一般过去时和过去完成时选编.ppt

Unit 3 Grammar;The Past Simple Tense（一般过去时）;二，基本用法 1表示在过去某个时间所发生的动作或所处的状态。常与这些时间副词连用 (1). yesterday或以其构成的短语：yesterday morning(afternoon, evening)等； (2). 由―last+一时间名词构成的短语：last night, last year (winter, month, week)等； (3). 由―时间段+ago构成的短语：a moment ago, a short time ago, an hour ago等； (4). 其它：in 1989, just now, at that moment,at that time, the other day等 如：He was here just now. 他刚才还在这里。 What did you do yesterday? 你昨天做了什么事？;2在过去一段时间内的经常性或习惯性动作。常与often，always，usually等频度副词 连用。 如Sally often does some reading in the morning. We often played together when we were children. 我们小时候常在一起玩。 注：表示过去经常发生的动作还可用used to 和would。 如：He used to smoke a lot, but he doesn’t now. 他过去经常抽烟，但现在不抽了。;3表示主语过去的特征或性格。 如：At that time she was very good at English. 那时她英语学得很好;注意 句型：1.It is time for sb.to do sth 到……时间了 该……了. 例如：It is time for you to go to bed.你该睡觉了. It is time that sb.did sth.时间已迟了 早该……了 例如：It is time you went to bed.你早该睡觉了. 2. would （had） rather sb.did sth.表示宁愿某人做某事. 例如：Id rather you came tomorrow.还是明天来吧. ;三、基本结构 ;The Past Perfect Tense （过去完成时）;二、构成 过去完成时由“助动词had+过去分词”构成 。 1）We had learnt 30 lessons by the end of last month.到上个月末为止,我们已经学了30课. 2）He said we hadn’t seen each other since I left Beijing.自从我离开北京,我们还没见过面.;二、基本用法 1. 由时间状语来判定 与过去完成时连用的时间状语有： （ 1 ） by + 过去的时间点。 如： I had finished reading the novel by nine oclock last night. （ 2） before + 过去的时间点。 如： They had planted six hundred trees before last Wednesday. ;2. 由“过去的过去”的定义来判定。 1 ）宾语从句中，当宾语从句的主句为一般过去时，且从句的动作先于主句的动作时，从句要用过去完成时。 在told, said, knew, heard, thought等动词后的宾语从句。 如： She said that she had seen the film before. 2 ）状语从句中 ， 在时间、条件、原因、方式等状语从句中，主、从句的动作发生有先后关系，动作在前的，要用过去完成时，动作在后的要用一般过去时。 如 After he had finished his homework, he went to bed. 3）表示意向的动词，如hope, wish, expect, think, intend, mean, suppose等，用过去完成时表示原本…，未能… We had hoped that you would come, but you didnt. ;过去完成时与一般过去时的区别 1. 时间状语不同：过去完成时在时间上强调“过去的过去”；而一般过去时只强调过去某一特定的时间。 They had arrived at the station