状语从句中的省略讲述.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 3．Tom 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) don’t 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. I’ll 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.Don’t 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.I’ll 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.