1、Unit 6 When was it invented?Section A（GF-4c）Teaching Aims 1.语言能力：了解电话发明的过程。2.思维品质：学会运用一般过去时的被动语态改写句子。3.学习能力：恰当使用一般过去时的被动语态。Teaching Difficulties被动语态的用法Teaching Aidsmultimedia courseware or other realia that the T needs for teaching Teaching ProceduresTipsStep 1 Warming up猜发明不是重点，重点是通过这个活动练习使用被动语态。 P
2、air WorkAsk Ss to pair up. S1 thinks of an invention and S2 asks questions about it. S2 should guess what the invention is by asking the questions.(Tip: Ss can follow the example on PPT P8, or they can make their own conversation. T should encourage Ss to use the passive voice.)Step 2 Presentation &
3、 Practice Show Ss sentences with active voice and passive voice, ask them to find out the differences between them. Use the sentences “Whitcomb Judson invented the zipper in 1893.” and “The zipper was invented by Whitcomb in 1893.”as an example, ask Ss to pay attention to the position change of each
4、 sentence component.Grammar Focus Ask Ss to read the sentences in the box and explain the usage of passive to them.语态是动词的一种形式，用来说明句中主语和谓语动词的关系。如果主语是动作的执行者，则使用主动语态；如果主语是动作的承受者，则使用被动语态。被动语态有“be动词 + 过去分词”构成，如果要特别强调动作或行为的执行者时，句子后面需接by .，译为“被/由.”。其中be动词要根据人称、数和时态发生变化、be动词后面的过去分词不变。被动语态的肯定句：主语 + be + 过去分词
5、 + (by .).被动语态的否定句：主语 + be not + 过去分词 + (by .).被动语态的一般疑问句：Be + 主语 + 过去分词 +（by . ）?被动语态的特殊疑问句：疑问词 + be + 主语 + 过去分词 +（by . ）?4a Ask Ss to rewrite the sentences using the passive voice.Answers: 1. The fridge was sold at a low price. 2. My camera was stolen from my hotel room (by somebody). 3. Where wer
6、e these photos taken? 4. We were advised not to go out alone by our parents. 5. The book was translated into different languages by different writers.4b Ask Ss to complete the sentences with the correct forms of the verbs in the box.Answers: 1. were invited 2. were brought 3. was locked; rang 4. wer
7、e told; broke 5. were eaten; liked 4c Ask Ss to read the short passage and decide whether active or passive forms should be used in the sentences.Answers: was invented, was born, worked, learned, was invented, was said, is usedStep 3 Summary & Homework Summary Ask Ss to do the exercises from PPT P23-24.Homework Preview Section B 1a-1e. Do the exercises in students book.Teaching ReflectionIn this period, students should learn the grammar. We must practice the active voice and the passive voice by rewriting sentences and remember the changes.3
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