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关于英语那些你不知道的事都在这里http:/m.meten.com/test/quwen.aspx?tid=16-73675-0for有时用来引出动词不定式的逻辑主语,常翻译成“对于而言”。如：Its too hard for me to finish the work in only one hour.(让我在区区一个小时内完成这项工作太难了)/ The house is big enough for 10 men to live in.(房子够大的可以容10个人住)of有时用来表示后面的人物正好是前面的表语的逻辑主语。如：Its very nice/kind of you to do so.(你这么做真是太好了)介词有时会与它的宾语分离,而且宾语前置。 当宾语是疑问词时。Who are you talking about?(你们在谈论谁？) 宾语在从句中当连接词时。He has a younger brother who he must take good care of.(他有一个需要他照顾的小弟。) / Do you know who our teacher is talking with over there?(你知道我们的老师在那边和什么人谈话吗？) 动词不定式作定语且该动词为不及物动词,后面有介词。I finally found a chair to sit on.(我最终找到了一张椅子坐。)(5) 记住一些固定词组：arrive at/in(到达),on foot(步行),notat all(根本不),to the north of(在以北),in the east of(在的东部),in the night(在夜间),at night(在晚上),be afraid of(害怕),be full of(充满/ 装满.),be filled with(充满/ 装满.),be good/bad for(对有益/有害),be made of(由做成),be made from(由制造),play with(玩耍),look out of(朝外面看),at the end of(在末梢/结束时),by the end of(不迟于/到末为止),with the help of或with ones help(在的帮助下),look after(照料),look for(寻找),on a bike(=by bike)骑车, help sb. with(帮某人做),get on (well) with(与某人相处融洽),等等。6、某些介词的用法辨析：时间或地点介词in、on、at的用法区别：表示时间时, in表示在一段时间里(在将来时句子中则表示在一段时间之后), on表示在具体的某一天或者某天的上下午等, at表示在某个时刻或者瞬间；表示地点时, in表示在某个范围之内, on表示在某个平面上或与一个面相接触,at则表示在某个具体的场所或地点。如：He was born on the morning of May 10th.(他出生于五月十日的早晨)/ I usually get up at 7：00in the morning.(我通常在早上的七点钟起床) / His glasses are right on his nose.(他的眼镜就架在他的鼻子上)/ He is at the cinemaat the moment.(此刻他正在电影院)after与in表示时间的用法区别：“after+(具体时刻/从句)”表示“在时刻之后”常用于一般时态；“in+(一段时间)”表示“在(多久)之后”,常用于将来时态。如：He said that he would be here after 6：00.(他说他六点钟之后会来这儿)/ My father is coming back from England in about a month.(我父亲大约一个月以后从英国回来)since与for表示时间的用法区别：“since+(具体时刻/that-从句)”表示“自从起一直到现在”,“for +(一段斶间)”表示“总共有之久”,都常用于完成时态；如：Uncle Li has worked in this factory since 1970.(李叔叔自从1970年起就在这家工厂工作了)/ Uncle Li has worked in this factory for over 30 years. (李叔叔在这家工厂已经工作了30多年)by、in与with表示方式的用法区别：都可以表示“工具、手段”,但是by主要表示“乘坐”某个交通工具或“以方式”,在被动句中可以表示动作的执行者；in表示“使用”某种语言/文字,with表示“使用”某个具体的工具、手段。如：We see with our eyes and walk with our feet.(我们用眼睛看东西,用双脚走路)/ Please write that article(文章)in English.(请你用英语写那篇文章)/ Lets go to the zoo by taxi.(我们打的去动物园吧。)/ It was written by Lao She.(那是老舍写的)about与on的用法区别：都可以表示“有关”,但是about的意义比较广,而on主要表示“有关(专题/课程)”。如：Tom is going to give a talk on the history of America.(汤姆要作一个美国历史的报告)/ They are very excited talking about the coming field trip.(他们兴致勃勃地谈论着即将来到的野外旅游)through与across、over的用法区别：through指“穿过(门洞/人群/树林)”；across和over可以指“跨越(街道/河流)”,可互换,但是表示“翻过”时只能用over. 如：Just then a rat (鼠)ran across the road.(就在那时一只老鼠跑过路面)/ There is a bridge across/over the river.