The Rules of Changing Cardinal Numbers into Ordinal Numbers

1. The Rules of Changing Cardinal Numbers into Ordinal Numbers 南山实验学校南头小学 段群

2. ﹡An oral game of brain storm. Say them clearly and quickly. • 1 one 6 six 11 eleven 20 twenty • 2 two 7 seven 12 twelve 30 thirty • 3 three 8 eight 13 thirteen 41 forty-one • 4 four 9 nine 15 fifteen 99 ninety-nine • 5 five 10 ten 19 nineteen 100 one hundred

3. ﹡ Let’s say out the following ordinal numbers together. 第一 first second 第三 third 第二 fourth 第五 fifth 第六 sixth 第四 第八 eighth 第九 ninth 第七 seventh eleventh 第十二 twelfth 第十一 第十 tenth 第十五 fifteenth 第十九 nineteenth 第十三 thirteenth 第二十 twentieth 第三十 thirtieth 第四十一 forty-first 第九十九 ninety-ninth 第一百 one hundredth

4. Please compare the ordinal numbers with the cardinal numbers. Let’s find out the rules. Ordinal numbers——Cardinal numbers one→first six→sixth eleven→eleventh twenty→twentieth two→second seven→seventh twelve→twelfth thirty→thirtieth three→third eight→eighth thirteen→thirteenth forty-one→forty-first four→fourth nine→ninth fifteen→fifteenth ninety-nine→ninety-ninth five→fifth ten→tenth nineteen→nineteenth one hundred→one hundredth

5. ﹡ Let’s sum up the rules of changing and creat a chant. A chant 基变序，有规律， 词尾加上th. 一、二、三，特殊记，first, second and third. 八减t, 九减e, ve要用f 替, th紧跟要牢记。 若是ty作结尾，ty变成tie, th千万别忘记。 要是碰到几十几，只变个位就可以。

6. Let’s do exercises!

7. Ⅰ. Let’s practice speaking Our Birthday Train My grandpa is the first. His birthday is on… My grandma is the ... Her birthday is on… My mother is the third. Her birthday is on… My father is the ... His birthday is on… I’m the fifth. My birthday is on…

8. Ⅱ.Can you find the mistakes? Please find them out and correct them. (你能发现下列句中的错误吗？请找出并订正在后面的横线上。) ( ) 1. What’s the date today? It’s Augusttwelve. _____ A B C ( ) 2. My grandma is seventiethyears old. _____ A B C ( ) 3. Today is my ninethbirthday. _____ A B C ( ) 4. Where do you live? I live on the twenty-two floor. _____ A B C ( ) 5. When do you go to bed? I go to bed at nine forty- fifth. _____ A B C

9. Thank you!