rises from 20 dollars a w

6、eek to 35 dollars a week.（6）注意事項：dozen、score、hundred、thousand、million作數(shù)詞表示確切數(shù)量時，不用復數(shù)。如：three score, five dozen, seven million等。4、分數(shù)的表達方式（1）分子用基數(shù)詞，分母用序數(shù)詞，分子大于1時，分母用復數(shù)。如：one-third三分之一，three-sevenths七分之三。（2）分子與分母之間加in, 分子在前，分母在后，分子分母都用基數(shù)詞。如：one in ten 十分之一，five in eight八分之五。（3）分子與分母之間加out of , 分子在前，分母在

7、后，分子分母都用基數(shù)詞。如：one out of ten十分之一，five out of eight八分之五。5、百分數(shù)的表示法（1）表示百分數(shù)直接將數(shù)詞放在單詞percent前面即可，如：twenty percent百分之二十。（2）分數(shù)和百分數(shù)后面不能直接接名詞或代詞，而用以下形式：分數(shù)/百分數(shù) of + 冠詞 / 限定詞 + 名詞 / 代詞 ，其謂語動詞與of后的名詞在人稱和數(shù)上保持一致，如：two-thirds of the money was spent on food.about seventy percent of the earth surface is covered by

8、water.6、小數(shù)的表示法小數(shù)的表示法，小數(shù)點前的總值發(fā)同其他數(shù)詞一樣，小數(shù)點用point,小數(shù)點后面的數(shù)讀成個位數(shù)，如：9.65表示為nine point six five。218.39表示為two hundred and eighteen point three nine。>二、精典名題導解選擇填空1. _ people in the world are sending information by e-mail every day.(2001年上海春季高考卷)a.several million b.many millionsc.several millions d.many mi

9、llion解析：答案為a。本題考查的是million表示確切數(shù)量的用法。million前需用數(shù)表確切數(shù)量，而不用many這類詞，但可說many millions of（上百萬的），故本題中用several million。2. the number of people invited _ fifty, but a number of them _ absent for different reasons.(nmet 96)a.were ; was b.was ; was c.was ; were d.were ; were解析：答案為c。本題考查的是the number of + 名詞與a number of + 名詞作主語時謂語的單復數(shù)問題。the number of是“的數(shù)目”，作主語時謂語動詞用單數(shù)，而a number of 后接可數(shù)名詞的復數(shù)形式，作主語時謂語動詞用復數(shù)形式，故此題最佳選項為c。3. shortly after the accident, two _ police were sent to the s