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九年级英语复习数词 人教四年制版

九年级英语复习数词 人教四年制版

. 本周教学内容:复习数词

. 重点、难点:

(一)基数词

1. 基数词的表示方法:

12

1319

2090

1001,000,000,000

one

a / one hundred

two

twenty*

one thousand

three

thirteen*

thirty

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“十千”来表示,而“十万”在英语中用“百千”来表示。如:

hundred百,thousand千,ten thousand万,one / a hundred thousand十万,million百万,one / a billiona / one thousand million)十亿

  4. hundredthousandmillionbillion表示具体数字时,没有复数形式。hundreds ofthousands ofmillions of表示不定数目。如:

hundredsthousandsmillionsof 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

1―第12

13―第19

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

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