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1、Unit 1 Nature in the balanceGrammar and usage教学设计I. Learning objectivesBy the end of the lesson, students will be able to:1. master the rules of ellipsis;2. use the rules of ellipsis to improve their compositions;3. raise their awareness of environmental protection.II. Key competence focusDevelop th
2、e thinking ability by comparing and summarizing.III. Predicted area of difficulty1. Explore the rules of ellipsis.2. Convey ideas using ellipsis correctly and properly. IV. Teaching proceduresStep 1 Lead-in T asks Ss to look at some elliptical sentences in the daily life to arouse their interest. No
3、 smoking (is allowed here). Parking (is allowed here). No photos (is allowed here). No fishing (is allowed here).【设计意图：创设情景，激活学生认知，自然地引入主题。】Step 2 Introduction of ellipsis1. T asks Ss to find the words that can be left out and tell the reasons why the words can be left out. I have done more than (wh
4、at is) required. (You) open the window and the door for me, please. Will you go to the cinema with me? Well, Id like to (go with you). I know you can do better than I (can do). You shouldnt come to this party unless (you were) invited. The man (whom) I saw is called David.2. T introduces what ellips
5、is is. T: What is ellipsis? Ellipsis means leaving out words of a sentence when the meaning can still be understood. Ellipsis is used when you do not want to repeat the words and phrases that are obvious. 【设计意图：初步了解省略的用法，为下一步的学习探究做准备。】Step 3 Exploring the rules1. T asks Ss to read a conversation bet
6、ween Jack and Henry and write down the words that have been left out in the conversation on page 6.Answers: No, I didnt (watch the documentary about environmental protection on TV yesterday). In short responses You can watch it online if you want to (watch it). In infinitives I felt worried when (I
7、was) watching the documentary. After some conjunctions like if, when and while Some call for the application of modern technology, and others (call for) a change of lifestyle. In clauses with the same pattern and the same verb (Have you) Got any ideas? At the beginning of a sentence in informal spee
8、ch (It/That) Sounds great! At the beginning of a sentence in informal speech2. T asks Ss to work out the rules and offers Ss more examples to help them better understand the rules. We sometimes use ellipsis to avoid repeating one or more words when the meaning is clear. We can use ellipsis:* in shor
9、t responses;Have you ever attended a talk about environmental protection? Never. (= I have never attended a talk about environmental protection.)* in infinitives;You may go with them if you want to. (= You may go with them if you want to go with them.)Will you be able to come? Id love to. (= Id love
10、 to come.)* after some conjunctions like if, when and while;Though very young, he is very good at painting. (= Though he is very young, he is very good at painting.)You should be careful when crossing the street. (= You should be careful when you cross the street.)* in clauses with the same pattern
11、and the same verb;He got up earlier than I today. (= He got up earlier than I got up today.) Has he gone or not? (= Has he gone or has he not gone?)* at the beginning of a sentence in informal speech.Ready? (= Are you ready?)【设计意图：这是这堂课的核心部分，该环节将语法知识和语境相结合。让学生通过自主学习、自主探究的方式，了解省略的用法，体会对话中的省略现象，通过分类、概
12、括语言信息，归纳出省略的语法规则，逐步从感性认识上升到理性认识，培养学生的学习能力和语言能力。】Step 4 Practice 1. T asks Ss to finish B1 on page 7 on their own. T: Please find the mistakes and rewrite the sentences using ellipsis.Answers: I cannot watch the documentary this weekend, though I would like to. We cannot leave out to in infinitives w
13、hen using ellipsis. Cows live on land, and fish in the water. Different prepositions are used and they cant be left out. The Amazon rainforest is smaller now than 50 years ago. When using ellipsis in clauses with the same pattern, the subject and the verb should be left out altogether. He had planne
14、d to borrow a book on environmental protection, but he didnt. When using ellipsis in compound sentences, the part behind the auxiliary verb should be left out altogether. When taking photos of wildlife, we should make every effort to ensure that we keep away from the animals. When using ellipsis in
15、adverbial clauses, we need to make sure that the subject of the main clause is the same as the subject of the subordinate clause. 【设计意图：在学生掌握了省略的基本用法之后，通过上面的练习，加深对语言规则的理解，培养学生运用语言的能力，提升学生的批判性思维能力。】2. Tasks Ss to work in groups to finish B2 on page 7.T: Jack is sharing with his classmates his experience of taking part in a forest clean-up activity. Use ellipsis where necessary. Put brackets around the word(s) that can be left out and then tell the reason why the word(s) can be left out.Answers: At first I didnt want to (take part in the forest clean-up activi
