來源:網絡資源 2022-12-07 13:47:06
數詞分為兩種:基數詞(表示數目)和序數詞(表示順序)。
考點一基數詞的用法
1. 基數詞的基本用法用作基數詞單位的hundred, thousand, million, billion 通常不帶復數詞尾-s,但若用于表示數百、數千、數百萬這樣的泛指,則用復數。
About two thousand people died in the earthquake.
大約有兩千人在地震中喪生。
Thousands of people go to the seaside every year.
每年成千上萬的人到海濱去。
2. 表示年齡和年代的用法表示整十的基數詞用復數形式可以表示人的大概歲數或某個年代。
He is in his early twenties. 他的年紀在二十出頭。
This story took place in the 1930s.
故事發生在20世紀30年代。
考點二序數詞的用法
1.序數詞的構成大多數的序數詞是由基數詞加-th構成,如:seven—seventh, ten—tenth
以-t結尾的基數詞只在詞尾加-h,如:eight—eighth
以-ve結尾的基數詞改-ve為f再加-th,如:five—fifth, twelve—twelfth
以-y結尾的基數詞改-y為-ie再加-th,如:twenty—twentieth, thirty—thirtieth
幾十幾的序數詞只在個位數體現,如:twenty-one—twenty-first,thirty-three—thirty-third
特殊的序數詞:one—first, two—second, three—third, nine—ninth
2. 不定冠詞a與序數詞連用序數詞前加冠詞a表示“再一次”。例如:Can I try a second time? 我可以再試一次嗎?
3. 序數詞用于分數中描述分數時,分子用基數詞,分母用序數詞,分子大于1時,分母加s。例如:1/5:one fifth 2/3:two thirds
考點三倍數的表達法
1.A+be動詞/謂語動詞+倍數+as+形容詞/副詞原級+as+B例句:Women working as housekeepers in the under 35 age group in 2014 were almost twice as many as in 2004.
譯文:2014年35歲以下的女性做保姆的人數幾乎是2004年的兩倍。
2.A+be動詞/謂語動詞+倍數+形容詞/副詞比較級+than+B例句:This building is three times higher than that one.
譯文:這座建筑的高度是那座的四倍。(這座建筑比那座高三倍。)
3.A+be動詞+倍數+the size/height/length/width,etc+of+B例句:This street is four times the length of that one.
譯文:這條街是那條街的四倍長。
4.times as many/much/often/比較級+as+被比對象例句:Young people used the Internet more than three times as often as the general population in 2014.
譯文:在2014年,年輕人上網人數是一般大眾的3倍多。
5.times+that+of+被比對象例句:In this workshop, the output of July was 4.5 times that of January.
譯文:這個車間7月份的產量是1月份的4.5倍。
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