状语从句的省略ppt课件.ppt

状语从句的省略,（1）在状语从句中如果主语与主句的主语一致，同时从句中又含有动词be则通常可省去从句中的主语和动词be，留下其余部分。1.She stood at the gate as if（she was）waiting for someone.她站在门口好像在等人。2The woman teacher hurriedly left the classroom as though（she was）angry.这位女教师匆匆忙忙离开教室，好像生气了。3.The man,while（he is）over eighty,can walk faster than I.这人虽年过八十，却比我走得快。,4.Dont speak until（you are）spoken to.有人对你说话时你才说。5.Be careful while（you are）crossing the road.过马路时要当心。6.When(it is)heated,ice can turn into water.冰经过加热能变成水。,（2）若状语从句中主语是it，动词是系动词be，则通常可省去主语it及系动词be，留下其余部分。1.Though(it was)cold，he still wore a shirt天气虽然冷，他还穿一件衬衫。2.Come tomorrow if(it is)possible可能的话就明天来吧。3.If(it is)so，you must get back and get it如果这样的话，你必须回去把它拿来。4.I11 buy a TV set if(it is)necessary如有必要，我就买一台电视机。,5.Everything went on better than(it had been)expected一切进展得比预料的顺利。6.No matter how difficult(it may be)，we are determined to carry the research to the end 不管有多困难，我们决心把研究进行到底。,（3）状语从句中的部分内容若与主句的部分内容相同，可将从句中的此部分内容省去。1.He has no moneyIf(he has)any，he will give us他没有钱，如果有，他会给我们的。2.Some flowers shut up at night as if(they did this in order)to sleep有些花夜间收拢，好像为了睡眠一样。,状语从句省略具体分析。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：When(she was)very young,she began to learn to play the piano.她很小时，就开始学习弹钢琴。While(I was)at college,I began to know him,a strange but able student.我在上大学时就开始认识他，一个奇怪但有能力的学生。,Whenever(it is)possible,you should come and help.不管什么时候只要有可能就来帮忙。Dont come in until(you are)asked to.不叫你请你不要进来。You should let us know the result as soon as(it is)possible.你应尽快让我们知道结果。,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.,条件状语从句的省略。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.,