时间状语从句ppt课件.ppt

教师：樊秀秀,The Adverbial Clause of Time,Emotion and values(情感态度价值观)why?,名词性从句、状语从句以及定语从句这三大从句是高中最重要的语法点。对于从句的考察贯穿高考英语试卷的始终，从第一个单项听力，到最后的写作。三者重要性不分伯仲。但正如大家知道的，“三大”之一的状语从句，种类繁多。时间、地点、原因、结果、条件、让步、目的、比较、方式9种。这9种之中，对于高考来说，重要性的区别是很大的。考频为证，以2006-2010年5年全国高考18个省市的19套卷子的单项选择题为例，涉及到状语从句的题目共有93道，其中时间状语从句考到了24题。由此可见,时间状语从句为重中之重。,Learning Aims(学习目标),1.掌握并灵活应用 when,while,as 的基本用 法及区别；2.学习并掌握 when,while 的特殊用法；3.掌握 since,before 主从句的时态;4.区分 since,before 常用句型。,Knowledge and skills（知识与技能）what?,Learning Aims(学习目标),Process and methods（过程与方法）how?,Students presentation（学生展示）(when,while,as,since,before 的用法)Discussion and the teachers explanation（讨论与教师讲解）(before 与 since 句型的区分)Individual work,group work（个人及小组活动）(练习：exercises),Learning Aims(学习目标),Question presentation（问题呈现）,1.When while as的区别及when,while的特殊用法。(Group 1,3,8,10)2.since的用法及重要句型。(Group 2,8 11)3.before的主从句时态及常用句型。(Group 5,9,10,11)Group:8,10,11,时间状语从句常用的连接词,when whenever as while before after until(till)since as soon as,every timenext timethe first/timethe momentthe minuteinstantlyimmediatelydirectly(一就)No soonerthanHardlywhen,选when,还是while比较像，选as吧！纠结ING（问题1）,Question 1连接词when,while,as的用法区别：,1)when可表示一个时间点，也可表示一个时间段。如：When he came in,we were having supper.When we were having supper,the light suddenly went out.,Question 1连接词when,while,as的用法区别：,2)while则只表示一个时间段。它所引导的时间状语从句中的时态常用进行时态。如：While he was eating his breakfast,he heard the doorbell ring.,Question 1连接词when,while,as的用法区别：,3)as则强调主句和从句的动作在同一时间进行;也可表示“随着”，。As we walked,we talked.As time went by,I began to get used to the school life.,When 常用于下列句式：意为“就在那时”。如：,1.was doing somethingwhen 某人正在做 突然 2.was about to dowhen 某人正要做 突然 3.had just donewhen 某人刚刚做了某事突然,While其他用法,1.while作为并列连词，意为“而，却”，表示对比。Some people waste food while others havent enough.2.while也可用来引导让步状语，意为“尽管，虽然”；可表示尽管，相当于although While I admit that the problems are difficult,I dont agree that they cant be solved.,_ I came to Xin Zhou No.1middle school,I was a top student.In the following days,I didnt get used to the“Three Steps”method quickly.So others studied _ I was lazy and didnt want to make efforts to study hard.As a result,I didnt do well in the exam._ I heard the result,I felt upset._ time went by,I realized that I must try my best _ others werestudying hard.,小故事看区别：when while as,When/As,while,When/As,As,when/while/as,1.We were about to leave_ it began to rain.2.She thought I was talking about her son,_,in fact,I was talking about my son.3._it is true that a students most important goal is to do well in his or her studies,it doesnt need to be the only goal.A.when B.while C.as,对比训练:,A,B,B,Question 2 since,since+从句（注意主从句时态）,Great changes have taken place in your hometown since you left.,It is/has been+一段时间since 从句(did),It is seven years since I joined the Party.我入党7年了。,Question3 before,before 所引导的时间状语从句所表示的动作发生在主句动作之后,主句谓语要用过去完成时,before 引导的从句用一般过去时。Eg:She had studied/studied English for six years before she went to college.,before 的句型,1）It will be段时间before“还要过多才”It will be two years before he leaves the country.2）It was+段时间+before 从句（动作已发生）It was three weeks before he came back.,before 的句型,3）It will not be+long+before“不多久就会”It wont be long before she comes back4）It was not+long+before“不多久就了”It wasnt long before he left the country.,对比训练易混淆句型(易错点）,when/before/since 1.It was 5 am _we arrived at the village.2.It is 3 years _we last met.3.It was two weeks _we met again.,突破点：一看be动词的时态，二看时间段 还是时间点。,when,since,before,is/has been,was/will be,错题汇集（以考代练/周报）,I _(enjoy)the fantastic scenery around _ something unpleasant caught my eyes.When he found there was still some time left before the train had arrived(改错).The city attracts people from all over the world and its ties(联系）with the world _ _(increase)since Sydney Olympic Games.,was enjoying when,have(been)increased,1.掌握并灵活应用 when,while,as 的基本用 法及区别；2.学习并掌握 when,while 的特殊用法；3.掌握 since,before 主从句的时态;4.区分 since,before 常用句型。,Knowledge and skills（知识与技能）what?,Summary(小结),Homework,背诵引导时间状语从句的when,while,as,before,since连词的用法。,Thank you!,