(河上有座桥)/ They climbed over the mountain and arrived there ahead of time.(他们翻过大山提前到达了那里)/ The visitors went through a big gate into another park.(参观者们穿过一个大门来到另一个公园)(7)as与like的区别：两个词都表示“像”,但是as译为“作为”,表示的是职业、职务、作用等事实,而like译为“像一样”,表示外表,不是事实。如：Let me speak to you as a father.(我以父亲的身份和你讲话。)(说话者是听者的父亲) / Let me speak to you like a father.(让我像一位父亲一样和你讲话)(说话者不是听者的父亲)(8)at the end of、by the end of、to the end、in the end的用法区别：at the end of既可以表示时间也可以表示地点,译为“在末；在尽头”,常与过去时连用；by the end of只能表示时间,译为“在前；到为止”,常用于过去完成时； in the end与at last基本等义,表示“终于、最后”,通常用于过去时；to the end译为“到的终点为止”,前面往往有表示运动或连续性的动词。如：By the end of last term we had learned 16 units of Book III.(到上学期期末我们已经学习了第三册16个单元)/ At the end of the road you can find a big white house with brown windows.(在路的尽头你能找到一幢有棕色窗户的白房子)/ They left for Beijing at the end of last week.(上周末他们动身去了北京)/ In the end he succeeded in the final exams.(他最终在期末考试中考及格了)/ We should go on with the work to the end.(我们应该把工作干到底)/ Follow this road to the end and you will see a post office.(沿这条路走到底就能看见一家邮电局)(9)for a moment、for the moment、in a moment、at the moment的区别：for a moment“一会儿、片刻”(=for a while),常与持续性动词连用；for the moment“暂时、目前”,常用于现在时；in a moment“一会儿、立即、马上”(=soon; in a few minutes),一般用于将来时；at the moment“此刻,眼下”(=now),用于现在进行时。如：Please wait for a moment.(请稍等)/ Lets leave things as they are for the moment.(暂时就维持现状吧！) / Ill come back in a moment.(我过会儿回来)/ I am very busy at the moment.(眼下我很忙)(10)but的问题：用介词but引出另一个动词时,要注意：如果前面有do,后面就用原形动词,前面没有do时,后面的动词要加to。如：I could do nothing but wait.(我什么也做不了只能等) / They had no choice(选择) but to fight.(他们没有选择只有战斗)(11)in front of与in the front of：in front of“在的前面”, 与in the front of“在的前部”。如：A car was parking in front of the hall.(大厅跟前停着一辆汽车)/ In the front of the hall stood a big desk.(大厅前部立着一个大讲台)(12)except与besides的区别：except“除了”,表示排除掉某人物,即不包含；而besides“除了”则表示包含,即“不仅又”。如：Everyone went to the Palace Museumexcept Tom.(除了Tom,大家都去了故宫博物院)(Tom没有去故宫)/Besides Chinese he also studied many other subjects.(除了汉语之外,他还学其他许多功课)(“汉语”也是他学的功课之一)八、动词1、动词的分类：类别意义例句实义动词含有实在的意义,表示动作或状态,在句子中能独立作谓语。She has some bananas. 她吃些香蕉。They eat a lot of potatoes. 他们常吃土豆。Im reading an English book now.我现在正看一本英文书。连系动词本身有一定的词义,但不能独立作谓语,必须和表语一起构成谓语。His father is a teacher.他父亲是教师。Twins usually look the same.双胞胎通常看起来一样。The teacher became very angry.老师变得很生气。助动词本身没有词义,不能独立作谓语,只能和主要动词一起构成谓语动词,用来表示否定、疑问、时态、语态或其它语法形式,助动词自身有人称、单复数和时态的变化。He doesnt speak English. 他不说英语。We are playing basketball. 我们在打篮球。Do you have a brother? 你有兄弟吗？情态动词本身有一定的意义,不能独立作谓语,只能和主要动词一起构成谓语动词,表示说话人的语气和情态。情态动词没有人称和单复数的变化,有些情态动词有过去式。You can keep the books for two weeks.这些书你可以借两个星期。May I smoke here? 我可以在这儿抽烟吗？