八上外研社Unit-1-While-the-lights-were-changing-to-red-a-car-suddenly-appearedPPT文档格式.ppt

1、when既可表示某一点既可表示某一点时间，也可以表示某一段，也可以表示某一段时 间。在。在when引引导的的时间状状语从句中，其从句中，其谓语动词 可以是延可以是延续性的，也可以是非延性的，也可以是非延续性的，可与主句性的，可与主句 中的中的谓语动词同同时发生，也可在其后生，也可在其后发生。生。1.I was just reading a book when she came into my room.她走她走进我房我房间时，我正在看，我正在看书。2.Were you writing a letter when the teacher came in?老老师进来的来的时候，你在写信候，你在写信

2、吗？when和和while的区的区别还在于：在于：while引引导的的时间状状语从句多从句多用用进行行时态，而，而when引引导的的时间状状语从句多用一般从句多用一般时态。1.While they were talking,the bell rang.在他们谈话的时候，铃响了。在他们谈话的时候，铃响了。2.I was doing my homework when my mother came back home yesterday evening.昨天晚上妈妈回家的时候，我正昨天晚上妈妈回家的时候，我正在做家庭作业。在做家庭作业。三、当主句和从句的动作都是延续的或同时发生的，三、当主句和从句的

3、动作都是延续的或同时发生的，两句都用过去进行时的时候，多用两句都用过去进行时的时候，多用while引导。引导。e.g.They were singing while were dancing.他们在唱歌，我们在跳舞。他们在唱歌，我们在跳舞。1.My mother was cooking.My father was watching TV.2.I was waiting at the bus stop.Jim made a phone call to me.My mother was cooking while my father was watching TV.I was waiting at

4、 the bus stop when Jim made a phone call to me.Combine the sentences with“when”or“while”.paleappearroundcornerhitgladriskattentionsideaccident driver happen mobile phone policeman road policewoman policewomen policeman policemen drivermobile phone fall off his bike hurt his knee pale苍白的苍白的What advic

5、e can you give when someone are riding a bike?4.Pay attention，stop at the red lights!1.Dont ride too fast!3.Dont ride side by side with your friends!2.Dont listen to music!listen to the music从从跌落跌落1.Who saw the accident?2.2.Did the car stop just in time?Ms James.Yes,it did.点击此链接播放声音1.What was the bo

6、y doing when he was riding his bike?He was listening to music.2.When did a car suddenly appear round the corner?While the lights were changing to red.3.Did the boy fall off his bike?Yes,he did.Betty:Good morning,Ms James!You look pale.Are you all right?Ms James:Im OK,but I saw an accident.A boy was

7、riding his bike and listening to music on the road.Daming:Thats very dangerous!I was waiting to cross the road.While the lights were changing to red,a car suddenly appeared round the corner.It wasnt going fast,but it didnt stop.Lingling:Did the boy stop?No.And the driver was talking on his mobile ph

8、one.Betty:Did the boy car hit the boy?No,Im glad to say.The car stopped just in time,but the boy fell off his bike and hurt his knee.Tony:Thats too bad.Ms James:So when youre on your bike,think about the risk of an accident!Pay attention,stop at the red lights andwhat else?Betty:Dont ride too fast.D

9、aming:Dont ride side by side with your friends.Ms James:Anything else?All:Dont listen to music!1.You look pale.2.pale表示表示“苍白的苍白的”，形容词。，形容词。3.look是感官动词。是感官动词。4.look pale 看起来苍白看起来苍白5.e.g.She has a pale face.她脸色苍白。她脸色苍白。2.A car suddenly appeared round the corner.appear v.出现；显露出现；显露 round prep.转到（某物的）另一

10、边转到（某物的）另一边 e.g.The boy suddenly appeared from under the bed.小男孩突然从床下钻出来。小男孩突然从床下钻出来。He walked round the corner into the next street.他走过拐角，到了另一条街上。他走过拐角，到了另一条街上。3.The car stopped just in time,but the boy fell off his bike and hurt his knee.in time表示表示“及时及时”，just强调强调“刚刚，正好刚刚，正好”。表。表达达“及及时做某事时做某事”可以用可

11、以用in time to do sth.e.g.If we dont hurry up,we wont be in time to catch the train.如果不抓紧时间的话，我们就来不及赶上火车了。如果不抓紧时间的话，我们就来不及赶上火车了。fell是是fall的过去式。的过去式。fall off表示表示“从从跌落跌落”。e.g.He fell off the tree and hurt his leg.他从树上跌落，摔伤了腿。他从树上跌落，摔伤了腿。fall down表示表示“摔倒摔倒”。e.g.You must watch your step so as not to fall

12、down.你必须留心脚下才不会跌下去。你必须留心脚下才不会跌下去。5.Pay attention,stop at the red lights pay attention 表示表示“注意，留心注意，留心”。pay attention to n./v-ing 表示表示“注意注意”。e.g.You must pay attention to your study.你必须专心学习。你必须专心学习。Please pay attention to spelling.请注意拼写。请注意拼写。6.Dont ride side by side with your friends.side by side表示表示“并排的，肩并肩的并排的，肩并肩的”。e.g.They were walking side by side in the street.他们肩并肩走在街上。他们肩并肩走在街上。Are you all right?Thats too bad.Anything else?When you are riding a bike,think about the risk of an