Unit 1 Topic 3 The world has changed for the better Teaching Aimsa. Words and expressionsas a matter of fact, discover, direct, possible, fair, invention, excitein need, medical, treatment, provide, conversation, secretary, engineer, fisherman, dead, army, wound, granddaughter, grandchild, ache, fire, stairs, downstairs, boardb. Patterns:. Oh, you will get used to it very soon if you come. You must come for a visit. Once they find people in need, they decide on suitable ways to help them. The program also provides them with nice houses.You have been in New York for a long time.The city has improved a lot since I came here a few years ago.Bobby left the park two hours ago/at 8:00.Bobby has been away from the park since 8:00/for two hours.c. Grammar: Learn the present perfect tense with “for” or “since”:Teaching focus: Go on learning the present perfect tense with “for” or “since” and find the differences between the present perfect tense and the simple past tense:About the time； This topic needs 5 periods. 总第11课时 Topic 3 The world has changed for the better.Section ATeaching aims and demands 1. Learn some new words and phrases:as a matter of fact, discover, direct, possible, fair, invention, excite2. Learn some useful sentences: (1)Oh, you will get used to it very soon if you come. (2)You must come for a visit.3. Learn the present perfect tense with “for” or “since”:(1)You have been in New York for a long time. (2)The city has improved a lot since I came here a few years agoTeaching focus: Learn the present perfect tense with “for” or “since”: Teaching procedure:Step 1 Review T:S1, have you ever been to Beijing? S1:No, I havent. I have never been there. T:What about your elder brother? I heard he had been there. S1:Yes, he has just come back. T:How long has he stayed there? S1:For about two weeks.Step 2 Presentation Listen to the tape, find out the sentences with “for, since” T: Now, who can answer the question: How was New Yorks traffic? S1: The traffic was terrible and almost everyone drove too fast. T: Youre right. What about its streets in the past? S2: The streets were dirty. T: Does it change now? S2: Yes. It is quite clean now. T: Is New York a dangerous place now? S3: No, it isnt. It was dangerous in the past. T: Well done. Your answers are excellent. If you want to know more about New York, you must come for a visit there. Do you want to go there? Ss:Yes. Of course. T: I hope you have chances. Now lets read after the tape.He has stayed there for about two weeks.You have been in New York for a long time.Great changes have already taken place since 1984.The city has improved a lot since I came here a few years ago.for+时间段since+时间点/从句Step 3 Consolidation Read1a，complete 1b， Step 4 Practice 派生构词(1)否定前缀：un-, im-, dis-, in-等。happy-unhappy, polite-impolite, agree-disagree, direct-indirect(2)re-前缀表示“重复”。write-rewrite(3)动词+-er表示“人”。read-reader, write-writer(4)动词+-ion/-ment/-ness变成名词。act-action, treat-treatment, ill-illness(5)名+-y变成形容词。cloud-cloudy, sun-sunny(6)名词/动词+-ful变成形容词。care-careful, hope-hopeful(7)形容词+-ly变成副词。sad-sadly, strong-strongly3. Guess and master these words. coverdiscover directindirect possibleimpossibleexciteexciting fairunfair inventinvention useusefuluselessreuse writewriterrewritewriting 1. T: If you are interested in it, lets have a discussion and try to make the words, such as: like and dislike, comfortable and uncomfortable.obeyablehopecleverbeautywriteagreehumorfogdangerfriendlyrecentillhealthcomfortablelucktelllikepossiblevisit politesuccesssuggestusesnowwestwinyournoisepeacerapidhappydeveloplaborbuildhomeexcitechangebrighttwentycarecollectcrowdenjoyT: Finish these derivations. You can do them in groups.Homework:Make sentences with “for” or “since”Design The world has changed for the better.Section Aas a matter of factYou have been in New York for a long time.The city has improved a lot since I came here a few years ago.Derivations:in+directindirectim+possibleimpossibledis+coverdiscoverinvent+tioninventionThoughts after class第12课时 Topic 3 The world has changed for the better.Section BTeaching aims and demands 1. Learn some new words and phrases:in need, medical, treatment, provide, conversation, secretary, engineer, fisherman, dead, army, wound, granddaughter, grandchild, ache, fire, stairs, downstairs, board2. Learn some useful sentences: (1)Once they find people in need, they decide on suitable ways to help them. (2)The program also provides them with nice houses.3. Learn the present perfect tense with “for” or “since”:(1)You have been in