高考复习：状语从句的省略

1、状语从句的省略适用学科英语适用年级高三适用区域全国课时时长（分钟）1课时/60分钟知识点 状语从句的省略教学目标知识：状语从句的省略方法：简明扼要的讲解，并配套经典习题的练习能力：提升对状语从句的省略的的熟练程度教学重点状语从句的省略教学难点掌握规律，正确做题教学过程一、 课堂导入首先让学生们明确，什么是省略：1.省略是一种避免重复、保持简洁的语法手段。2.凡是缺少一个或一个以上的必要语言成分，但在一定语境中能够独立存在，意义明确，并且能发挥交际功能的句子就是省略句。二、复习预习对上一节课的时间状语从句布置的作业进行讲解，点评，让学生们通过讲评能够复习上节课的知识。之后让我们先看下面两道历年高

2、考试题，并请同学们先讨论如何选择，同时老师注意发现学生们的盲点：1.When_, the museum will be open to the public next year.A. completed B. completing C. being completed D. to be completed(2002年上海春季试题) 2.Unless_ to speak, you should remain silent at the conference.A. invited B. inviting C. being invited D. having invited三、知识讲解知识点1：什么

3、是状语从句的省略我们在使用时间、地点、条件、让步、原因、比较或方式等之类的状语从句时，如果其中谓语部分含有to be的任何一种形式，而主语又与主句的主语相一致或主语为it时，为避免重复，使语言生动、自然、简洁，常可以省略从句德主语和谓语的部分，特别是动词be。这种现象称为状语从句的省略。下面做简要例析。1【考查点】 时间状语从句的省略。这类从句主要由when，while，as soon as，once，until等引导。例如：1.When (he was) still a boy of ten, he started working to support himself.2.Dont leav

4、e the machine till (you are) told to.3.Ill let you know as soon as (it is) arranged.但要注意，before和after虽然也可以用作连词引导时间状语从句，却不能用于这类省略主语和be的结构。例如：The plan should be discussed once again before it is carried out.上句不能改为：The plan should be discussed once again before carried out.上句也可以改为：The plan should be di

5、scussed once again before being carried out. (句中before不是连词而是介词，后面的being carried out是V-ing形式短语作介词的宾语，整个句子是简单句，而不是复合句。2【考查点】 地点状语从句中的省略。主要由where, wherever引导。例如：1.He is always ready to help others wherever (he is) needed.2.You can add some words to your composition where (it is) necessary.3【考查点】 条件状语从句

6、的省略。主要由if，unless引导。例如：1.She wont go to his birthday party unless (she is ) invited.2.The news is quite important to us, if (it is) true.但若if引导的是表示假设的虚拟条件句，虽具备条件，可不能用于这类省略。另外，当once作一旦，一经解，连接时间或条件状语从句，其主语与主句的主语相同或其主语为it + be时，常省略从句中的主语或it + be。例如：Once (it was) published, his work became famous for the

7、 absence of rhyme at the end of each line.Once (you) lose confidence, you can never expect to do your work well.4【考查点】 让步状语从句的省略。主要由though，although，however，whatever，even if，even though，no matter how/what引导。例如：1.Though (he had been) defeated many times, he didnt lose heart.2.They worked very hard, th

8、ough (he was) still rather weak.与if引导的虚拟条件从句不能用这类省略一样，as引导的让步状语从句同样不能省略。不过如果让步状语从句由as引导时，从句中的表语（一般是形容词或名词）或状语必须提前到as前，构成倒装。如果作表语的是单数可数名词，则还须省略不定冠词。例如：Poor as he was, he was honest.Hard as he tried, he still failed.5【考查点】 原因状语从句的省略。主要由because引导。例如：1.He decided not to watch the foot ball match because

9、 (he was) not himself.2.I forget to post the letter for you because (I was) too busy.6【考查点】比较状语从句的省略。主要由as，than引导。例如：1.In winter it is much colder in Beijing than (it is) in Shanghai.2.The project was completed earlier than (it was) expected.3.Mary is not so shy as (she was) a year ago when I first

10、met her.7【考查点】 方式状语从句的省略。主要由as，as if引导。例如：1.The old man sat at the corner alone, as if (he was) thinking of something.2.English is not so difficult to learn, as (it is) generally supposed.四、例题精析【例题1】When _for his views about his teaching job, Philip said he found it very interesting and rewarding. A

11、. asking B. asked C. having asked D. to be asked 【答案】B【解析】B. When asked=When he was asked,状语从句的简化。 【例题2】I have a tight budget for the trip，so Im not going to fly_the airlines lower ticket prices.Aonce BifCafter DUnless【答案】D【解析】句意为：我最近没钱旅行，所以如果航空公司不降价，我就不打算坐飞机了。unless除非，如果不。【例题3】We all know that,_ ,

12、the situation will get worse. A. not if dealt carefully with B. if not carefully dealt withB. C. if dealt not carefully with D. not if carefully dealt with 【答案】B【解析】 B 句子还原为：If it is not carefully dealt with状语从句的省略。 【例题4】1、 The experiment shows that proper amounts of exercise, if_ regularly, can improve our health. A. being carried out B. carrying out C. carried out D. to carry out 【答案】C【解析】C. 考查if条件句中的省略情况。本句的句子的主语是the experiment；谓语动词是shows；that引导宾语从句, 宾语从句的主干是：proper amounts of exercise can improve our health, if_ regularly是插入的条件从句, 从句的主语是proper amounts of exercise, 此时应用it代替前面提到的主语, 条件句的主语与