We must go now. 我们现在得走了。重要注解：(1) 关于实义动词：英语的实义动词又可分为及物动词和不及物动词两大类：后面必须跟宾语意义才完整的叫及物动词；本身意义完整,后面不需跟宾语的叫不及物动词。有些动词通常只作不及物动词。如：go,come,happen,lie,listen,rise,arrive,hall等。有些动词通常用作及物动词。如：say, raise, lay, find, buy等。大多数动词可以兼作及物动词和不及物动词。如：study, sing等。有些动词作及物动词与作不及物动词时的意义有所不同。如：know, wash等。有些动词常和介词、副词或其它词类一起构成固定词组,形成短语动词。如：listen,reply,wait,look.(2) 关于连系动词： 连系动词用来连接主语和表语,连系动词后面常为形容词。 常见的连系动词有：be、become、look、feel、sound、smell、taste、seem、turn、grow、get、 go、fall、sit、stand、lie 等。 有些连系动词来源于实义动词,意思也跟着变化：look(看看起来)、feel(感觉、摸感到)、smell(闻、嗅闻起来)、taste(尝尝起来)、turn(翻转、转动变得)、grow(生长变得)、get(得到、到达变得)、go(去变得),所不同的是,作为实义动词时,后面不能跟形容词。注释 become、get、go、be、grow、turn的用法区别：become表示“变成”,比较正式,通常不用将来时表示动作已经完成。get也表示动作已经完成,但是更加口语化,通常表示温度、时间、岁数等变化。go表示“变得”,常见于某些短语中,后面常有形容词bad、blind、hungry等。be表示“是、成为、当”,多用于将来时、祈使句或不定式中。grow表示“变得”,常指逐渐的变化,表示身高、岁数的增长。turn表示“变得”,指变为与原先不同的情况,通常指颜色等变化。如：I was caught in the rain and I became ill.(我淋雨感冒了)/ He has got rich.(他变富了)/ He will be a scientist in the future.(将来他将成为科学家)/ My little brother has grown much taller in the past year.(在过去的一年里我的弟弟长得高多了)/ The sandwich has gone bad.(那块三明治已经变坏)/ Her face turned red after her mother criticized(批评) her.(妈妈批评了他以后他的脸变红了)(3) 关于助动词：常见的助动词有：用于进行时和被动语态的be (am, is, are ,was, were, been, being ) ;用于完成时的have(has,had,having) ;用于将来时的shall (should) ; will (would)和用于一般时的do(does,did) .助动词必须同主语的人称和数一致,也就是说因主语人称、数的不同而采用不同的形式,其中有些助动词也可作情态动词。如：shall, will, should, would.(4) 关于情态动词：常见的情态动词有：can (could) ,may (might), must ,shall (should), will (would), dare (dared) , need等,另外,have to、had better也当作情态动词使用。情态动词后面必须加动词的原形。can表示体力、脑力方面的能力或客观的可能性。口语中, 在询问或说明一件事可不可以做时,常用“can”代替“may”。情态动词“can”的过去式是“could”,否定式是“cannot”通常缩写成“cant”,“could”的否定式是“could not”,通常缩写成“couldnt”。如：Can I help you?(要帮忙吗？)/ He can swim.(他会游泳)/ That cant be Mr Li.(那不可能是李先生)may表示允许、请求或可能性,用may提问时,肯定回答一般用Certainly或Yes,you may.;否定回答一般用cant或mustnt. 如：May I ask you a question?Certainly.(可以问你一个问题吗？当然可以)/ You may go now.(现在你可以走了)/ It may be in your pocket.(它可能在你的衣袋里)must表示“必须”、“一定”的意思。表示“必须”时否定形式是mustnt；表示“一定”时,否定形式是“cant”如：We must be very careful when we cross the road.(我们过马路时一定要非常小心)/ It must be Jack.(那准是杰克)/ I havent seen Kate today. She cant be here.(我今天没有看到过凯特,她不可能在这里)注意用must(必须)进行提问时,肯定回答用must,否定回答用neednt；用must(一定)进行提问时,肯定回答仍用must,但是否定回答用cant.如：Must we clean the room before we leave? Yes,youmust.或No,youneednt.(我们走之前必须要打扫房间吗？是的,必须打扫。/ 不,不需要。) / Must she be in the romm? Yes,shemust.或No,shecant.(她一定在房间里吗？是的,一定。/ 不,不可能在。)“have to”表示“不得不”、“必须”。Well have to leave now for it is very late at night.have to的疑问形式是：助动词+have to,否定形式是：助动词+not+have to或者用neednt.如：Do you have to stay until 8 oclock?(你得呆到8点钟吗？)/ You dont have to do so.