1、Unit 1 Reading 1 The evolution of video and sound devices 高中英语高中英语 必修（第三册）必修（第三册） Unit 1 Nature in the balance Grammar and usage Ellipsis Have you ever watched any TV programmes about environmental protection? What was it about? Yes. It was about air pollution./It was about the extinction of rare an
2、imals./It was about global warming Lead-in 1. What is the documentary about? 2. How did Jack feel when watching the documentary? 3. What do the leading experts suggest doing to solve the environmental problems? Exploring the rules 2. He felt worried when watching the documentary. Exploring the rules
3、 1. Its about environmental protection./Its about some of the worst environmental problems we are facing today. 3. Some call for the application of modern technology, and others a change of lifestyle. Exploring the rules 1. No, I didnt (watch the documentary about environmental protection on TV yest
4、erday). 2. You can watch it online if you want to ( ). 3. I felt worried when ( ) watching the documentary. 4. Some call for the application of modern technology, and others ( ) a change of lifestyle. 5. ( ) Got any idea? 6. ( ) Sounds great! watch it I was call for Have you It/That Have students wr
5、ite down the words that have been left out of the sentences in Part A below the conversation. Working out the rules We sometimes use ellipisis to avoid (1) (stressing/repeating) one or more words when the meaning is clear. We can use ellipsis: in short responses; in infinitives; after some conjuncti
6、ons like if, when and while; in clauses with the same pattern and the same verb; at the beginning of a sentence in (2) (informal/formal) speech. repeating informal 运用省略手法，可以避免重复，使句子简练。常见的省 略现象有以下几种： 1.在非正式场合，如果语境清晰，常省略主语或主语+ 动词。例如： (Are you) Ready? 2.在简短对话中，答句常保留主语和助动词，省略其后 主要动词以及上句出现过的其他内容。例如： Did
7、you go to the museum yesterday? No, I didnt (go to the museum yesterday) Working out the rules Notes 3.在并列句结构中，常省略与前面相同的主语、谓语或其 他成分。例如： (1) Peter entered the classroom and (Peter) sat at his desk. (2) I like dancing but my brother (likes) singing. (3) What I said made Jack happy but (what I said mad
8、e) Jane angry. Working out the rules 4.从属连词when、where、if、than等后常用省略结构。 例如： (1) You should be careful when (you are) crossing the road. (2) You need to make improvements where (it is) necessary. (3) Please call me back if (it is) possible. (4) I love English more than (I) ever (loved English). Workin
9、g out the rules 5.不定式作宾语或宾语补足语时，常省略to后面的内容。 例如： (1) You dont have to do it if you dont want to (do it). (2) Youd better not take medicine unless your doctor told you to (take medicine). 如果不定式后接be动词或动词的完成式，省略句中往往 保留be或have。例如： (1) I am busier now than I used to be (busy). (2) Has Mike finished his pr
10、oject? He seems to have (finished his project). Working out the rules Ellipsis means the act of leaving out a word or words from a sentence deliberately. We can use ellipsis when the meaning can still be understood without using a word or certain words. In other words, ellipsis is used when you do n
11、ot want to repeat some words or phrases whose meaning is obvious. Using ellipsis is an efficient way to make sentences concise. What is ellipsis? When can we use ellipsis? Whats the function of ellipsis? Working out the rules Summary 1. I cannot watch the documentary this weekend, though I would lik
12、e to. 2. Cows live on land, and fish in the water. 3. The Amazon rainforest is smaller now than 50 years ago. 4. He had planned to borrow a book on environmental protection, but he didnt. 5. When taking photos of wildlife, we should make every effort to ensure that we keep away from the animals. App
13、lying the rules Finish B1 on Page 7. Correct the mistakes and rewrite the sentences using ellipsis. Applying the rules Read the short passage in B2 on Page 7 and put brackets around the words that can be left out. Applying the rules Last weekend, I took part in a forest clean-up activity. It was org
14、anized by GreenHope, an organization devoted to protecting forests. At first I didnt want to (take part in the forest clean-up activity), but then I thought, “What if nobody goes?” Our team leader, Joe, took us to a forest outside the city. I was sad to see litter everywhere. There was a “No litteri
15、ng (is allowed here)” sign at the entrance to the forest, but that didnt stop people from throwing their rubbish on the ground. Joe divided us into two groups: one group cleaned up the north side of the forest, and the other (group) (cleaned up) Applying the rules the south side (of the forest). We
16、worked for several hours and (we) were happy to see (that) the forest looked cleaner than (it had looked) before. It was absolutely worth our effort! Therell be another clean-up activity in the green belt next Saturday. You can find Joe and sign up if (youre) willing to help. Everyone who takes part
17、 in the activity will receive a medal. Ill join you too if I have time. Applying the rules Continue Jack and Henrys conversation on designing a brochure about protecting the environment by using ellipsis where possible. Jack: Hi, Henry! Got any good ideas about the brochure? Henry: Yes. How about us
18、ing some pictures and slogans? Jack: Sounds great! I can download some while surfing the Internet after school. Henry: OK. E-mail me if you find any and let me take charge of the rest. Jack: Got it! Lets meet tomorrow afternoon to put it together. Applying the rules Sample answers: 1. Drive less, an
19、d we will have a greener world. 2. When building cities, think of Mother Nature. Describe the pictures of B3 on Page 7 with the help of the example. Consolidation Fill in the blanks by using ellipsis. 1. Misunderstandings resulting from lack of social communication, if not (handle) properly, may lea
20、d to serious problems. 2. Id like to invite you to the coming party, which will take place on the second floor of the dining hall as (expect) 3. You may have finished your homework. If , you can go on to play football. handled expected so 4. Is he coming back tonight? I think . 5. When (arrive), sen
21、d me a telegram. 6. Dont come in until (ask) to. 7. You should let us know the result .(尽快) 8. There are few people nowadays, (如果有), who remember him. asked as soon as possible if any so arriving Consolidation Homework 1. Write a short passage using ellipsis where necessary. 2. Finish the workbook. Homework 1. Read this article aloud. 2. Finish the workbook. 谢谢 谢谢
