1、Unit 1Reading 1The evolution of video and sound devices 高中英语高中英语 必修（第三册）必修（第三册）1Unit 1 Nature in the balanceGrammar and usageEllipsis2Have 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 animals./
2、It was about global warming Lead-in31.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 rules42.He felt worried when watching the documentary.Exploring the rules1.Its about env
3、ironmental 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.5Exploring the rules1.No,I didnt(watch the documentary about environmental protection on TV yesterday).2.You can watch i
4、t 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 itI wascall forHave youIt/ThatHave students write down the words that have been left out of the sen
5、tences in Part A below the conversation.6Working out the rulesl We sometimes use ellipisis to avoid(1)(stressing/repeating)one or more words when the meaning is clear.l We can use ellipsis:in short responses;in infinitives;after some conjunctions like if,when and while;in clauses with the same patte
6、rn and the same verb;at the beginning of a sentence in(2)(informal/formal)speech.repeatinginformal7 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 you go to the museum yesterday?No,I didnt(go to the museum yesterday)Wor
7、king out the rulesNotes8 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 made)Jane angry.Working out the rules9 4.从属连词when、where、if、than等后常用省略结构。例如：(1)You should be
8、 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).Working out the rules10 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
9、 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 project?He seems to have(finished his project).Working out the rules11Ellipsis means the act of leaving out a word or word
10、s 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 not want to repeat some words or phrases whose meaning is obvious.Using ellipsis is an efficient way to make sentences concise
11、.l What is ellipsis?l When can we use ellipsis?l Whats the function of ellipsis?Working out the rulesSummary121.I cannot watch the documentary this weekend,though I would like 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 bo
12、rrow 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.Applying the rulesFinish B1 on Page 7.Correct the mistakes and rewrite the sentences using ellipsis.13Applying the rulesRead the short passag
13、e in B2 on Page 7 and put brackets around the words that can be left out.14Applying the rulesLast weekend,I took part in a forest clean-up activity.It was organized by GreenHope,an organization devoted to protecting forests.At first I didnt want to(take part in the forest clean-up activity),but then
14、 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 littering(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 group
15、s:one group cleaned up the north side of the forest,and the other(group)(cleaned up)15Applying the rulesthe south side(of the forest).We 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 cl
16、ean-up activity in the green belt next Saturday.You can find Joe and sign up if(youre)willing to help.Everyone who takes part in the activity will receive a medal.Ill join you too if I have time.16Applying the rulesContinue Jack and Henrys conversation on designing a brochure about protecting the en
17、vironment by using ellipsis where possible.Jack:Hi,Henry!Got any good ideas about the brochure?Henry:Yes.How about using 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:
18、Got it!Lets meet tomorrow afternoon to put it together.17Applying the rulesSample answers:1.Drive less,and 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.18ConsolidationFill in the blanks by using ellipsis
19、.1.Misunderstandings resulting from lack of social communication,if not (handle)properly,may lead to serious problems.2.Id like to invite you to the coming party,which will take p l a c e o n t h e s e c o n d f l o o r o f t h e d i n i n g h a l l a s (expect)3.You may have finished your homework.
20、If ,you can go on to play football.handledexpectedso194.Is he coming back tonight?I think .5.When (arrive),send 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.askedas soon as possibleif anysoarrivingConsolidation20Homework1.Write a short passage using ellipsis where necessary.2.Finish the workbook.21Homework1.Read this article aloud.2.Finish the workbook.谢谢 谢谢22
