英语八大时态用法详解一．一般现在时1. 概念：表示经常、反复发生的动作或行为及现在的某种状况。
2. 基本结构：（1）主语+ be动词（is / am / are）+表语（2）主语+ 行为动词的原形或单数第三人称形式+其他（3）There be 句型：There is / are +n. +介词短语is / are 根据n. 的单复数决定。
否定形式：（1）am / is /are + not；（2）谓语动词若为行为动词，则在其前加don’t，如主语为第三人称单数，则用doesn’t，同时行为动词还原为原形。
（3）There is / are not +n. +介词短语一般疑问句：（1）把is / am / are动词放于句首；（2）用助动词do提问，如主语为第三人称单数，则用does，同时还原行为动词；（3））There is / are +n. +介词短语: is / are动词放于句首。
3.标志性时间状语：（1）on + 星期s = every 星期（2）once / twice/ three times a week (month / year …) （3）频度副词always / usually / often / sometimes=at times= (every)once in a while / seldom / never（不绝对）（4）in the mornings / afternoons / evenings = every morning / afternoon/ evening 4.用法：（1）表示经常性或习惯性的动作，常与表示频度的时间状语连用。
如：I leave home for school at 7 every morning.（2）表示客观真理，客观存在或科学事实。
如：The earth moves around the sun.（3）表示格言或警句。
如：Pride goes before a fall. 骄者必败。
注意：此用法如果出现在宾语从句中，即使主句是过去时，从句谓语也要用一般现在时。
如：Columbus proved that the earth is round.（4）表示现在时刻的状态、能力、性格、个性等。
如：I don’t want so much.Ann writes good English but does not speak well.（5）一般现在时表示将来含义①come, go, arrive, leave, start, begin, return的一般现在时可以表示将来，主要用来表示在时间上已确定或安排好的事情。
如：The train leaves at six tomorrow morning.—When does the bus star?—It stars in ten minutes.②在时间或条件状语句中。
如：When Bill comes (不是will come), ask him to wait for me.I’ll write to you as soon as I arrive there.二．一般过去时1. 概念：表示过去某个时间里发生的动作或状态；过去习惯性、经常性的动作或行为。
2. 基本结构：（1）主语+ was / were +表语（2）主语+ 行为动词的过去式+其他（3）There be 句型:There was / were +n. +介词短语（4）主语+could+动词原形（5）主语+used to do sth否定形式：（1）was / were + not；（2）在行为动词前加didn’t，同时还原行为动词。
（3）There was / were not +n. +介词短语（4）主语+could not +动词原形（5）主语+used not to do sth或主语+didn’t use to do sth一般疑问句：（1）was或were放于句首；（2）用助动词do的过去式did 提问，同时还原行为动词；（3）There was / were +n. +介词短语:was或were放于句首；（4）could放于句首；（5）Used主语+ to do sth或Did+主语+use to do sth3.时间状语：（1）last 短语（2）时间段+ago （3）yesterday及yesterday短语（4）at the age of = when sb. was+年龄（5）in one’s teens / twenties（6）固定短语：just now=a moment ago, one day, from then on, at that time, the day before yesterday, before, long before, in the past , in the / early old days, in the ancient days, in the ancient + 国家，long long ago = once upon a time (故事的开头）4. 用法：（1）在确定的过去时间里所发生的动作或存在的状态。
如：Where did you go just now?（2）表示在过去一段时间内，经常性或习惯性的动作。
如：When I was a child, I often played football in the street.注意：used to do sth“过去常常做某事”，表示过去习惯性的动作或状态，但如今已不存在。
如：Mother used not to be so forgetful. 妈妈过去没这么健忘。
（3）用于时间状语从句a. 由when 引导的时间状语从句，从句用一般过去时态，主句用过去进行时态。
如：His mother was cooking when he came back.b. 由since/before 引导的时间状语从句，从句用一般过去时态，主句用现在完成时态。
如：I have made many friends since I came to China.It has been/is 15 years since I was a teacher.It has been/is 15 years before he knew it. 不知不觉15 年过去了。
c. 由when / by the time/ before引导的时间状语从句，从句用一般过去时态，主句用过去完成时态。
如：The plane had taken off when / by the time we arrived at the airport.The Enlish class had begun before I got to school.三．现在进行时1. 概念：表示现阶段或说话时正在进行的动作及行为。
2. 基本结构：主语+ am / is /are + doing否定形式：主语+ am / is / are + not + doing一般疑问句：把be动词放于句首。
3.时间状语：（1）now （2）at this time = at this / the moment （3）Look!/Look at …!（4）Listen! / Listen to …!（5）these days / months / years（6）It is+ 时间点/日期/星期4. 用法：（1）表示现在（指说话人说话时）正在发生的事情。
如：We are waiting for you.（2）表示长期的或重复性的动作，说话时动作未必正在进行。
如：Mr Green is writing another novel. (说话时并不一定在写小说)（3）表示动作的渐变，这样的动词有：get, grow, become, turn, run, go, begin等。
如：The leaves are turning red.It’s getting warmer and warmer.（4）与always, constantly, forever 等词连用，表示反复发生的动作或持续存在的状态，往往带有说话人的主观色彩。
如：You are always changing your mind. 你老是改变主意。
（5）用现在进行时表示将来下列动词come, go, arrive, leave, start, begin, return等瞬间动词的现在进行时可以表示将来。
如：I’m leaving tomorrow.四．过去进行时1. 概念：表示过去某段时间或某一时刻正在发生或进行的行为或动作。
如：My brother fell while he was riding his bicycle and hurt himself.2. 基本结构：主语+ was / were + doing否定形式：主语+ was / were + not + doing一般疑问句：把was或were放于句首。
3. 时间状语：（1）at that time（2）at this time+过去的时间（3）It was+ 时间点/ 日期/ 星期(过去)（4）from A时间to B时间+过去的时间4. 用法：（1）过去进行时表示过去某段时间内持续进行的动作或者事情。
如：We were watching TV from seven to nine last night.（2）过去进行时可以表示在过去某个时间点发生的事情。
时间点可以用介词短语、副词或从句来表示。
如：What was she doing at nine o’clock yesterday? (介词短语表示时间点) She was doing her homework then. （副词表示时间点）When I saw him he was decorating his room. (when从句表示时间点)（3）在复合句中，如果主要动作和背景动作都是延续的或同时发生的，那么主从句的动词都可用过去进行时。
如：When he was waiting for the bus, he was reading a newspaper. (两个动作都是延续的)He was cleaning his car while I was cooking. （两个动作同时进行或主句的动作发生在从句的动作过程中）五．一般将来时1. 概念：表示将要发生的动作或存在的状态及打算、计划或准备做某事。
2. 基本结构：（1）主语+ am / is / are / going to do sth（2）主语+ will do sth（3）主语+ am / is /are t to do sth （4）主语+ am / is /are about to do sth否定形式：（1）主语+ am / is /are + not + going to do sth（2）主语+ will not（won’t）do sth （3）主语+ am / is /are not t to do sth （4）主语+ am / is /are not about to do sth 一般疑问句：（1）am / is / are放于句首；（2）will置于句首。