1、精选精选ppt1精选精选ppt2Examples in our textbook1.When he was orbiting in the capsule,he took photographs of planet earth.2.When yang landed,Premier Wen Jiabao telephoned the Control Centre to offer his congratulations.3.When Yang took off from Jiuquan in northwest China at 9 am yesterday,China became the.4
2、.While he was travelling in space,Yang spoke to two astronauts aboard the.5.While she was waiting a taxi outside,she met Sam Parrish.精选精选ppt3 一、一、when/while 的区别的区别 1.when表示主从句两个动作同时发生或表示主从句两个动作同时发生或先后先后发生。而发生。而while表示主从句两个动作同时发生表示主从句两个动作同时发生或或强调主句的动作在从句动作进行期间发生。强调主句的动作在从句动作进行期间发生。(1)_ they are waiti
3、ng for the New Year,they listen to music,sing songs and dance.(2)_ the boy saw his mother,he stopped crying.WhileWhen精选精选ppt42.when+短暂性动词或延续性动词短暂性动词或延续性动词 while+延续性动词延续性动词(一般为一般为be doing。)(1)He was doing his homework _ I saw him.(2)Please dont talk so loud _others are working.3.进行时进行时+while+进行时进行时Sh
4、e was dancing _ I was singing4.从句动作和主句动作同时发生，且从句动作为延续性动词时，when，while，as都可使用 _she was singing,we all lost ourselves in her beautiful voice.注意：延续性动词表达的动作能够延续，如：注意：延续性动词表达的动作能够延续，如：keep保存，维持；保存，维持；walk走路；走路；read 阅读等；非延续阅读等；非延续性动词也称瞬间动词，所表达的动作不能够延续。如：性动词也称瞬间动词，所表达的动作不能够延续。如：hear听到；听到；return 归还；归还；see看见。
5、看见。whenWhen/While/Aswhilewhile精选精选ppt53.用用while,when填空填空：_ I was walking down the street,I noticed a police car in front of the store._ John arrived,I was cooking lunch.I was wandering（徘徊）（徘徊）through the street_ I caught sight of a tailors shop.When/While/AsWhenwhen精选精选ppt6 _was walking down the str
6、eet，I saw some policemen _they heard the news，they were surprised _the child was playing with his toys，his parents were watching TV.They shouted slogans _they passed the square.when表示从句动作和主句动作同时发生，或先于主句动作；表示从句动作和主句动作同时发生，或先于主句动作；while表示从句的动作与主句动作同时发生，并有延续的含义；表示从句的动作与主句动作同时发生，并有延续的含义；as从句动作与主句动作同时发生，
7、常译为从句动作与主句动作同时发生，常译为“一边一边一边一边”。从句动作和主句动作同时发生，且从句动作为延续性动词时，从句动作和主句动作同时发生，且从句动作为延续性动词时，when，while，as都可使用都可使用.When/While/AsWhenWhile as二、二、whenwhileas的用法。的用法。精选精选ppt7总结：相当于总结：相当于and at this/that time。意思为。意思为“正在正在/刚要刚要这这/那时（突然那时（突然）”三、三、When 的特殊用法的特殊用法We were having a class _someone broke in.(突然有人闯了进来突然
8、有人闯了进来).We were about to set off_it began to rain.(这时开始下雨了这时开始下雨了)whenwhen精选精选ppt8 be doing/be going to do sth be about to do sth.had just done+when When的常用于下列句式：的常用于下列句式：意思为意思为“正在正在/刚要刚要/刚做完刚做完这这/那时（突然那时（突然）”精选精选ppt9Exercise1.We were swimming in the lake _ suddenly the storm started.A.whenB.while C
9、.untilD.before2.He was about to tell me the secret _someone patted（拍）（拍）him on the shoulder（肩膀）（肩膀）.(上海上海)A.as B.until C.while D.whenAD精选精选ppt103.He made a mistake,but then he corrected the situation _ it got worse.A.untilB.when C.beforeD.as4.Ill write to you _I get there.A.while B.before C.as soon
10、as D.byCC精选精选ppt115.Was his father strict with him when he was at school?Yes.He had never praised him _ he became one of the top students in his grade.A.afterB.unless C.untilD.when6.He was about to tell me the secret _ someone patted him on the shoulder.A.asB.until C.whileD.whenCD精选精选ppt12 7.He has
11、lived in the city _ he came back from America.A.when B.before C.since D.after8.We wont leave here _ our teacher comes back.A.until B.since C.after D.as soon as9.I had to finish the picture _ my mother came back.A.until B.before C.after D.while10.John fell asleep _ he was listening to the music.A.aft
12、er B.before C.while D.as soon as C ABC精选精选ppt13四、时间状语从句其它引导词小结：四、时间状语从句其它引导词小结：the moment,the minute,immediately,instantly，every time,since,before,after,until,notuntil,as soon as 等等 1.They rushed out of the room immediately they heard a loud noise.(他们一听到一声巨响就从房间里他们一听到一声巨响就从房间里冲了出来）冲了出来）2.As soon as
13、he comes,Ill tell him.3.The moment I saw him,I recognized（认出）（认出）him.4.The boy didnt go to bed until his parents came back.精选精选ppt14用括号内动词的正确形式填空 1.My mother _(cook)dinner when I _(get)home last night.2.I _(meet)Lingling when I _(walk)along the street.3.Lily _(listen)to music while Lucy _(read)a sto
14、ry book.4.When the teacher _(come)in,the students _(talk)5.He _(call)you as soon as he_(get)to Guangdong.was cookinggotmetwas walkingwas listeningwas readingcamewere talkingwill callgets精选精选ppt15Homework Write a short article including Write a short article including adverbials as many as possible.adverbials as many as possible.Keep the meanings of the Keep the meanings of the conjunctions in mindconjunctions in mind.Finish the exercises about Finish the exercises about grammar in your booksgrammar in your books精选精选ppt16感谢亲观看此幻灯片，此课件部分内容来源于网络，如有侵权请及时联系我们删除，谢谢配合！
