7BU1语法知识数词的归纳

1、数词练习 倍数表达 AUTHOR Zkj Page PAGE 4 of NUMPAGES 4数词常考点以及易错点1、hundred, thousand, million, billion, dozen, score这些词前面如有表示具体数字的词，他们不能加“s”，且不能加 of ; 反之，则需加“s”，与of 连用。three hundred people thousands of people2、表示大几倍或者小多少用基数词。This room is three times bigger than that one.这个房间比那个大三倍。3、表分数时，分子基数词，分母序数词，分子大于一，分母

2、用复数。Two thirds of the books are mine.三分之二的书是我的。One third of the book are mine.三分之一的书是我的。4、与数词有关的介词短语：（1）in the + 数词的复数形式，表示年代。 in the 1870s 在19世纪70年代（2）in + 物主代词+ 数词的复数形式，表示某人的年龄。 in ones thirties 在某人30多岁的时候 有时候在物主代词后面可加上形容词early或late使其含义更确切。注意：“十几岁”要用 “in ones teens”.5、数词前加every, 表达“每一段时间或间隔一段” 每10

3、天、每隔9天 ： every ten days every ninth day 每4周、每隔3周 ： every four weeks every third week6、序数词前要加定冠词the, 但基数词前不加冠词。 She is the first to come to school.她是第一个来到学校的。7、aan + 序数词，表示“又一，再”He failed twice, and he tried it a third time.他失败了两次，又再次尝试了一次。He failed twice, and he had a third try.8、of the +基数词，表示“范围”

4、She is the most beautiful girl of the three.她是三个中最漂亮的一个女孩。9、当序数词为表达名次的名次时，不和定冠词连用。Lily came first in the race.丽丽在比赛总赢得了第一名。10、表示再次，再来一些等。基数词+ more+ 可数复数 another+ 基数词+ 可数单数 other + 基数词+可数复数 倍数表达法A是B的几倍长（宽，高，大，重等）” ：1.“A + be + 倍数 + as + 计量形容词原级 + as + B”。如：This tree is three times as tall as that one

5、. His father is twice as old as he. 2.“A + be + 倍数 + 计量形容词比较级 + than + B ”。如：The dictionary is exactly five times more expensive than that one. 3.“A + be + 倍数 + the + 计量名词 + of + B ”。如：The newly broadened square id four times the size of the previous one. 4.“The + 计量名词 + of + A + be + 倍数 + that + of

6、 + B ”如：The size of the newly broadened square is four times that of the previous one.more than . as . as结构more than倍数词as形容词副词as说明此句型意为“是的几倍还不止”。“两倍”是twice，而三倍以上的“倍”，通常用times。 He is more than three times as rich as I. (=He is three times richer than I.) 他的财富是我的三倍还不止。 He studies more than three times

7、 as hard as I. 他用功的程度是我的三倍还不止。 I am more than twice as old as he. 我的年龄是他的两倍还不止。 He has collected more than three times as many stamps as I (have). 他搜集的邮票是我的三倍还不止。. times .er than .结构倍数词形容词或副词比较级than说明此句型意为“比大几倍”。“两倍”是twice，而三倍以上的“倍”，通常用times。 We now know that X-ray waves are 2,000 to 10,000 times sh

8、orter than light waves. 我们现在知道X光波比光波短二千到一万倍。 This street is four times shorter than that one. 这条街道比那条短四倍。 The mother elephant is one hundred times heavier than the baby elephant. 这只母象比小象重一百倍。 It is ten times louder than another. 它比另外一个的声音大十倍。 This street is three times wider than that one. 这条街比那条街宽三

9、倍。 I am twice older than he. 我的年纪比他大两倍。. times the/my N .结构倍数词the（或所有格）名词说明此句型意为“是的几倍”。与之间一定有 the 或。有时可改为“as”。三倍以上的“倍”，通常用“times”。而“more thanthe（或）”译为“是的几倍还不止”。 It was over twice the distance of the earth from the sun. 那是地球到太阳的距离的两倍多。 Line A is four times the length of line B. 线条 A 是线条 B 的四倍长。 I hav

10、e five times the number of Toms books. 我有五倍于汤姆的书。 He has three times my money. 他的钱是我的三倍。 He has more than three times my money. 他的钱是我的三倍还不止。 The river is ten times the length of the Tamsui River. 这条河的长度是淡水河的十倍。 Holland has two-thirds the inhabitants of the state of New York, which is four times the

11、size of Holland. 荷兰的居民是纽约州的三分之二，而纽约州却是荷兰的四倍大。. times as . as .结构倍数词as形容词副词as说明此句型意为“是的几倍”。“两倍”是 twice，而三倍以上的“倍”，通常用 times。 An ordinary subway train, approaching the station, can be twice as loud as the loudest jet. 平常的地下火车接近车站时，发出的声音可能是最大声的喷射机的两倍。 This line is four times as long as that one. 这条线是那条线

12、的四倍长。 I am twice as old as he. 我的年纪是他的两倍。 She studies three times as hard as I. 她用功的程度是我的三倍。 He earns twice as much as he used to. 他比往常多赚二倍的钱。 She spent half as much money as you. 她花掉的钱只有你花掉的一半。英文倍数表达法巩固练习1. （ 2002） Americans eat _ vegetables per person today as they did in 1910.A. more than twice B

13、. as twice as manyC. twice as many as D. more than twice as many2. （上海） Paper produced every year is _ the worlds production of vehicles.A. the three weight of B. three times the weight ofC. as three times heavy as D. three times as heavier as3. （ 1994 上海） With the help of the German experts， the factory produced _ cars in 1993 as the year before.A. as twice many B. as many twiceC. twice as many D. twice many as4. （ MET 1992 ） This ship measures _ that one.A. as twice as long B. as twice long asC.