小升初英语语法复习－动词时态211.10 对比过去时与现在完成时一）过去时示意过去某时产生的动作或单纯陈述过去的事变，夸大动作；现在完成时为过去产生的，夸大过去的事变对如今的影响，夸大的是影响。
二）过去经常与具体的时候状语连用，而现在完成时平日与模胡的时候状语连用，或无时候状语。
一般过去时的时候状语: yesterday, last week，…ago, in1980, in October, just...11.10 对比过去时与现在完成时一）过去时示意过去某时产生的动作或单纯陈述过去的事变，夸大动作；现在完成时为过去产生的，夸大过去的事变对如今的影响，夸大的是影响。
二）过去经常与具体的时候状语连用，而现在完成时平日与模胡的时候状语连用，或无时候状语。
一般过去时的时候状语:yesterday, last week，…ago, in1980, in October, just now, 具体的时候状语配合的时候状语:this morning, tonight,this April, now, once，before, already, recently，lately现在完成时的时候状语for, since, so far, ever, never, just, yet, till / until, up to now, in past years, always,不确定的时候状语三）现在完成时可示意延续到如今的动作或状况，动词一样平常是延续性的，如live, teach, learn, work, study, know.过去经常用的非持续性动词有come, go, leave, start, die, finish, become, get married等。
举例：I saw this film yesterday.（夸大看的动作产生过了。
）I have seen this film.（夸大对如今的影响，片子的内容已经知道了。
）Why did you get up so early?（夸大起床的动作已产生过了。
）Who hasn't handed in his paper?（夸大有卷子，可能为不公平竞争。
）She has returned from Paris.她已从巴黎回来了。
She returned yesterday.她是昨天回来了。
He has been in the League for three years.(在团内的状况可持续)He has been a League member for three years.(是团员的状况可持续)He joined the League three years ago.( 3年前入团，joined为短暂举动。
)I have finished my homework now.---Will somebody go and get Dr. White?---He's already been sent for.句子中如有过去时的时候副词（如yesterday, last, week, in 1960）时，不能利用现在完成时，要用过去时。
（错）Tom has written a letter to his parents last night.（对）Tom wrote a letter to his parents last night.11.11 用于现在完成时的句型一）It is the first / second time…. that…结构中的从句部份，用现在完成时。
It is the first time that I have visited the city.It was the third time that the boy had been late.二）This is the…that…结构，that 从句要用现在完成时.This is the best film that I've (ever) seen.这是我看过的最佳的片子。
This is the first time (that) I've heard him sing.这是我第一次听他唱歌。
典型例题(一) ---Do you know our town at all?---No, this is the first time I ___ here.A. wasB. have beenC. cameD. am coming谜底B. This is the first time 后面所加从句应为现在完成时，故选B。
(二) ---Have you ____ been to our town before?---No, it's the first time I ___ here.A. even, comeB. even, have comeC. ever, comeD. ever, have come谜底D. ever意为曾经或不管什么时候，反意词为never，此两词常用于完成时。
This is the largest fish I have ever seen. It is / was the first time +that-clause 的句型中，从句要用完成时。
注重：非延续性动词的否定情势可以与示意持续时候的状语连用。
即动作不产生的状况是可以延续的。
（错）I have received his letter for a month.（对）I haven't received his letter for almost a month.小学升初中英语语法温习－动词时态二发表时候：2009-一-22 17:13:25 点击次数：24096次起原：转载11.12 对比since和forSince 用来申明动作肇始时候，for用来申明动作持续时候长度。
I have lived here for more than twenty years.I have lived here since I was born..My aunt has worked in a clinic since 1949.Some new oilfields have been opened up since 1976.I have known Xiao Li since she was a little girl.My brother has been in the Youth League for two years.I have not heard from my uncle for a long time.注重：并不是有for 作为时候状语的句子都用现在完成时。
I worked here for more than twenty years.(我如今已不在这里工作。
)I have worked here for many years.(如今我仍在这里工作。
)小诀窍：当现在完成时+一段时间，这1结构中，咱们用下面的公式转化，很容易就能排除非持续动词在完成时中的误使。
一)(对) Tom has studied Russian for three years.= Tom began to study Russian three years ago, and is still studying it now.二)(错) Harry has got married for six years.= Harry began to get married six years ago, and is still getting married now.明显，第二句纰谬，它应改成Harry got married six years ago.或Harry has been married for six years.11.13 since的4种用法一) since +过去一个时间点(如具体的年、月、日期、钟点、1980, last month, half past six)。
I have been here since 1989.二) since +一段时间+ agoI have been here since five months ago.三) since +从句Great changes have taken place since you left.Considerable time has elapsed since we have been here.四) It is +一段时间+ since从句It is two years since I became a postgraduate student.11.14 持续动词与刹时动词一) 用于完成时的区分持续动词示意经验、阅历；刹时动词示意举动的结果，不能与示意段的时候状语连用。
He has completed the work.他已完成了那项工作。
(表效果)I've known him since then. 我从那时起就了解他了。
(表阅历)二)用于till / until从句的差别持续动词用于确定句，示意"做……直到……" 刹时动词用于否定句，示意"到……，才……"He didn't come back until ten o'clock.他到10 点才回来。
He slept until ten o'clock.他不停睡到10点。
典型例题1. You don't need to describe her. I ___ her several times.A. had metB. have metC. metD. meet谜底B. 起首本题后句夸大对如今的影响，我晓得她的样子，你不用描写。
再次，several times 通知为频频产生的动作，因而用现在完成时。
2.---I'm sorry to keep you waiting.---Oh, not at all. I ___ here only a few minutes.A. have beenB. had beenC. wasD. will be谜底A. 守候的动作由过去入手下手，延续到如今，运用现在完成时。
11.15 过去完成时一）概念：示意过去的过去----|-------|-----|---->其组成是had +过去分词组成。
当时之前当时如今二）用法a.在told, said, knew, heard, thought等动词后的宾语从句。