初中英语八大时态重点及构成.doc

初中英语八大时态一 一般现在时1构成：构成：do/does-V（原形）或 V+s/es2 重点用法：a 客观真理。 Birds fly. b 现阶段习惯性动作。 We have four classes everyday. c 表将来 1）按时间表进行的，飞机、火车、巴士的出发The train for Guangzhou leaves at 7:00. 2) 时间状语从句(till, until, when, as soon as等引导)，条件状语从句（unless, if引导）中表将来。(主 从 ) If it rains tomorrow, we will have to stay at home. 3 标志词：频率副词（often, everyday, on Sundays等）二 一般过去时1 构成：动词过去式did-V-ed(不规则动词表的第二列)2 重点用法：过去的事情 He always went to work by bus last year.3 标志词： I worked here ten years ago.以及表示过去的时间( year, yesterday) I got sick yesterday.三 一般将来时1 构成will/shall do 或 am/is/are going to do -will+ V原形2 重点用法：将来的事情 I will tell him about it. 3 标志词：in+ 一段时间 I will be back in an hour.以及表示将来的时间（ week, tomorrow）四 过去将来时1 构成 would do 或 was/were going to do-would+V（原形）2 重点用法 从过去某一时刻看将来要发生的事情。特别是宾语从句红，主句said, wanted to know动词的过去式时，宾语从句中，表示过去的将来。 Linda said that she _visit her uncle the next Saturday. He wanted to know if they would go there that afternoon五 现在进行时1 构成 is/am/are+Ving2 重点用法：a说话时 Look, the child is playing in the street.b现阶段正在进行的动作。He is building a model these days. c 频繁发生或反复进行的动作。与always等频率副词连用，表不满，赞扬或讨厌。 You are always talking in the class. d come, go, leave, arrive等过渡性动词用现在进行时表将来。My brother is leaving for New York next week.3 标志词：now, these days.六 过去进行时1 构成 was/were doing-was/were+ V-ing 2 重点用法：a 由when 引导的时间状语从句，表示过去某一时刻，A动作发生时，B动作正在进行。则A动作用一般过去时，B动作用过去进行时。The twins were sweeping the floor when the teacher came in. b 由While引导从句，两动作都用过去进行时。Father was watching TV, while Mother was cooking. c 看到有表示过去的时间，并且是具体到时间点。(at four yesterday) He was mending his bike at ten yesterday.3 标志词：表示过去的具体到时间点的时间（ five oclock the day before yesterday.）, that time七 现在完成时1 构成 have/has done-have/has+V-ed2 重点用法：a 过去的动作，但对现在有影响。Would you like to see a film with me？ No, I have seen it. b 从过去开始延续到现在的动作或者状态 I have been studying English for 6 yeats.3 标志词：a already, ever just, yet, since+具体时间或者时间, for+一段时间 B by+具体的时间4 注意事项：a 短暂性动词不能与since+具体时间或者时间或for+一段时间, I have been away from here for three days. （right） I have left here for since （wrong） b have been to表示去过某点，已经回来了。 have gone to 去了某点，但还没回来。八 过去完成时1 构成 had done-had+V-e