(=You neednt do so.)(你不用这么做)shall在问句中,可表示征求对方意见,与第一人称连用；在陈述句的第二、三人称的主语后或表示“命令”、“警告”、“允许”等。如：Shall we go to the zoo this weekend?(我们这个周末去动物园好吗？)/ He shall bring his own book next time.(他下次必须带自己的书来)should可表示“劝告”、“建议”、“惊奇”等意思。We should speak to old people politely.(我们应该礼貌地对老人讲话)will表示“意愿”、“决心”等意思,一般与第二人称连用。如：Will you please close the door for me?(请你替我把门关上好吗？)/ I will teach you a lesson.(我要教训你一顿)would表示过去的“意愿”、“决心”等。He would sit near the fire every time he returned home.(每次他回到家中总要坐在火炉边)would也可以表示现在的情况,表达说话人向对方提出的要求,语气比“will”婉转、客气。在日常会话中,“我想要”通常用“I would like to”或“I should(Id) like to”来表示。如：Would you like to have a rest at the moment?(你现在想要休息一下吗？) would还可以表示过去经常发生的事情。如：Every year parents would tell their children about the boy who would save his people.(每一年父母们总是向孩子们讲述这个将会拯救他的人民的男孩的事)need表示“需要”,用于疑问句或否定句。“need”作实义动词时,在肯定、否定、疑问句中都可以用。如：He neednt do it in such a hurry.(他不需要如此匆忙地做这件事)/ He needs some help.(他需要一些帮助)/ He doesnt need to bring his football socks then.(那么他就无须带上足球袜了)dare是“敢”的意思,用法几乎与“need”完全相同,即在疑问句和否定句中,可以作情态动词,后面用不带“to”的动词不定式。在肯定句中和实义动词一样,后面的动词不定式要带“to”。How dare you say I am a fool?(你竟敢说我是个傻瓜？)/ He didnt dare to touch the red button.(他不敢触碰那个红色的按钮) d better(do)(“最好是”)一般也当作情态动词使用,否定式是：d better not (do). 如：Youd better sit here and say nothing.(你最好坐在这儿不讲话)/ Youd better not speak because he is sleeping.(你最好不要讲话因为他正在睡觉)2、动词词形变化一览表：(1)规则动词变化表：规则变化原形动词结尾情况现在时单三人称现在分词过去式和过去分词一般情况+s+ing+eds,x,ch,sh,o结尾+es+ing+ed辅音字母+y结尾yi,+es+ingyi,+ed重读闭音节一元一辅结尾+s双写辅音字母,+ing双写辅音字母,+ed不发音的e结尾+s去掉e,+ing+die结尾+siey,+ing+d不规则变化havehas；beis(无) (见不规则动词变化表)注意：在加ing或ed时动词如果以“r”结尾,尾音节又重读的动词,“r”应双写。s/es的读音规则：在清辅音后读s；在浊辅音后和元音后读z；在 s 、 F、z、tF、dV后读iz.ed的读音规则：在清辅音后读t；在浊辅音后和元音后读d；在t、d后读id.(2)不规则动词变化表：( 原形过去式过去分词)be(am,is) wasbeenloselostlostbe(are)werebeenmakemademadebeatbeatbeatenmaymightbecomebecamebecomemeanmeantmeantbeginbeganbegunmeetmetmetblowblewblownmistakemistookmistakenbreakbrokebrokenmustmustbringbroughtbroughtpaypaidpaidbuildbuiltbuiltputputputbuyboughtboughtreadreadReadcancouldrideroderiddencatchcaughtcaughtringrangrungchoosechosechosenriseroserisencomecamecomerunranruncostcostcostsaysaidsaidcutcutcutseesawseendigdugdugsellsoldsolddodiddonesendsentsentdrawdrewdrawnsetsetsetdrinkdrankdrunkshallshoulddrivedrovedrivenshineshoneshoneeatateeatenshowshowedshownfallfellfallenshutshutshutfeelfeltfeltsingsangsungfindfoundfoundsinksank/sunksunk/sunkenflyflewflownsitsetsetforgetforgotforgot/forgottensleepsleptsleptfreezefrozefrozensmellsmeltsmeltgetgotgotspeakspokespokengivegavegivenspendspentspentgowentgonespillspiltspiltgrowgrewgrownspoilspoiltspoilthanghung/hangedhung/hangedstandstoodstoodhave(has)hadhadsweepsweptswepthearheardheardswimswamswumhidehidhiddentaketooktakenhithithitteachtaughttaughtholdheldheldtelltoldtoldhurthurthurtthinkthoughtthoughtkeepkeptkeptthrowthrewthrownknowknewknownunderstandunderstoodunderstoodlaylaidlaidwakewoke/wakedwoken/wakedlearnlearnt/learnedlearnt/learnedwearworewornleaveleftleftwillwouldlendlentlentwinwonwonletletletwritewrotewittenlielaylain3、be(“是/存在”)动词的各种时态变化：一般现在时一般将来时现在完成时I am.You are.He/She/It is.We/You/They are.(I等各人称) will be.I am He/She/It is going to be We/You/They are I have been.You have been.She/he/It has been.We/You/They have been.一般过去时过去将来时过去完成时I was.You were.He/She/It was.We/You/They were.(I等各人称) would be.I was He/She/It was going to be We/You/They were I had been.You had been.She/he/It had been.We/You/They had been.注意：句型变化时,否定句在am /is /are /will /have /has /was /were /had /would 后面加not,而且not都可以缩写为nt (am后面not不可以缩写)；疑问句将am /is /are /will /have /has /was /were /had /would 提前到句首。4、其它谓语动词(主动语态)的时态变化一览表：现在时态一般现在时现在进行时一般将来时现在完成时谓语动词构成动词用原形(单三加s / es)(问句和否定句借用助词do / does)amis +动词-ingarewill + 动词原形amis +going to+动词原形arehave +过去分词has过去时态一般过去时过去进行时过去将来时过去完成时谓语动词构成动词用过去式(问句和否定句借用助词did)was +动词-ingwerewould + 动词原形was+going to+动词原形werehad +过去分词5、八种时态的具体用法：(1) 一般现在时表示现阶段经常或习惯发生的动作或存在的状态,或说明主语的特征。一般现在时句子中常有的时间状语：often,usually,sometimes,always,every (day等), once/twice,a(week等), on (Sunday等),never,in the (morning等)。如：They go to the Palace Museum once a year.(他们每年去一次故宫)/ They often discuss business in the evening.(他们经常在晚上商谈生意)表示客观真理、事实、人的技能或现在的状态时句子里一般不用时间状语。如：The earth turns round the sun.(地球绕着太阳转)/ Light travels faster than sound.(光传播比声音快)表示十分确定会发生(如安排好的事情)或按照时间表进行的事情,用一般现在可以表达将来,句子中可以有将来时间。如：The train for Haikou leaves at 8：00 in the morning.(开往汉口的列车上午8点开车)在时间状语从句中(以when, after, before, while, until, as soon as等引导)和条件状语从句中(以if,unless引导),用一般现在时代替一般将来时,句子可以有将来时间。如：Please ring me up as soon as you arrive in Germany.(你一到德国就给我打电话) / If it rains tomorrow,we will have to stay at home.(如果明天下雨我们就只好呆在家)一般现在时用于倒装句中可以表示正在发生的动作,动词以come, go为主。如：Here comes the bus. (车来了) / There goes the bell.(铃响了)。一般现在时常用于体育比赛的解说或寓言故事中。Now the midfield player catches the ball and he keeps it.人的心理活动和感官动作一般用一般现在时而不用现在进行时表达,常见动词有：like, love, hate, dislike, want, wish, hope, think(认为),understand, remember, forget, mean, need, hear, feel, see. 如：I think it is going to snow.(我想天要下雪了)/ I really hope you can enjoy your stay here.(我真的希望你愉快地呆在这儿)(2) 一般过去时表示过去某时发生的动作或状态,这种动作或状态可能是一次性,也可能经常发生。表示过去具体时刻发生的一次性动作时,时间状语有：at (eight) (yesterday morning),(ten minutes) ago, when引导的时间状语从句。如：I got up at 6：00 this morning.(我是早上六点钟起床的)/ Little Tom broke the window at half past nine this morning.