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

﹡ 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

﹡ 第一 Let’s say out the following ordinal numbers together. first 第二 second 第三 third 第四 fourth 第五 fifth 第六 sixth 第七 seventh 第八 eighth 第九 ninth 第十 tenth 第十一 eleventh 第十二 twelfth 第十三 thirteenth 第十五 fifteenth 第十九 nineteenth 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

Please compare the ordinal numbers with the cardinal numbers. Let’s find out the rules. 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 Ordinal numbers——Cardinal numbers

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 。 ﹡

Let’s do exercises!

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… Ⅰ. Let’s practice speaking Our Birthday Train

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 August twelve. _____ A B C ( ) 2. My grandma is seventieth years old. _____ A B C ( ) 3. Today is my nineth birthday. _____ 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