状语从句的省略.pptx

状语从句的省略状语从句的省略一、连词+介词短语e.g.While(she was)at college,Delia wrote a novel.While(he was)in London,he studied engineering.二、连词+形容词e.g.If(it is)possible,let me know beforehand.Though(he was)exhausted,he stayed up late.尽管疲惫不堪，他仍很晚才睡。Whenever(it is)possible,the children play outside.只要可能，孩子们总在外边玩耍。Avoid structures of this kind wherever(it is)possible.只要可能，都要避免这种结构。三、连词+现在分词e.g.She trembled a little while(she was)doing so.He was carried away when(he was)watching wrestling on TV.They were surprised by her openness when(she was)talking about her private life.四、连词+过去分词e.g.He will come if(he is)asked.如被邀请，他就会来。When(she was)asked,she confirmed that she was going to retire.问她时，她证实了她将要退休。While(she was)locked up in prison,she wrote her first novel.在狱中时，她写出了第一部小说。When(it is)taken according to the instructions,the drug has no side effects.按说明服用，本药无任何副作用。五、连词+不定式e.g.Smiling pleasantly,the stranger turned as if(he was)to speak to me.那个陌生人面带愉悦的笑容，转身向我，似乎想对我说话。注：只有那些只能用作连词的词省略时才能接各种形式,而以下两 句中的before和after是介词，省略后的动词只能用动名词：e.g.Before giving evidence the witness had to take an oath.作证前证人要先宣誓。It would be wise to buy a house after having it appraised.先估价再买房子是明智的。