(小汤姆今天早上九点半把窗子打破了)/ When he went into the room,he saw a stranger talking with his father.(他走进房间时发现一个陌生人正和他父亲谈话)表示过去一段时间内不知何时发生的一次性动作时,时间状语有：yesterday, last (year等), in (1998 等)。如：He came to our city in the year 2000.(他2000年来到我们市)表示过去一个阶段中经常发生的事情时,时间状语有：last, in, fromto, for(10 years),often,usually, sometimes, always, never等。如：Mr Jackson usually went to evening schools when he was young. / Every day he went to the rich man and borrowed books from him.讲故事、对过去经历的回忆、双方都明白的过去事件等一般用过去时,而且经常省略时间状语。如：I happened to meet Rose in the street.(我正好在街上遇到露西)(3) 一般将来时表示将来某一时刻或经常发生的动作或状态。一般将来时的时间状语有：tomorrow,this (afternoon),next (year),one day,now,soon, someday,sometime, in the future, when引导的从句等。用will构成的将来时,表示动作与人的主观愿望无关。“shall”用于第一人称,“will”用于所有人称。如：I will graduate from this school soon.(我很快就要从这所中学毕业了)/ You will stay alone after I leave.(我走了之后你就要一个人过了)“am/is/are going to+动词原形”表示打算或准备要做的事情,或者主观判断即将要发生的事情,而“am/is/are to +动词原形”表示安排或计划中的动作。如：A man told them that the woman was to give birth to the special baby.(有一个人告诉他们那个妇女就会生下那个特别的男孩)/ Its going to rain soon.(天快要下雨了)表示一个人临时决定要做某事,可以用will表达。如：I will go to the lab to get some chemicals(化学药剂). So please wait until I return.(我要到化学实验室去取些药品,请等我回头)现在进行时、一般现在时也可以表示将来。(见相应时态)shall和will在口语的一些疑问句中相当于情态动词。Shall一般与第一人称连用,will与第二人称连用。如：Shall we go to the zoo next Saturday?(我们下周六去动物园好吗？)/ Will you please open the door for me?(替我把门打开好吗？)“be to +动词原形”表示按照计划将要发生的事情。如：An angel came to tell her that she was to have this special boy.(4)现在进行时现在进行时表示现在正在进行的动作或是现阶段正发生而此刻不一定在进行的动作。现在进行时由“助动词be (am is are ) +现在分词”构成。现在进行时的时间状语有：now, this , these等,但经常不用。如：What are you doing up in the tree?(你在树上干什么？)/ I am writing a long novel these days.(我最近在写一本长篇小说)表示即将发生的动作,一般指近期安排好的事情。常见的动词有：come, go, stay, leave, spend, do等。如：Im coming now.(我就来)/ What are you doing tomorrow?(你明天干什么？)/ He is leaving soon.(他就要走了)表示频繁发生或反复进行的动作,常与always等频度副词连用,以表示赞扬、不满或讨厌等感情色彩。如：He is always borrowing money from me and forgetting all about it some time later.(他老是向我借钱,过一些时候就忘得一干二净)(5)过去进行时过去进行时表示过去某一时刻或某阶段正在进行的动作。过去进行时由“was(第一、三人称单数)或were(第二人称单数和各人称的复数)+现在分词”构成。过去进行时的时间状语有：then, at that time, this time yesterday, at (eight) yesterday (morning),(a year) ago, 以及由when引出的时间状语从句。如：He was cooking supper this time yesterday.(昨天这个时候他正在做晚饭)/ The little girl was playing with her toy when I saw her.(我看到小女孩的时候她正在玩玩具)用于宾语从句或时间状语从句中,表示与主句动作同时进行而且是延续时间较长。句子中通常不用时间状语。如：She was it happen when she was walking past.(她路过时看到事情的发生)/ They sang a lot of songs while they were walking in the dark forest.(他们在黑暗的森林里走时唱了很多歌)也可以表示过去一个阶段频繁发生或反复进行的动作,常与always等频度副词连用,以表示赞扬、不满或讨厌等感情色彩。如：He was always borrowing money from me when he lived here.