2019-2020年高中英語語法專題復習 專題六 數(shù) 詞教案.doc
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2019-2020年高中英語語法專題復習 專題六 數(shù) 詞教案.doc
2019-2020年高中英語語法專題復習 專題六 數(shù) 詞教案一、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??捎胊 / the + number + 基數(shù)詞 + 名詞。如:a No.5 bus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 xx than those in xx by twice.(3)倍數(shù)用在表示度量名詞前,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 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 week 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 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.(xx年上海春季高考卷)A. Several million B. Many millionsC. Several millions D. Many million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 sport to keep order .(NMET 92)A. dozens of B. dozens C. dozen D. dozen of 解析:答案為C。此題考查的是數(shù)詞dozen表示確切數(shù)量時的用法,dozen表示確切數(shù)量時用其單數(shù)形式,當dozens的復數(shù)后接of時則表示不確切數(shù)量,本題答案為C。