时态用法讲解.doc

时态用法讲解 一般过去时 一．表示过去所发生的一次情况(注意划线单词的时态，下同。)。如： 1.--Where have you put the recorder? I cant see it anywhere. --I put it right here.But now its gone. 2.That suit cost over 60 dolloars. 二. 表示过去存在的状态。如： 1. I never thought you were here in Beijing. 2.--We could have walked to the station;it was so near. --Yes.A taxi wasn’t at all necessary. A.wasnt B.hadnt been C.wouldnt be D.wont be 三．表示发生在过去的一个状态可以同表示一段时间的状语连用。如： 1. He lived here for a few years and then left. 2. She stayed here for only a few days. 四．表示刚刚过去的想法或看法。这种想法或看法往往不符合实际情况，因受主句谓语动词的影响，宾语从句的谓语动词也要用相应的过去时态（过去完成时,一般过去时，过去将来时，过去进行时等），尽管这时宾语从句所要表示的情况是现在的情况。如： 1. The pen I thought I had lost is on my desk,right under my nose. 2. Hello! I didn’t know you were in London.How long have you been here? 过去进行时 一. 表示过去某一个时刻正在进行的动作，强调动作当时正在进行的过程中。如： 1.I first met Lisa three years ago.She was working at a radio shop at that time. A.has worked B.was working C.had been working D.had worked 2.The reporter said that the UFO was travelling from east to west when he saw it. 二. 表示过去某一段时间内正在进行的动作，强调动作在这段时间内正在进行，并且动词并没有结束。如：Shirley was writing a book about China last year but I dont know whether she has finished it or not. 三. 表示刚刚过去的一个暂时性的或短暂的动作。在对话中，我们常用这种时态来表示刚刚发生的事情并不是自己有意识的行为。如： 1.--Hey,look where are you going? --Oh,Im terribly sorry I wasn’t noticing. 四. while、as引导的状语从句中常用过去进行时态，强调动作正在发生或进行的过程中。另外，when用作并列连词时，它前面的分句常用过去进行时，后面的分句则多用一般过去时，表示某个动作正在进行的过程中，另一个意想不到的事情发生了。如： 1. As she was reading the newspaper,Granny fell asleep. 2. My brother fell off while he was riding his bicyle and hurt himself.(MET89) A.fell; was riding B.fell; were riding C.had fallen; rode D.had fallen; was riding 过去完成时 一．过去完成体表示先于过去某一时间的事件或状态，即过去的过去。这一事件或状态可以在过去某一时间以前已经完成，也可能从过去的过去某一时间一直延续到过去某一时间（甚至还可能延续下去，但与现在时间无关）。如：He went to see his boss and told him what had happened. 2. My teacher had been with me several weeks before I understood that everything has a name. 3. I