1一般目前时的使用方法
1)表示常常性或习惯性的动作，常与表示频度的时间状语连用。 例：every…, sometimes,ofen,always,usually, twice a week, at…, on Sunday等。I leave home for school at 7 every morning.He watches Tv once a week .2)表示常见真理，客观存在，科学事实。The earth moves around the sun. Shanghailies in the east ofChina.3)格言或警句。Pride goes before a fall. 骄者必败。注意：此使用方法假如出目前宾语从句中，即便主句是过去时，从句谓语也要用一般目前时。例：Columbus proved that the earth is round..4)表示目前时刻的状况、能力、个性或喜好。I don't want so much. Ann Wang writes good English but does not speak well.比较：Now I put the sugar in the cup. I am doing my homework now.第一句用一般目前时，用于操作演示或指导说明的示范性动作，表示言行的瞬间动作。再如：Now watch me, I switch on the current and stand back.第二句中的now是进行时的标志，表示正在进行的动作的客观情况，所将来句用一般目前时。2一般过去时的使用方法
1）在确定的过去时间里所发生的动作或存在的状况。时间状语有：yesterday, an hour ago, the other day, in 1982，yesterday morning ，last night , a moment ago , a week ago, three years ago… just now,等。Where did you go just now?2）表示在过去一段时间内，常常性或习惯性的动作。When I was a child, I often played football in the street.Whenever the Browns went during their visit, they were given a warm welcome. 3）句型：It is time for sb. to do sth "到……时间了" "该……了"It is time sb. did sth. "时间已迟了" "早该……了"It is time for you to go to bed. 你该睡觉了。It is time you went to bed. 你早该睡觉了。4) wish, wonder, think, hope等用过去时，作试探性的询问、请求、建议等。I thought you might have some.我以为你想要一些。注意：一般过去时表示的动作或状况都已成为过去，现已不复存在。Christine was an invalid all her life. Mrs. Darby lived inKentuckyfor seven years.3目前进行时
1） 表示目前正在发生的事情。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。Mr. Green is writing another novel. She is learning piano under Mr. Smith.3）瞬时动词的进行时肯定表示以后的意思。瞬时动词：come,go,arrive,leave,finish,end,start,begin等。We are arriving atLondon.持续动词的进行时需要加表示以后的时间状语或有以后的语境时才能表以后。I am travelling next month.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况，总是带有说话人的主观色彩。You are always changing your mind.4过去进行时
1）过去进行时主要表示过去某个时刻正在进行的动作，常和表示过去的状语连用。比如：（just）then那时，当时；at this/that time在这/那时yesterday afternoon昨天下午；at nine在九点；last night昨晚；（at）this time yesterday在昨天这时但在不少状况下，没表示时间的状语，这个时候需要通过上下文来表示。What were you doing at nine last night?昨晚九点的时候，你在干什么？I was watching TV at home yesterday afternoon.我昨天下午正在家看电视。They were playing football at this time yesterday.昨天这时他们在踢球。2）过去进行时也可以表示过去某一段时间内正在进行的动作。常与those days, the whole morning, from 8:00 to 12:00 last night等时间状语连用。From 1983 to 1998 , he was teaching at Yale .从1983到1998年，他正在耶鲁大学教书。They were building a bridge last winter .去年冬季他们正在造一座桥。3）过去进行时表示过去将要发生的动作。目前进行时可以表示以后的动作，同样，过去进行时也可以表示从过去某时看来将要发生的动作，常用在间接引语中。Lucy arrived inBeijinglast Friday. But she was leaving for Hong Kong the next morning.上周五Lucy到达北京，但第二天早晨就要动身去香港了。She asked him if he was coming back for lunch.她问他午饭是不是筹备回来吃。4）过去进行时与频度副词always forever，continually，constantly等连用时表示过去常常反复的动作，常常带有埋怨、讨厌、赞扬或喜欢等情绪。My sister was always forgetting things.He was always helping others.5一般以后时
1）表示以后某个时间要发生的动作或存在的状况，也表示以后常常或重复发生的动作。时间状语：tomorrow , soon , next Monday , next year , next weekend , this afternoon , this evening……2）will do表示主观意愿做某事。I will see a movie this morning.表示客观的不以人的意志为转移的客观以后。Fish will die without water.表示临时决定。——Mom, where is the newspaper?——Wait a moment. I will get it for you.3) be going to +do表示计划，安排要发生的事。The play is going to be produced next month。表示有征兆要发生的事Look at the dark clouds.There is going to be a storm.6过去以后时
立足于过去某一时刻，从过去看以后，常用于宾语从句中。时间状语：the next day,the following month,etc.
He said he would go toBeijingtheI didn't know if she was going to come。Wang Lei said that she was going to visit her uncle next Saterday。
7目前完成时
1）表示过去发生或已经完成的某一动作对目前导致的影响或结果。标志词：already, yet, just, ever, never, beforeI have finished my homework.我做完家庭作业了。2）表示：过去已经开始，持续到目前的动作或状况，并且大概继续下去。标志词：for, since, since…agoI have studied English for six years.我已经学了六年英语了。3）have/has gone to、have/has been to和have/has been in有什么区别have/ has gone to去了，在去某地的路上或在某地，人还未回来have/ has been to过去去过，人已经回来了have/ has been in已经在，常与一段时间连用如：He has been to Shenyang before.他以前曾去过沈阳。He has been inShenyangfor ten years.他在沈阳10年了。Has he gone toShenyang?他去沈阳了吗?4）非延续性动词不可以用“目前完成时+表示一段时间的状语”的句型中。这种动词有：come, go, start, leave, die, buy, finish, join, borrow, sTOP等。但可以用表示持续状况的相应的延续性动词替换句中的非延续性性动词。arrive, come→be here, die→be dead finish, end→be over go out→be outjoin→be in borrow→keep finish/end→be overclose→be closed leave, move→be awayfall asleep→be asleep8过去完成时
1）以过去某个时间为标准，在此以前发生的动作或行为，或在过去某动作之前完成的行为，即“过去的过去”。As soon as we got to the station, the train had left.2）在told, said, knew, heard, thought等动词后的宾语从句。She said she had never been toParis.3)过去完成时的时间状语before, by, until , when, after, once, as soon as。He said that he had learned some English before.By the time he was twelve,Edisonhad began to make a living by himself.Tom was disappointed that most of the guests had left when he arrived at the party.
