一般过去时 过去进行时 过去完成时三种语法精准讲授.pptxVIP

一般过去时过去进行时过去完成时 一般过去时 句子结构 be → was be → were do → did 信号词 ago , yesterday , last year , last month , once 一般过去时 （一）一般过去时 1）表示在过去某时刻发生的动作或存在的状态。 Eg : I was born in 1990. 2）表示在过去一段时间内，经常性或习惯性的动作。 Eg : When I was a child ,I often watched cartoon series. 3）表示过去发生的一连串动作。 Eg : The monkey jumped off the tree , picked up a big stone and threw it at us. 4）一般过去时也可以与表示一段时间的状语连用。强调在过去一段时间做了某事。 Eg : Mr Li is living in the countryside now , but he once worked in Nanjing for more than thirty years. 过去进行时 句子结构 was/were+doing 信号词 At 8 yesterday evening/then/at that time/主句（过去进行时）+从句（过去时） 过去进行时 （二）过去进行时 1）表示过去某一时刻或某一段时间内正在进行的动作。 Eg : He was watching TV at 8 o’clock last night. 2）过去进行时的主要用法是描述一件事发生的背景。 Eg : The sun was shining , the wind was blowing , and a group of soldiers were marching. Eg： He hurt his leg when he was playing basketball. 把腿弄伤发生在打篮球的过程中，就是弄伤腿的背景 3）一个长动作延续的时候，另一个短动作发生。长动作用过去进行时表示，短动作用一般过去时表示。 Eg : I was doing my homework when someone knocked at the door. 区分 一般过去时表示在过去某时发生的动作或存在的状态强调的是动作的发生、结束或完成。 过去进行时表示某一时刻或过去某一段时间正在进行的,强调的是动作的持续性 Eg： They were building a bridge last winter.(可能还未建成) They built a bridge last winter.（已经建成） 过去完成时 1.过去完成时既可表示过去某个时间或动作之前所发生的事情(常用时间状语有already, before, ever, just, never, still, yet) 2.可表示过去某个时间或动作之前所发生的动作一直持续到过去某个时间(常接时间状语：since +时间点, for + 时间段)。 过去完成时 句子结构： “主语+had + 过去分词（done)” Eg When I got to the station, the train had left. 当我到达车站时，火车已经开走了。 例句 When I got home ,mom had cooked supper. 当我回到家，妈妈已经做好晚餐了。 We had learnt fifteen lessons by last week. 到上周为止，我们学完了十五篇课文。 他走之前在这儿呆了两天。 He had stayed here for two days before he left. 他说他十岁起就住在那儿了。 He said that he had lived there since he was ten. 过去完成时的运用 (1) 与过去完成时连用的时间状语可以多种多样，使用它的主要依据是看其是否发生在“过去的过去”。如： 在来这儿之前我学过一些英语。 He had learnt some English before I went here. 到去年他已经写了三篇故事。 He had written three stories by last year. 当他到那儿时，我们已经把房子弄干净了。 We had cleaned the room when he got there. 他把事做完之后，就去哪儿了。 He went there after he had fin