时间:2018-12-18 作者:英语课 分类:大学四六级阅读


英语课

   数词


  表示数目多少或顺序多少的词叫数词,数词分为基数词和序数词。表示数目多少的数词叫基数词;表示顺序的数词叫序数词。
  一、基数词
  1)基数词写法和读法: 345 three hundred and forty-five;
  2)基数词一般是单数形式,但下列情况,常用复数:
  a. 与of 短语连用,表示概数,不能与具体数目连 用,如scores of people 指许多人;
  b. 在一些表示"一排"或"一组"的词组里;
  如:They arrived in twos and threes. 他们三三两两的到达了。
  c. 表示"几十岁";考试大,考试伴你同行
  d. 表示"年代",用 in +the +数词复数;
  e. 在乘法运算的一种表示法里,如:3 x 5 = 15 Three fives is (are) fifteen.
  二、序数词
  序数词的缩写形式: first---1st second---2nd thirty-first---31st
  三、 数词的用法
  1)倍数表示法
  a. 主语+谓语+倍数(或分数)+ as + adj. + as
  I have three times as many as you. 我有你三倍那么多。
  b. 主语+谓语+倍数(分数)+ the size (amount,length…) of…
  The earth is 49 times the size of the moon. 地球是月球的49倍。
  c. 主语+谓语+倍数(分数)+ 形容词(副词)比较级+ than…
  The grain output 1 is 8 percent higher this year than that of last year.
  今年比去年粮食产量增加8%。
  d. 还可以用by+倍数,表示增加多少倍
  The production of grain has been increased by four times this year.
  今年粮食产量增加了4倍。
  2)分数表示法
  构成:基数词代表分子,序数词代表分母。分子大于1时,分子的序数词用单数,分母序数词用复数:
  1/3 one-third ; 3/37 three and three-sevenths.

1 output
n.产量,输出,输出功率,输出端;vt.输出(信息等)
  • Grain output reached a new high in the three years.谷物产量达到三年中最高水平。
  • The chart showed us the global output of a factory.这张图表展示了一个工厂的总产量。
标签: 英语六级
学英语单词
airport location
angusta
antunez
automatic question modification
bandi-ye kuh
be turned on
beam propagation
bicomponent-finre yarn
Blessed Virgin Mary
brain waver
canopy manual release handle
cardiac diet
centre line survey
chlorobiphenylmethyl
classification of the branches
cliack
color effect
compression coupling
congolite
corvin
d'almeida
diathermia
discubation
drag over the coals
duplicate volume
e arm
echolucent(sonolucent)
efficiency characteristic of steering gear
ethyl maltol
extra-atmospheric space
filipovic
flash back to
fritting
g.p
gallwey
geum virginianums
gloria cloth
harijan
haute coutures
high energy fluid system
idaltim
intermediate switching region
isothiocyanic acid amyl ester
keyed bugle
Kim Bang
lattice polynomial
lean and mean
leased locomotive
lespenephryl
lightning-diverting cable
mertinet
metal goods
metallic thermocouple
Miya-gawa
morbidly obese
multinomial distributions
n-methyl-para-aminophenol
neutral bus-bar
offset, segment
particular surroundings
peeweep
performance-relateds
permeability for liquid
pipe hange
playing period
potshot
preform
quick acting coupling
quo minus
razor-bill
Riemann sum
rot test
sabratha
salt edema
saltwater crocodile
scarmoges
schizanhenol
sediment vein
sheath of Key and Retzius
sideblade
single tooth X-ray apparatus
statement function defining statement
stephanotis floribundas
strangerly
subsidiary organ
sugar cane car
synthetic(al)
textology
trevose
trinary stars
turnip tops
us governments
vile
Von Frank Mountain
Wepener
wet classifier
wichstrom
wide-aperture
wideband aerial
wifty
wingfishes
YHT