九年级英语复习数词 人教四年制版
一. 本周教学内容:复习数词
二. 重点、难点:
(一)基数词
1. 基数词的表示方法:
1―2 |
13―19 |
20―90 |
100―1,000,000,000 |
one |
|
|
百a / one hundred |
two |
|
twenty* |
千one thousand |
three |
thirteen* |
thirty |
万ten thousand |
four |
fourteen |
forty* |
十万one hundred thousand |
five |
fifteen* |
fifty |
百万one million |
six |
sixteen |
sixty |
千万ten million |
seven |
seventeen |
seventy |
亿one hundred million |
eight |
eighteen* |
eighty |
十亿one billion(美) |
nine |
nineteen |
ninety |
|
ten |
|
|
|
eleven |
|
|
|
twelve |
|
|
|
2. 20以上的基数词的读法:
(1)两位数的表示法,在十位和个位之间加连字符(即“一”),如:
22读作:twenty-two
(2)三位数的表示方法,在百位之后加“and”。如:
231读作:two hundred and thirty-one
(3)四位数及四位以上数的读法,只在百位之后加and,而千位、万位以上的数后面不加任何词,只按顺序读。如:
1,234读作:one thousand two hundred and thirty-four
5,110,981读作:five million one hundred and ten thousand nine hundred and eighty-one
3. 同汉语一样,英语“百”位数以上的单位是“千”,但“千”位数以上的单位是“百万”。英语中没有“万”这个词,是用“
hundred百,thousand千,ten thousand万,one / a hundred thousand十万,million百万,one / a billion(a / one thousand million)十亿
4. hundred,thousand,million,billion表示具体数字时,没有复数形式。hundreds of,thousands of,millions of表示不定数目。如:
hundreds(thousands,millions)of dollars数百(成千,或百万)美元
thousands and thousands of people成千上万的人
millions of reasons 许许多多的理由
(二)序数词
序数词一览表
第1―第12 |
第13―第19 |
第20―第99 | |||
1st |
first |
13th |
thirteenth |
20th |
twentieth |
2nd |
second |
14th |
fourteenth |
30th |
thirtieth |
3rd |
third |
15th |
fifteenth |
40th |
fortieth |
4th |
fourth |
16th |
sixteenth |
50th |
fiftieth |
5th |
fifth |
17th |
seventeenth |
60th |
sixtieth |
6th |
sixth |
18th |
eighteenth |
70th |
seventieth |
7th |
seventh |
19th |
nineteenth |
80th |
eightieth |
8th |
eighth |
|
|
90th |
ninetieth |
9th |
ninth |
|
|
21st |
twenty-first |
10th |
tenth |
|
|
32nd |
thirty-second |
11th |
eleventh |
|
|
43rd |
forty-third |
12th |
twelfth |
|
|
54th |
fifty-fourth |
|
|
|
|
99th |
ninety-ninth |