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Module 4 A Social Survey- My Neighbourhood GrammarI Studying aims 学习目标To learn and master the usage of the present perfect tense. 学习并掌握现在完成时态的用法II Self-study guides自学指导1. Observe the following sentences and summarize the expression of the present perfect tense.1) I have seen the film many times.2) We havent finished our homework.3) Has he lived here since 1990?总结：现在完成时的表达方式：_; 否定形式_一般疑问句把_或_提前。2. Study the following sentences and summarize the usage of the present perfect tense.1) I have taught English for 19 years.2) He has been at this school since 1988.3) I have lived here since I was born.总结1：现在完成时可以用来表示_;常与_和_ 连用，for 后面接_; since后面接_. 此时谓语动词须为_.1) I have been to that place three times.2) We have already finished our homework.3) The woman has never heard of that before.4) We have learned 2000 words so far.总结2：现在完成时可以用来表示动作发生在_, 强调对现在造成的影响，可译成“已经做过/做过”常与_ 连用。跟踪练习：1）-Oh, your bike is very cool. Is it new? - No, I _ it for two months.A. had B. have had C. bought D. have bought 2) His grandmother _ for over two years.A has died B has been dead C has dead D died 4. Think for a while and write out the sentence patterns which use the present perfect tense in this module. _ Summary :Ask some students to summarize what theyve learned this class. Exercises in class 当堂训练A)选用have, has填空:1. I _ told him the news. 2. She _ come back from school.3. You _ won the game.B)按要求改写下列各句:4. They have bought a computer. (改成否定句)_5. He has lost his book. (先改成一般疑问句,再作肯定与否定回答)_C) 语法填空1My mother is a retired teacher. She _(teach) in a high school in Xiamen for 30 years.2. - Has Sam finished this homework today? - Yes. He _ （do）it this morning.3. This is the third time I _ (visit) Hong Kong. The second time I _(came) here was on Christmas.4. With the help of the technology, more and more new substances _ (discover) in the past years.5 - _ you _ him around the museum yet? (show) - Yes. We had a great time there.6. When _ you _ to Shanghai?(go)7. The number of foreign students attending Chinese universities_ (be)rising steadily since 1990.D) 翻译下列句子。1 .这本字典我已买了三年了。_2.他们已去了美国五年了。_3 你已经看过这部电影了吗？_4. 自从1999年以来他们就认识。_5 我以前从来没去过那个农场。_
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