1、八年级下册八年级下册5单元单元 过过 去去 进进 行行 时时 The Past Continue Tense 过去进行时的定义 1 过去进行时的结构 2 3 过去进行时的标志词 4 现在分词的变化规则 5 when和while用法辨析 一般现在时和过去进行时辨析 6 过去进行过去进行时时的的定定义义 1 过过去进行时表示去进行时表示过去某一时刻或某一段时间内过去某一时刻或某一段时间内正在进行或正在进行或 发生的动作发生的动作。 通常句子一定会有一个“通常句子一定会有一个“表示过去某个时间点表示过去某个时间点”的状语。”的状语。 如:如: She was reading a book at 10
2、 a.m. yesterday morning. He was shopping from 8 to 9 last night . 过去进行过去进行时时的结构的结构 2 S(主语) + was / were +v.-ing + 其它。 否定否定 形式形式 问句问句 形式形式 主语主语+ was/were + not + doing Was/Were+主主+doing? 主语主语+was/were + doing He was sleeping at that time. He wasnt sleeping at that time. Was he sleeping at that time?
3、肯定肯定 形式形式 过去进行时用法歌诀过去进行时用法歌诀 过去进行时,过去动作正进行,过去进行时,过去动作正进行, 肯定句,主肯定句,主+was/were doing; 否定句,否定句,be后后not填上去;填上去; 疑问句,疑问句,was/were提到主语前。提到主语前。 过去进行过去进行时时的标志词的标志词 3 then, at that time, this time yesterday, at 5 oclock last night, all night, all the morning, from 7:00 to 9:00 yesterday; when 或或 while 引导的时间
4、状语从句引导的时间状语从句 1.I was singing songs yesterday morning. 否定句:否定句:_ 一般疑问句:一般疑问句:_ 2. They were drawing pictures when the teacher came in. 否定句:否定句:_ 一般疑问句:一般疑问句:_ 3. She was washing the window when the telephone rang. 否定句:否定句:_ 一般疑问句:一般疑问句:_ Exercise 现在分词的变化规则(直去双变)现在分词的变化规则(直去双变) 4 口诀口诀 规则规则 例子例子 直 1.
5、一般情况下,直接在动词后加-ing; play playing 去 2. 动词以不发音的-e结尾,要去-e加- ing; take taking 双 3.重读闭音节结尾末尾只有一个辅音字 母的动词,要双写词尾的辅音字母, 再加-ing; cut cutting 变 4. 以-ie结尾的动词,把ie变成y再加-ing。 lie lying 1.表示两个动作表示两个动作同时发生同时发生,常用,常用while 连接,有“以此同时”之意。连接,有“以此同时”之意。 例如:例如: While I was reading , you were writing . 2.表示当一个动作发生时,另一个动作正在进
6、行。这时延续的动作表示当一个动作发生时,另一个动作正在进行。这时延续的动作 用过去进行时,短暂的动作用一般过去时,而且这时只能用用过去进行时,短暂的动作用一般过去时,而且这时只能用when. 总结:总结: 过去进行时过去进行时+ while+过去进行时过去进行时(主长从长,多用(主长从长,多用while) My mom was cooking while my father was watching TV . 过去进行时过去进行时+when+一般过去时一般过去时(主长从短,必用(主长从短,必用when) I was reading a book when he came in . (有“这时”
7、之意)(有“这时”之意) 一般过去时一般过去时+whenwhile+过去进行时过去进行时(主短从长,(主短从长,when或或while) Sally took a photo of her friends whenwhile they were playing computer games . when和while用法辨析 5 一般现在时和过去进行时辨析一般现在时和过去进行时辨析 6 (1).用法不同 过去进行时过去进行时 一般过去时一般过去时 1. 表示动作在持续或未完成。 1. 表示某一动作已经完成。 2. 表示动作反复地进行。 2. 表示只做一次动作。 She was writing a
8、 letter to her friend at eight last night. She wrote a letter to her friend last night. (信不一定写完) (信写完了) She waved to me. She was waving to me. (挥了挥手) (反复挥手) (1).用用法不同法不同 (2).标标志词不同志词不同 过去进行时过去进行时 一般过去时一般过去时 过去时间点:过去时间点:at that time, this time yesterday, at 7 oclock yesterday evening等。等。 过去时间点:过去时间点:
9、just now, yesterday, this morning, three years ago等。等。 过去时间段:过去时间段:from six to nine yesterday, from morning till night, all those days等。等。 过去时间段:过去时间段:in the past, in + 过去的年份过去的年份, last week, once upon a time等。等。 We were having supper at this time yesterday. It was raining all those days. I was read
10、ing English while my mother was cooking breakfast. (过去进行时)(过去进行时) I lived in Beijing three years ago. The first Olympic Games happened in 1896. Anny used to be short, but she becomes taller now. (一般过去时)(一般过去时) 【典例典例1】Little Tom _ computer games when his mother got home. A. is playing B. plays C. was
11、 playing D. playing 考查时态考查时态。句意:当妈妈到家的时候句意:当妈妈到家的时候,小汤姆正在玩电小汤姆正在玩电 脑游戏脑游戏。when引导时间状语从句引导时间状语从句,主句多用进行时主句多用进行时, 时间发生在过去时间发生在过去,故用过去进行时故用过去进行时。 【典例典例2】 Turn off the water while you _ your teeth or washing your hands. A. were brushing B. brush C. are brushing D. brushed 考查时态考查时态。句意:当你刷牙或洗手的时候句意:当你刷牙或洗手的时候,请关掉水龙头请关掉水龙头。 while引导时间状语从句引导时间状语从句,时态保持一致时态保持一致,brushing与与 washing并列;习惯的动作并列;习惯的动作,故选现在进行时故选现在进行时。