Unit 4

1. Unit 4 The world of numbers

2. Listen and watch

3. Imperative sentences Be quite. Please have a seat. Sun Fei, pay attention. Don’t be afraid. Please do not shout. ChenYu, don’t be late. We use imperative sentences to tell people do or not do something. We often make instructions more polite by starting with please.

4. 祈使句( imperative sentences )一般以动词的原形开头，表示命令，要求，请求或劝告等。要表示委婉语气时用please。动词祈使式与动词原形形式相同，但没有时态和复数的词形变化。祈使句一般用降调。 1.肯定结构及强调形式。 • Be a good student. • Please come in. 2. 否定结构。 • Don’t do that again. • Don’t come in, please.

5. 把下列句子变成否定句： • Have a seat, please. • 2. Be quiet. • 3. Open the door, please. • 4. Help yourself to some fish. Don’t have a seat, please. Don’t be quiet. Don’t open the door, please. Don’t help yourself to some fish.

6. Complete the sentence with imperatives and the proper form of the verbs in brackets. • – It is her birthday next week. • -- Then ____________ (not tell) her about the surprise • party. Don’t tell 2. – How can I get to People’s hospital? -- _______ (go) along the street and _______ (turn) left at the lights. go turn 3. – We have to finish the work in two hours. -- Then let’s ______________ (not waste) any time. not waste 4. -- ___________ (not make) so much noise, please. -- OK. Don’t make Look 5. -- _______ (look) out ! There is a car coming. -- Thanks.

7. Listen and watch

8. Reading Numbers: everyone’s language Match the words with the signs and numbers. a percentage e 25% multiply, times h X divide c ÷ a + add, plus f 7 an odd number b 12 an even number g - subtract, minus equals d =

9. Number revision 加法的表达：1.A加B： 2.A加B =…： Add A and B. A plus B equals/ is… e.g. 3+9 = 12: Add 3 and 9 is 12. 3 plus 9 equals 12. 减法的表达: 1. B减A: 2. B减A= Subtract A from B B minus A equals… e.g. 9-3=6 Subtract 3 from 9 is 6 9 minus 3 equals 6.

10. 乘法的表达：1.A乘B： 2.A乘B =…： Multiply A by B. A times B equals/is… e.g. 7x5= 35: Multiply 7 by B is 35. 7 times 5 equals 35. 除法的表达：1.A除以B： 2.A除以B =…： Divide A by B. A divide by B equals/is… Divide 6 by 2 is 3. 6 divided by 2 equals 3. e.g. 6÷2= 3:

11. Instructions and statements about numbers Add S1 1. _______ 11 _____ 1 2. S_______ 5 _______ 13 3. M________ 7 ________ 8 4. D________ 16 ________ 4 5. A ________ 9 __________ 6 6. A__________ 14 and 4 and d_________the answer by 2. 7. S___________ 9 from19 and m________the answer by 3 and ubtract from by ulpitiply ivide by dd and subtract ivide ubtract ultiply

12. equals 12 plus S2 1. 11 _______ 1 _______ ________ 2. ____ m ______ ______ e ____ _____ 3. _____ t ____ _____ e ______ ________ 4. ______ d ____ by _____ e _______ ____ 5. ______ p _____ ____ e_____ _____ 6. _____ p _____ _____ and then d____ by ____ e ____ ______. 7. ______ m _____ ____ and then t ____ ____ e ____ ______. 5 quals inus 8 13 7 imes 8 quals 56 4 16 ivided 4 quals quals 9 lus 6 15 lus 4 ivided 14 2 quals 9 imes 19 9 inus 3 30 quals

13. Listen to a song and revise the numbers

14. 数 词 基数词 数量 序数词 顺序

15. 一 基数词 (1) 1—12 独立成词. one two three four five six seven eight nine ten eleven twelve

16. There are six lions.

17. There are nine girls.

18. There are twelve men.

19. (2) 13—19 -teen结尾 13--thirteen 14--fourteen 15--fifteen 18--eighteen 19--nineteen

20. Work in pairs How old are you? I am… What is ten and eight? It’s eighteen seven six three nine five twelve

21. (3) 表示“十”的基数词20—90 --ty结尾. 20—twenty 30---thirty 40—forty 50—fifty 90—ninety

22. test Try your best ! speak loudly and quickly!

23. 14 90 40 16 50 17 18 15 19 70 80 60

24. (4) 21—99 twenty-one 21 twenty-two 22 33 thirty-three forty-four 44 55 fifty-five ninety-nine 99

25. (5) 101—999 101– one hundred and one eight hundred and forty 840 six hundred and ninety-three 693 301 three hundred and one

26. (6) thousand 7,000 --- seven thousand 16,000 sixteen thousand 80,000 eighty thousand 50,000 3,000 140,000

27. 小知识 （1）年份的表达法（要用基数词，每两位一读。） 1999—nineteen ninety-nine eighteen seventy-five 1875-- two thousand and seven 2007-- two thousand and eight 2008-- 1768 2005 sixteen eighty-two nineteen seventy-four

28. （2）时刻的表达法：(用基数词表示）8:35—eight thirty-five 6:20-- six twenty 7:05-- seven five 10:16-- ten sixteen 11:30-- eleven thirty twelve forty-eight 12:48--

29. practise ---When were you born? ---I was born in 1982 ---When do you usually get up /have lunch/have supper? ---I usually get up at 7:00

30. 二 序数词 基变序有规律，词尾加上“－th”． “一，二，三”，特殊记，面目全非要注意。 八去t，九减e，遇到y变-ie. 若是-ve来结尾，变成f 莫迟疑。 “五，八，十二”和第九，拼写变化要注意。 序数表示“第几十几”，“个位”变序就可以。 序数词缩写记清楚，数字后跟两字母。

31. one first six sixth seven seventh two second eighth eight three third nine ninth four fourth tenth ten five fifth

32. twelve twelfth twenty twentieth forty fortieth twenty-one twenty-first thirty-two thirty-second one hundred and ninety-eight one hundre and ninety-eighth

33. 序数词缩写形式 1st first 2nd second third 3rd 4th fourth 23rd twenty-third 88th eithty-eighth

34. 小知识 日期的表达法： （月+日的序数词） 10月5日—October fifth/5th (October the fifth / the fifth of October) July twentieth/20th 7月20号-- (July the twentieth/ the twentieth of July) 1月1号 2月5号 8月22号 12月23号 January twelfth/12th,2007

35. 二 过关训练 • 单项选择。 • 1.Monday is__ ___day of the week. • A. two B. second C. the second D. the first • 2. I think the___ _ lesson is very easy to learn. • eleven B. eleventh C. eleventh of C B • 3. This is my _______English teacher. • first B. the first C. first of • 4. –What is the date today? • _ _______________. • It is Friday B. It is the fifth day C.It is March fifth • 5.Plaese turn to Page _______ and look at the _______picture. • A. Thirty; second B. Thirty; two C. Thirtieth; second A C A