Question：我感觉代词讲得差不多了。
Answer：是的。今天我们开始讲数词：基数词和序数词（one , first）
基数词和序数词
Reading:
This happened during the Second World War.
Having sailed for hundreds of days, two men with the name John and Bill were shipwrecked on a deserted island in the middle of the Pacific Ocean.
They had plenty of fish and fruit to eat, but nothing to read except a book full of jokes.
Each of the jokes were numbered.
At first, to help pass the time, John and Bill read the jokes to each other, then they told the story from memory. After a year they knew the jokes so well that they just said the number of the joke.
“Number twenty,” John would say, and Bill would roar with laughter.
Then Bill might say, “The twenty-fifth,” and John would laugh.
One day, after they had been on the island for dozens of years, another man was shipwrecked with them.
They began to tell jokes as usual. Bill said, “Number one hundred and four.” John burst out laughing. The man didn’t laugh. John said, “Number ninety-nine.” Bill began to laugh. The man looked puzzled.
The man said, “ Number two hundred and twenty.” Neither of the other two men laughed.
“Why didn’t you laugh?”
Bill then handed him the joke book, which contained only one hundred and eighty jokes.
数词有基数和序数词：
1. 基数词用来表示事物的数量：
Two men with the name John and Bill were shipwrecked on a deserted island in the middle of the Pacific Ocean.
Bill then handed him the joke book, which contained only one hundred and eighty jokes.
2. 基数词：
(1-10) one two three four five six seven eight nine ten
(11-19) eleven twelve thirteen fourteen fifteen sixteen seventeen eighteen nineteen
(20-90) twenty thirty forty fifty sixty seventy eighty ninety
(21 33...)twenty-one thirty-three...
(100 1,000 1,000,000) a (one) hundred, a (one) thousand, a (one) million,
(1,000,000,000) a (one) billion(美式)， a (one) thousand million(英式)
(1,000,000,000,000) a (one) trillion(美式) ， a (one) billion(英式)
3. 其他基数词的读法：
418 four hundred and eighteen
1,006 one thousand and six
18,999,337 eighteen million nine hundred and ninety-nine thousand three hundred and thirty-seven
读数时 hundred, thousand等均用单数， 百位和十位（如十位为零则在个位）之间加and。
4. 序数词用来表示事物的顺序：
the Second World War, the twenty-fifth
5. 序数词：
(1st-10th) first second third fourth fifth sixth seventh eighth ninth tenth
(11th, 19th ) eleventh, nineteenth
(20th ,90th ) twentieth, ninetieth
(21st 45th 89th )twenty-first forty-fifth eighty-ninth
(100th 1,000th ) hundredth, thousandth,
6. 序数词前通常用定冠词。 用不定冠词时有其特殊意义：
Let me try it a third time. 表示“再， 又”
7. 谈论编号时，也可以这样用基数词表示顺序：
Number twenty.
Number one hundred and four.
Lesson One
Section Twenty-two
小练习：
读出下列数词：
1）234,666 2） 900,763,201 3）33th 4） 48th
上期答案：
1. but she can't find hers. 2. but she can’t find any in her size.
3. but she’s going to buy some 4. she’s looking for some red ones. 5. but hers are big.
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