1、Unit 3 Learning about LanguagePeriod ThreePeriod ThreeLearning About LanguageLearning About LanguageLearning AimsLearning Aims(学习目标)1.Build up your vocabulary and learn the following 1.Build up your vocabulary and learn the following language pointslanguage points：contributecontribute，before.(before
2、.(重点难点重点难点)2.Discover useful structuresThe past perfect tense&2.Discover useful structuresThe past perfect tense&the past perfect passive voice.(the past perfect passive voice.(重点难点重点难点)Italy，Greece，and Spain are famous for their olives，figs，and other ingredients，which have all contributed to centur
3、ies of cuisine development.(教材P28)contribute vt.&vi.捐献；贡献；捐助；投稿；有助于，促成(1)contribute.to.把贡献给contribute to.导致；向投稿；有助于(2)contribution n.贡献；捐款；稿件make contributions/a contribution to.对做出贡献1 1例句Doing small things well contributes to strengthening our confidence and helping us meet bigger challenges in the
4、 future.If you want to contribute to our newspaper，please send me your article before the deadline.In conclusion，I was proud of making great contributions to spreading Chinese culture.完成句子完成句子吃太多的脂肪导致心脏病并造成高血压。吃太多的脂肪导致心脏病并造成高血压。heart disease and causes high blood pressure.我呼吁每个人为建立低碳社会做贡献。我呼吁每个人为建立低
5、碳社会做贡献。I appeal to everyone to _ .Eating too much fat contributes tomake contributions to building a low-carbonsocietySome traditional Chinese dishes from before the Ming Dynasty are still popular today.(教材P28)before的的用法用法(1)句中句中before为介词，表示为介词，表示“在在以前以前”；before还可用作连词，还可用作连词，引导一个时间状语从句，表示引导一个时间状语从句，
6、表示“在在之前之前”。除此之外，还可。除此之外，还可以表示以表示“(之后之后)才；不久就；不等才；不久就；不等就；以免就；以免”。2 2(2)句型归纳：It wont be.before.用不了多久就会(before从句用一般现在时)It will be.before.得过多久才(before从句用一般现在时)It wasnt.before.没过多久就(before从句用一般过去时)It was.before.过了多久才(before从句用一般过去时)例句If you miss the chance，it will be years before you get another one.Bef
7、ore we participate in the volleyball match，we must make full preparations.Think twice before you decide.完成句子完成句子我们上下节课前，你最好读这本参考书以了解唐诗的历史。我们上下节课前，你最好读这本参考书以了解唐诗的历史。，youd better read the reference book to learn about the history of Tang poetry.你去中国朋友家之前，我必须告知你一些相关的细节。你去中国朋友家之前，我必须告知你一些相关的细节。，I must i
8、nform you of some relevant details.Before we begin our next lessonBefore you go to a Chinese friends home01语法结构语法结构Activity 1读句感悟阅读下列句子，认真感悟阅读下列句子，认真感悟加加颜色颜色部分部分，并完成方框下的小题，并完成方框下的小题1.Prior to coming to China，my only experience with Chinese cooking was in America，with Chinese food that had been chang
9、ed to suit American tastes.2.When my family and I had just arrived in China，we went looking for a good place to eat in Beijing.3.A Sichuan restaurant had been recommended to us by a friend，and finally，we found it.4.Tired，hungry，and not knowing a word of Chinese，we had no idea how to order，so the che
10、f just began filling our table with the best food we had ever eaten.1.以上句子中所用的时态以上句子中所用的时态都是都是 。2.句句2和句和句4中使用的是过去完成时态中使用的是过去完成时态的的 语态语态，其基本结构，其基本结构是是 。3.句句1和句和句3中使用的是过去完成时态中使用的是过去完成时态的的 语态语态，其基本结构，其基本结构是是 。过去完成时过去完成时主动主动hadhad过去分词过去分词被动被动hadhadbeenbeen过去分词过去分词Activity 2Activity 2语法精析1.1.概念：过去完成时表示在过
