高教版中职英语基础模块 第2册Unit 7So much to do before we travelppt课件2

时间状语从句时间状语从句掌握状语从句的关键掌握状语从句的关键1.1.准确掌握每一个准确掌握每一个连词的含义连词的含义。2.2.注意主句和从句的注意主句和从句的时态呼应时态呼应。状语从句分类1.表示时间表示时间 2.表示地点表示地点 3.表示原因表示原因 4.表示结果表示结果 5.表示目的表示目的6.表示条件表示条件7.表示让步表示让步8.表示比较表示比较时间状语从句？用表示时间的连词连接一个句子作状语，这样的主从复合句就是时间状语从句。连接词：when,while,as,before,after,until,notuntil,since,the moment,each(every,next,the first)time 连接词类别 作 用asas 从句中动词是延续性时，侧重表示主从句动作同时发生，意为“一边一边”when强调动作的先后性，从句动词可以是延续性动词也可以是非延续性动词。while强调动作的持续性及同时性，从句常用延续性动词。1.1.连接词连接词when,while,as when,while,as 的用法区别的用法区别用用while,when填空填空：Mozart started writing music _ he was four years old.He visited a lot of places _ he was traveling.She always listend to light music _ she does some cleaning.whenwhileas1.when 从句的主语与主句的主语相同，谓语动词是be 动词时，从句主语和be 可以省略e.g.When(she was)walking along the street,she met her class teacher.注意When 的特殊用法2.when 可做并列连词用，表示可做并列连词用，表示“就在那时就在那时”相当于相当于and at this/that time。注意注意When 的特殊用法的特殊用法We were having a class when someone broke in.(突然有人闯了进来突然有人闯了进来).We were about to set off when it began to rain.(这时开始下雨了这时开始下雨了)while 的特殊用法的特殊用法 while 可用于对比，意为可用于对比，意为“然而然而”e.g.I prefer black tea,while he likes coffee.PRACTICEPRACTICE1.We were swimming in the lake _ suddenly the storm started.A.when B.while C.until D.before2.He was about to tell me the secret _someone patted（拍）（拍）him on the shoulder（肩膀）（肩膀）.A.as B.until C.while D.whenA AD D2).until/tillHe did not go to bed until he finished his work.（直到直到才才）=Not until he finished his work did he go to bed.注意注意:not until 在句首时主句要倒装在句首时主句要倒装表示表示“直到直到为止为止”，在句首或强调句型中，在句首或强调句型中，一般用一般用until;在主句后，在主句后，till 和和 until 均可。均可。3).before“还未还未就就”,“不到不到就就”“才才”；We hadnt run a mile before tired.(我们还没跑到一里就累了）我们还没跑到一里就累了）Do it now before you forget.I have been teaching here since I graduated.4).after “在在之后之后”He left the classroom after he had finished his homework the other day.前几天他做完作业之后离开了教室。前几天他做完作业之后离开了教室。He called me after he had finished his work.工作完了之后他给我打了个电话。工作完了之后他给我打了个电话。5).as soon as “一一就就”Ill tell him about it as soon as he comes back.他一回来我就告诉他这件事。他一回来我就告诉他这件事。As soon as he heard the news,he jumped with joy.他一听到消息，就高兴地跳了起来。他一听到消息，就高兴地跳了起来。6).since “自从自从.”，主句常用现在完，主句常用现在完成时，从句常用一般过去时成时，从句常用一般过去时We have been friends ever since we met at school.我们自从在学校认识至今一直是朋友。我们自从在学校认识至今一直是朋友。常用句型常用句型“It is/has been+时间段时间段+since从句从句”译为译为“自从自从多长时间了多长时间了”It is three years since she joined the army.时间状语从句其它引导词：时间状语从句其它引导词：the moment,the minute,every time,each time,by the time,the day等，也可引导一个时等，也可引导一个时间状语从句。间状语从句。The day he returned home,his father was already dead.Every time I caught a cold,I had pain in my head.The moment I saw him,I recognized him.Practising 1.Ill write to you _ I get there.A.while B.before C.as soon as D.by2.He has lived in the city _ he came back from America.A.when B.before C.since D.after3.We wont leave here _ our teacher comes back.A.until B.since C.after D.as soon as4.I had to finish the picture _ my mother came back.A.until B.before C.after D.while5.John fell asleep _ he was listening to the music.A.after B.before C.while D.as soon as Practising 6.It seemed only seconds _ the boy finished washing his face.A.when B.before C.after D.even if7.We were told that we should follow the main road _ we reached the central railway station.A.whenever B.until C.while D.wherever8.I recognized you _ I saw you at the airport.A.the moment B.while C.after D.once 9.He was about to go to bed _ the doorbell rang.A.while B.as C.before D.when10._I listen to your advice,I get into trouble.A.Every time B.When C.While D.Until