(他住在这里时老向我借钱)(6)现在完成时现在完成时表示一个发生在过去的、对现在仍有影响的动作,或表示开始在过去,并且一直延续到现在,甚至还可能延续下去的动作。在完成时由“助动词have (has)+动词的过去分词”构成。表示发生在过去的对现在仍有影响的动作时,时间状语有：already, yet, just, once, twice,ever, never,three times, before等。如：I have never seen such fine pictures before. (我以前从来没有看过这么好的画)/ He has just gone to England.(他刚去英国)表示在过去开始一直延续到现在(可能延续下去)的动作或状态时,时间状语有：for (two years),since 1990, since (two weeks ago)和since引导的状语从句。如：I have been away from my hometown for thirty years.(我离开家乡有30年了)/ Uncle Wang has worked in the factory since it opened.(自从这家工厂开张,王叔叔一直在那儿工作)口语中have got往往表示have(有)的意思。如：They have got thousands of books in their library.(他们图书馆有上万本书)have been to与have gone to的区别：have gone to(“已经去了”)表示人不在这里,have been to(“去过”)表示人在这里。如：-Where is Mr Li? He has gone to the UK.(李先生在哪里？他去了英国。)/ -Do you know something about Beijing? Yes,Ihave been to Beijing three times. (你知道北京的情况吗？是的,我去过那里三次。)在完成时中,一个瞬间性动词(一次性动作)不能与表示一段时间的状语连用,此时须将该瞬间动词改为延续性动词或状态动词。具体变化见下表：瞬间性动词的完成时延续性动词或状态动词的完成时have(already)gone tohavebeen in / at for (two years)hascome tohasbeen heresince (1990)(had)left(had)been away fromarrivedbeen indiedbeen deadbegunbeen onendedbeen overbought.hadborrowedkeptjoinedbeen in 或者使用下面这个句型：It is / has been + (多久)+ since +主语(人)+谓语(过去时)+过去时间状语 注意 在其它的时态中也存在类似问题,记住,关键是：瞬间动词不能和表达一段时间的状语连用。如：How long may I keep the book?(这本书我能借多久？)(句子中keep取代了borrow)(7) 过去完成时过去完成时表示过去某一时间或某一动作发生之前已经完成的动作。简言之, 过去完成时所表示的时间是“过去的过去”。过去完成时由“助动词had+动词的过去分词”构成。过去完成时时间状语有：by (yesterday), by then, by the end of (last)或者由when,before等引出状语从句。有时句子中会有already, just, once, ever, never等词语,也会有for或since构成的时间状语。如：They had already finished cleaning the classroom when their teacher came.(当老师来的时候他们已经打扫完了教室)/ The woman had left before he realized she was a cheat.(在他发觉那个妇女是个骗子时她已经走掉了)过去完成时常用于宾语从句中、after引导的从句中,或者从句是before引导的主句中。如：After I had put on my shoes and hat,I walked into the darkness.(我穿上鞋子戴上帽子走进了黑暗之中)/ He said that he had never seen a kangaroo before.(他说他以前从来没有见过袋鼠)(8) 过去将来时过去将来时表示在过去预计将要发生的动作或存在的状态。过去将来时由“助动词should(第一人称)或would(第二、三人称)+动词原形”构成。在美国英语中,过去将来时的助动词一律用“would +动词原形”。过去将来时常由于宾语从句中,时间状语有：later, soon, the next (day).在时间状语从句和条件状语从句中不可以使用过去将来时,而应该使用一般过去时。如：He promised that he would pay me a lot if I helped him with the project.(他答应付给我许多钱如果我帮助他搞那个项目)/ Every time when he was free,hewould sit down and read some books.(每次只要他有空他就会坐下来看看书)表示纯粹的将来时用would或should,表示打算或主观认为的事情用was/were going to (+动词原形)。如：She told me she would be 18 the next month.(她告诉我她下个月就18岁了)/ She told me that she was going to have a walk with her pet dog.(她告诉我她打算带她的宠物狗去散步)过去将来时还可以表示一个过去经常性的动作。如：When it rained in the day, he would bring an umbrella with him.(白天下雨时他会随身带一把雨伞)
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