状语从句中的省略

be doing waiting for someone
shຫໍສະໝຸດ Baidu was
3.Tom raised his hand as if he was to say be to do something.
to say something
4.I’ll buy a TV set if necessary.
主系表 necessary
状语从句的省略
.
.
观察思考
1.Unless______ to speak, you should remain silent at the conference. 分析： Unless______ to speak，是条件状语从句的省略，其之间省略了 A. invited B. inviting C. being invited D. you are, 原句可变为： Unless you are invited to speak, you should remain silent at the conference having invited 2. While ______ alone in the street, I heard my name called. 分析 : While ______ in the street, 是时间状语从句的省略，原 A. walked B.alone walking C.walk D.being 句可变为： walked While I was walking in the street, I heard my name called. 3．Tom raised his hand as if______something. 分析 ：as if_________something. 方式状语从句的省略，原句可 A. said B. say C. saying D. to say 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 someone. she was waiting for
•．
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？
be done
1.Don’t speak until you are spoken to .
spoken to
2.She stood at the gate as if waiting for someone.
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。
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。
课后检测
1._____________________ When/While in Beijing (在北京的时候), I paid a visit to the Summer Palace. When/As a young man 当是个年轻人的时候), 2. ______________________( Abraham Lincoln was a storekeeper and a postmaster. 3. He has no money. ______ If any (要是有的话), he will give us. Unless repaired 除非修理), the machine is of no use. 4._____________( 5. _______________________( If given more attention to 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 _________ _____________________( talking with a teacher 跟老师讲话).
3. While I was walking alone in the street, my name was called. 4. While I was walking my name was called. alone in the street, I heard
5. He was a swimmer when he was a child. 6. I’ll buy a TV set if it is necessary.
it is
5.He was a swimmer when he was a 主系表 child
a child
通过以上例句我们可以总结出含有be 动词的结 构:
进行时结构：be 被动语态： be 将来时: be 主系表结构：be 语
doing, done, to do, +名词/形容词（短语）/ 介词短