1、 Unit 4 Asking for Permission基數(shù)詞和序數(shù)詞基數(shù)詞和序數(shù)詞Exercise AExercise BIV. Language FocusAdditional Exerciseanguage FocusL Unit 4 Asking for Permission基數(shù)詞和序數(shù)詞基數(shù)詞和序數(shù)詞 (Cardinal and Ordinal Numbers)IV. Language Focus英語中的數(shù)詞分為兩類：表示數(shù)目的基數(shù)詞和表示順序的序數(shù)詞。一般在基數(shù)詞詞尾加-th即構成序數(shù)詞，但有部分序數(shù)詞有特殊變化，如：first (1st)、second (2nd)、third

2、(3rd)、twelfth (12th)等等。英語中hundred（百）、thousand（千）等用作計數(shù)單位時不用復數(shù)形式，如：three hundred students, two thousand old people；但當它們用來表示不定數(shù)量時，要用復數(shù)形式，如：hundreds of books, thousands of people等。基數(shù)詞的寫法基數(shù)詞的寫法 1. 2199 的兩位數(shù)，十位與個位之間用連字符“-”。例： 21 twenty-one 32 thirty-two Unit 4 Asking for PermissionIV. Language Focus基數(shù)詞和序數(shù)

3、詞基數(shù)詞和序數(shù)詞 (Cardinal and Ordinal Numbers)98 ninety-eight99 ninety-nine 2. 101999的三位數(shù)，百位數(shù)和后面的數(shù)之間用連詞and，百、千等數(shù)詞一律用單數(shù)形式。例：101 one hundred and one225 two hundred and twenty-five999 nine hundred and ninety-nine3. 1000以上的數(shù)，從后面向前數(shù)，每三位中間點“,”，第一個“,”前為thousand，第二個“,”前為 million，第三個“,”前為billion。例：2, 567 two thousa

4、nd five hundred and sixty-seven 3, 018 three thousand and eighteen Unit 4 Asking for PermissionIV. Language Focus基數(shù)詞和序數(shù)詞基數(shù)詞和序數(shù)詞 (Cardinal and Ordinal Numbers)序數(shù)詞的構成序數(shù)詞的構成 1. 一般來說，是由相應的基數(shù)詞加詞尾th構成。例： four + th fourthsix + th sixth ten + th tenth 2. 下面這些基數(shù)詞在變?yōu)樾驍?shù)詞時，有特殊的變化。例：one firsttwo secondthree thir

5、dfive fifth eight eighth Unit 4 Asking for PermissionIV. Language Focus基數(shù)詞和序數(shù)詞基數(shù)詞和序數(shù)詞 (Cardinal and Ordinal Numbers)nine ninth twelve twelfth 3. 十位整數(shù)序數(shù)詞的構成方法是將基數(shù)詞的詞y變成i，然后再加eth。例： twenty twentieth thirty thirtieth ninety ninetieth 4. 兩位或兩位以上的基數(shù)詞變成序數(shù)詞時，僅將個位數(shù)變成序數(shù)詞。例： twenty-one twenty-first thirty-fiv

6、e thirty-fifth a hundred and fifty-three a hundred and fifty-third Unit 4 Asking for PermissionIV. Language FocusA. Read the cardinal numbers. Then write the ordinal numbers next to them.基數(shù)詞基數(shù)詞序數(shù)詞序數(shù)詞onetwothreefiveninetwelvefirstsecondthirdfifthninthtwelfth Unit 4 Asking for PermissionIV. Language F

7、ocusA. Read the cardinal numbers. Then write the ordinal numbers next to them.基數(shù)詞基數(shù)詞序數(shù)詞序數(shù)詞twentytwenty oneone hundredtwentiethtwenty firstOne hundredth Unit 4 Asking for PermissionIV. Language FocusB. Fill in the blanks with the given numbers or words. Use the correct form.1. My office is on the _ (

8、8) floor.2. The dress costs _ (189) yuan.3. _ (thousand) of people come to the building every day.eighthone hundred and eighty-nineThousands Unit 4 Asking for PermissionIV. Language FocusB. Fill in the blanks with the given numbers or words. Use the correct form.4. Joseph is _ (12) years old.5. Rose

9、 celebrated her _ (21) birthday last year.twelvetwenty-first Unit 4 Asking for PermissionIV. Language FocusMultiple choice. Choose the best answer for each blank.1. Please turn to _.A. Page 11 B. the 11st page C. page 11 D. page the 11th 2. At night we can see _ stars in the sky. A. thousands and th

10、ousands of B. thousand and thousands of C. a thousand and thousands D. thousand and thousand Unit 4 Asking for PermissionIV. Language FocusMultiple choice. Choose the best answer for each blank.3. There are some _ in our classroom. A. hundred of books B. the hundreds of books C. hundreds of books D.

11、 hundred of book 4. I have been to the village _. A. a hundred time B. hundred times C. hundreds of times D. hundred of times Unit 4 Asking for PermissionIV. Language Focus5. There are _ students in our school. A. four-hundred and forty-five B. four hundred and forty-five C. four hundreds and forty-

12、five D. four hundred and forty five 6. The teacher told me to go over _ lessons. A. thirst three B. the three first C. three the first D. the first three Multiple choice. Choose the best answer for each blank. Unit 4 Asking for PermissionIV. Language Focus7. May is _ of a year. A. the fifth months B

13、. the fifth month C. the five months D. the five month 8. We live in _. A. the twenty-first century B. the century twenty-one C. century twenty-one D. the century twenty-first Multiple choice. Choose the best answer for each blank. Unit 4 Asking for Permission9. He said he was going to be free in _.

14、 A. one and a half hour B. one hour and half C. one and half hours D. an hour and a half10. How many English books are there on the table? There is only _ English book on it. A. a B. an C. one D. the IV. Language FocusMultiple choice. Choose the best answer for each blank. Unit 4 Asking for Permissi

15、on11. Mr Smith stayed in _ last night. A. Room 403 B. the Room 403 C. the 403 room D. 403 the room 12. The road is _. A. two thousand and five hundred metres long B. two thousands metres long C. long one thousand five hundred metre D. a thousand and five hundreds metres long IV. Language FocusMultiple choice. Choose the best answer for each blank. Unit 4 Asking for Permission13. He joined the army on _ of May 1980. A. 1st B. the 1 C. first D. the first 14. Is Sunday the _ day of the week? A. a B. one C. once D.