状语从句中的省略.pptx

,状语从句的省略,观察思考,1.Unless_ to speak, you should remain silent at the conference. A. invited B. inviting C. being invited D. having invited 2. While _ alone in the street, I heard my name called. A. walked B. walking C.walk D.being walked 3Tom raised his hand as if_something. A. said B. say C. saying D. to say,.,分析：Unless_ to speak，是条件状语从句的省略，其之间省略了you are, 原句可变为： Unless you are invited to speak, you should remain silent at the conference,分析 : While _ alone in the street,是时间状语从句的省略，原句可变为： While I was walking in the street, I heard my name called.,.,分析 ：as if_something.方式状语从句的省略，原句可变为： Tom raised his hand as if he was to say something,归纳总结,1.（You) dont speak until you are spoken to. 2. She stood at the gate as if she was waiting for someone. 3. While I was walking alone in the street, my name was called. 4. While I was walking alone in the street, I heard my name was called. 5. He was a swimmer when he was a child. 6. Ill buy a TV set if it is necessary.,省略规则,当从句的主语和主句的主语一致(或者从句的主语为it) 从句谓语中包含be动词,重难点解析,哪些谓语结构中包含be 动词？被保留的部分是什么？,.,1.Dont speak until you are spoken to . 2.She stood at the gate as if she was waiting for someone.,be done,spoken to,be doing,waiting for someone,3.Tom raised his hand as if he was to say something. 4.Ill buy a TV set if it is necessary. 5.He was a swimmer when he was a child,be to do,to say something,主系表,necessary,主系表,a child,进行时结构：be doing, 被动语态： be done, 将来时: be to do, 主系表结构：be +名词/形容词（短语）/ 介词短语 因此在省去从句的主语和be动词保留be之后的部分，被保留部分常为现在分词、过去分词、不定式、形容词等。,通过以上例句我们可以总结出含有be 动词的结构:,特别关注,若从句的主句是it或与主句的主语相同，且在谓语中含有be时，常省略从句的主语和be。 被保留部分常为现在分词、过去分词、不定式、形容词等。,1._ (在北京的时候), I paid a visit to the Summer Palace. 2. _(当是个年轻人的时候), Abraham Lincoln was a storekeeper and a postmaster. 3. He has no money. _ (要是有的话), he will give us. 4._(除非修理), the machine is of no use. 5. _(要是给更多的关注), The boy could have turned out better. 6. A girl stood at the gate of the school as if _ _(跟老师讲话).,When/While in Beijing,When/As a young man,I