11、去某一时间或动作之前已经发生概念：过去完成时表示在过去某一时间或动作之前已经发生或完成了的动作，即或完成了的动作，即“过去的过去过去的过去”。2.2.基本结构基本结构 主动语态主动语态被动语态被动语态肯定形式肯定形式had donehad donehad been donehad been done否定形式否定形式had not donehad not donehad not been donehad not been done一般疑问句一般疑问句hadhad主语主语donedonehadhad主语主语been donebeen done特殊疑问句特殊疑问句疑问词疑问词hadhad主语主语do
12、nedone疑问词疑问词hadhad主语主语been been donedone3.基本用法表示在过去某一时间或动作以前完成了的动作，即“过去的过去”。与过去完成时连用的时间状语常有：by过去的时间点；by the end of过去的时间点；before过去的时间点；还可以通过上下文来暗示。I had finished reading the novel by nine oclock last night.到昨天晚上九点，我已经读完了那本小说。More than three thousand English words had been learned by the end of last t
13、erm.到上学期末已经学习了三千多个英语单词了。More than six hundred trees had been planted before last Wednesday.在上周三前已经种了600多棵树了。They became homeless again，for their house had been destroyed in the earthquake.他们又一次无家可归了，因为他们的房子在地震中被毁掉了。I had been at the bus stop for 20 minutes when a bus finally came.当车来的时候，我在车站已经等了20分钟
14、。The boy was reminded that his homework had not been handed in.这个小男孩被提醒还未交作业。4.4.特殊用法特殊用法(1)(1)动词动词thinkthink，wantwant，hopehope，meanmean，planplan，intendintend等用过去完成等用过去完成时来表示过去未曾实现的想法、希望、打算或意图等。时来表示过去未曾实现的想法、希望、打算或意图等。They had wanted to help but could not get there in time.They had wanted to help bu
15、t could not get there in time.他们本来打算去帮忙，但没有及时赶到那里。他们本来打算去帮忙，但没有及时赶到那里。We had hoped to be able to come and see you.We had hoped to be able to come and see you.我们本来希望能来看看你。我们本来希望能来看看你。(2)过 去 完 成 时 还 可 用 在 h a r d l y.w h e n./n o sooner.than.(一就)；It was the first(second，etc.)time(that).等固定句型中。Hardly h
16、ad he begun to speak when he was interrupted by the audience.他刚开始演讲，听众就打断了他。It was the third time that he had been out of work that year.这是他那一年第三次失业了。.完成句子1.This was the first time _ .这是我叔叔第一次去你的城市开会。2.before the teacher came back.在老师回来之前，教室没有被打扫。3.when John told her how to help Bernard out of diffi
17、culty.Meredith太太一到家John就告诉她如何帮助Bernard摆脱困境。that my uncle had gone to your city for aconferenceThe classroom hadnt been cleanedHardly had Mrs Meredith arrived at home4.When the police came in，.警察进来时，许多贵重的东西已经被偷了。5.，but something unexpected stopped us.我们本计划挨家挨户卖爆米花，但是意想不到的事阻止了我们。much valuable stuff ha
18、d been stolenWe had planned to sell popcorn from door to door.语法填空My old friend，Jerry,6._ (live)in the Mediterranean for many years before he returned to England.He had often dreamed of retiring in England and had planned 7._ (settle)down in the country.He had no sooner returned than he 8.(buy)a hou
19、se and went to live there.Almost immediately he began to complain about the weather，for even though it was still summer，it 9._ (rain)continually and it was often bitterly cold.had livedto settleboughtrainedAfter so many years of sunshine，Jerry got a shock.He acted as if he 10.(not live)in England before.In the end，it was more than he could bear.He had hardly had time to settle down when he 11._ (sell)the house and left the country.The dream he 12._ (have)for so many years ended there.Jerry had thought of everything except the weather.hadnt livedsoldhad had
