初中三年级英语课件过去进行时.ppt

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1、The Past Continuous Tense 过去进行时的构成过去进行时的构成:was/were + v-ing 表示在过去某一时刻或某一段时间正在进表示在过去某一时刻或某一段时间正在进行的动作。这一特定的过去时间除有上下行的动作。这一特定的过去时间除有上下文暗示外，一般用时间状语来表示。文暗示外，一般用时间状语来表示。e.g. (1) -What was he doing when the UFO arrived ? -He was sleeping late when it arrived. (2) Many people remember what they were doing

2、on April 4, 1968. （3） What were you doing at 8 oclock yesterday? 句式：句式： 肯定：肯定： I / He / She / It was working. We / You /They were working. 否定：否定： I / He / She / It was not working. We /You / They were not working. 疑问句及答语：疑问句及答语： Was I working ? Yes ,You were . No ,You werent . Were you working ? Yes

3、 , I was . No , I wasnt . Was he / she / it working ? Yes , he / she / it was . No , he / she / it wasnt . Were we / you / they working ? Yes , you / we / they were . No, you / we / they werent . wasnt = was not werent = were not 现在分词的构成现在分词的构成 1）一般动词在词尾加）一般动词在词尾加-ing，读，读i，如如go - going。 2）以不发音字母）以不发

4、音字母e结尾的动词，先去掉结尾的动词，先去掉e，再，再加加-ing。come - coming make - making write - writing 3）以重读闭音节结尾的动词，如果末尾以一）以重读闭音节结尾的动词，如果末尾以一个辅音字母结尾，应先双写这个字母，再加个辅音字母结尾，应先双写这个字母，再加ing，x和和w结尾的除外。结尾的除外。 如如:get - getting swim - swimming show - showing 4）以字母）以字母ie结尾的动词，变结尾的动词，变ie为为y，再加，再加ing。 diedying lielying 5）以元音字母加）以元音字母加e结

5、尾，或以结尾，或以e结尾，且结尾，且e发发音的动词，直接加音的动词，直接加- ing 。 see - seeing be - being 过去进行时和一般过去时的区别过去进行时和一般过去时的区别 1）过去进行时表示过去某一时刻正在进行的）过去进行时表示过去某一时刻正在进行的动作，而一般过去时则表示在过去某个时间发生动作，而一般过去时则表示在过去某个时间发生过的的动作或存在的状态。如：过的的动作或存在的状态。如： They were writing letters to their friends last night . 昨晚他们在写信给他们的朋友。（没有说明信昨晚他们在写信给他们的朋友。（没

6、有说明信是否写完）是否写完） They wrote letters to their friends last night . 他们昨晚写了信给他们的朋友。（表达了他们他们昨晚写了信给他们的朋友。（表达了他们已写好的意思，整个写的过程已完成。）已写好的意思，整个写的过程已完成。）When和和while引导的时间状语从句引导的时间状语从句在过去进行时中的应用在过去进行时中的应用 1. when可指时间点，又可指时间段，从可指时间点，又可指时间段，从句中可用延续性动词，也可用非延续性动句中可用延续性动词，也可用非延续性动词。词。 2. while总是指一个时间段，从句中必须总是指一个时间段，从句中

7、必须用延续性动词。用延续性动词。延续性动词和非延续性动词延续性动词和非延续性动词 延续性动词指动作可以延续一段时间，而延续性动词指动作可以延续一段时间，而不是瞬间结束。不是瞬间结束。 如：如：work、study、drink、eat等。等。 非延续性动词指动作极为短暂，瞬间结束。非延续性动词指动作极为短暂，瞬间结束。 如：如：start、begin、hit、jump、knock等。等。 在本单元中，出现了以在本单元中，出现了以when和和while引导的引导的 时间状语从句。时间状语从句。 when表示表示“当当的时候的时候”。从句。从句中既可用延续性动词，又可用非延续性动词，中既可用延续性动

8、词，又可用非延续性动词，这些动词既可以表示动作，又可表示状态。这些动词既可以表示动作，又可表示状态。从句中的动作既可和主句的动作同时发生，从句中的动作既可和主句的动作同时发生，又可在主句的动作又可在主句的动作 Mary was having dinner when I saw her . The boy was still sleeping when his mother got home yesterday morning . while表示表示“在在的时候的时候”、“在在期期间间”。它强调主句的动作与从句的动作同时发生或。它强调主句的动作与从句的动作同时发生或主句的动作发生在从句的动作过程

9、中。主句的动作发生在从句的动作过程中。while从句从句中必须是表示动作或状态的延续性动词。如：中必须是表示动作或状态的延续性动词。如： The weather was fine while we were in Beijing . She called while I was out . 如果主句的动作在从句的动作过程中发生，从句如果主句的动作在从句的动作过程中发生，从句常用进行时。如。常用进行时。如。 While we were swimming someone stole our clothes . Dont talk so loud while others are working .

10、3. 使用进行时态的注意事项使用进行时态的注意事项 1）一些动词，如）一些动词，如see、hear、love、like、know、remember；understand、have等表示感情、知觉和状态的词，一般等表示感情、知觉和状态的词，一般不用于进行时态。不用于进行时态。 2）在）在there和和here引起的句子中，常用引起的句子中，常用一般现在时代替现在进行时。一般现在时代替现在进行时。 eg. Here comes the bus . There goes the bell .ExercisesChoose “when” or “while” to fill in the blanks

11、.(1)Iwaswalkinginthestreet_theaccidenthappened.(2)_youhaveameeting,youshouldturnedoffyourmobilephone.(3)_youhavePEclasses,youshouldwearsportsshoes.(4)_Iwasdoingmyhomework,thetelephonerang.(5)_itwasraining,theplanetookoff.(6)_theteacherwasspeakingtoclass,Nickstoodupsuddenly.(7)Myfatherwascooking_mymo

12、therwaswatchingTVwhenwhenwhenwhilewhilewhilewhile 8. _ the alien was in the museum , I called the police . 9. The boy was walking down the street _ a UFO landed . 10. _ the alien was visiting the museum , the boy called the TV station . 11. I was cleaning my room _ the fire broke out . 12. _ Linda w

13、as shouting his name , some people looked at her . 13. _ Linda finally saw Davy , he was jumping with a dog .WhilewhereWhilewhenWhileWhenExercises 1. He _ (draw) at eight yesterday evening. 2. The girl _ (shop) when her friend _ (see) her. 3. While he _ (cook) dinner, his friend _ (get) out of the shower. 4. He saw the UFO while he _ (walk) down the street.was drawingwas shopping sawwas cookinggotwas walkingThank you for listening!