一般现在时和现在进行时的区别

论坛 一般现在时和现在进行时是两种重要时态,通过对这两种时态进行对比我们可以更加牢固地掌握它们的用法。我们可以从以下三个方面进行对比： 一、基本用法 一般现在时一般用来表示人或物经常性或习惯性的动作或状态,也可以用来表示人或物现在的状态或者用来表示主语现在具有的性格或能力等。现在进行时则一般用来表示现在(说话的瞬间 ) 正在发生或进行的动作或者用来表示现阶段正在进行或发生的动作。如: She goes to school by bike every day. 她每天骑自行车去上学。(经常性的动作) He can speak a little Chinese. 他会说点儿汉语。(主语现在具有的能力) They are watching TV now. 现在他们正在看电视。(正在进行的动作) We are working on the farm these days. 这几天我们一直在农场劳动。(现阶段发生的动作) 二、谓语动词的形式不同 一般现在时的谓语动词为:1.be动词用am / is / are这三种形式; 2.实义动词用动词原形或第三人称单数形式。 现在进行时谓语动词的形式为:be(am, is, are) + 实义动词的 -ing 形式。 这两种时态的否定句和一般疑问句的变法也不同:在一般现在时中,含be动词的句子变否定句直接在be(am,is,are)后加not,变一般疑问句是直接将be(am,is,are)提到句首;含实义动词的句子变否定句和一般疑问句必须借助于助动词do 或does。而现在进行时的句子变否定句则直接在be(am, is, are)后面加 not;变一般疑问句是把 be(am, is, are)提到句首。如: She doesn't go to school by bike. She goes to school by bus.她不是骑自行车去上学,而是乘公共汽车去上学。 She isn't doing her homework now. She is watching TV.现在她没做家庭作业,她在看电视。 -Do they often play football? 他们经常踢足球吗? -Yes, they do. ( No, they don't.) 是的,他们经常踢。(不,他们不经常踢。) -Are they playing football now?现在他们正在踢足球吗? -Yes, they are. (No, they aren't.) 是的,他们正在踢。(不,他们没踢。) 三、时间状语 一般现在时常与often, sometimes, always, usually等频度副词和every morning / day / week, on Wednesday, on Sundays, in the morning / afternoon / evening等时间状语连用。 现在进行时常与now, these days, at this moment等时间状语连用。句首有 Look! / Listen!等提示语时,后面的句子也要用现在进行时。如:

We often go shopping on Sundays.我们经常在星期天去买东西。 Listen! Someone is singing an English song in the classroom. 听!有人在教室里唱英文歌

[一般现在时与现在进行时的区别]一般现在时表示经常、反复或习惯性的动词，常和时间状语 always , often , usually , sometimes , every and , in the morning , on Sundays 等连用。 现在进行时表示此时此刻或说话瞬间正在发生的动作或存在的状态，常和时间状语 now 连用。如： Do you often go and see your teacher ? 你经常去看你的老师吗 ? I always clean my bedroom on Sundays . 我总在每周日打扫卧室。 She is cleaning her bedroom now . 她现在正在打扫卧室。 Listen ! Who is singing in the room ? 听 ! 谁在房间唱歌 ? I. 概念不同 1.一般现在时表示经常性或习惯性的动作或存在的状态，也表示说话者的能力，还可以表示自然现象。例如： My father goes to work by bicycle every day. 我爸爸每天骑自行车上班。 I can drive a car. 我会开小汽车。 2. 现在进行时表示说话时（瞬间）正在进行的动作，也表示目前阶段一直进行的动作。例如： I am doing my homework now. 我正在做作业。 II. 构成不同 1. 一般现在时的谓语构成主要有四种形式： 连系动词be（am, is, are）+名词、形容词等；实义动词原形；实义动词的第三人称单数形式；情态动词＋实义动词原形。例如： I am a teacher. 我是名教师。 I go to school at six in the morning. 我早晨六点去上学。 Tigers eat meat. 老虎吃肉。 I can sing in English. 我会用英语唱歌。 另外，祈使句实际上也是一般现在时。例如： Let's go to the zoo. 咱们去动物园吧。 2. 现在进行时由助动词be（am, is, are）＋现在分词构成。例如： The lion is sleeping. 那只狮子正在睡觉。 III. 时间状语不同 一般现在时的时间状语主要有： every day/ morning， in the morning/afternoon/evening， at eight o'clock等短语和often, usually, sometimes, always等频率副词。例如： We watch TV in the evening. 我们晚上看电视。 现在进行时的时间状语 主要有： now， these days等。例如： What are you doing these days? 你这些天在干什么？

宾语从句详解 宾语从句用法详解核心提示：宾语从句是主从复合句中最常见的从句之一。 它作及物动词、介词或者某些形容词的宾语。由于宾语从句涉及到引导词、语序、时态等多方面的内容，所以宾语从句的用法一直是学习的重点难点。本文对宾语从句的用法进行了详尽讲解并附有例句，望对中学生朋友有所帮助。一.宾语从句的定义置于动词、介词等词性后面起宾语作用的从句叫宾语从句。宾语从句的语序必须是陈述语序。谓语动词、介词、动词不定式，v.-ing形式后面都能带宾语从句。有些形容词（afraid,sure,glad等）之后也可以带宾语从句。二.宾语从句中引导词的用法在复合句中作主句的宾语，引导词有：连词：that (that 常可省略),whether, if代词：who, whose, what ,which副词：when ,where, how, why 等。（一）that引导的宾语从句（在非正式场合that可以省略）可跟that从句做宾语的动词有：say, think, insist, wish, hope, demand, imagine, wonder, know, suppose, see, believe, agree, admit, deny, expect, explain, order, command, feel, dream, suggest, hear, mean, notice, prefer, request, require, propose, declare, report等。例句：The boy believes that he will travel through space to other planets.注意事项：当主句谓语动词是 think, believe, suppose, expect 等词，而宾语从句的意思是否定时，常把否定转移至主句表示。例句：I don’t think it is right for him to treat you like that.在以下情况中that不能省略1.当句中的动词后接多于两个由that引导的宾语从句时，第一个that可省，但后面的that不可省。例句：He said (that) you were too young to understand the matter and that he was asked not to tell you.2.当主句的谓语动词与that宾语从句之间有插入语时，that一般不可省。例句：Just then I noticed, for the first time, that our master was wearing his fine green coat and his black silk cap.3.当that从句是双宾语中的直接宾语时，that不可省。例句：I can’t tell him that his mother died.注意事项：许多带复合宾语的句子，that引导的宾语从句经常移到句子后部，而用it作形式宾语。例句：I find it necessary that we should do the homework on time.（二）由whether,if 引导的宾语从句由whether(if)引导的宾语从句，实际上是一般疑问句演变

而来的。意思是“是否”。宾语从句要用陈述句语序。一般说来，在宾语从句中whether与if可以互换使用，但在特殊情况下if与whether是不能互换的。例句：I wonder whether(if) they will come to our party.只能用whether，不能用if引导的宾语从句1.在带to的不定式前例句：We decided whether to walk there. 2.在介词的后面例句：I’m thinking of whether we should go to see the film.3.在动词后面的宾语从句时例句：We discussed whether we had a sports meeting next week4.直接与or not连用时例句：I can’t say whether or not thet can come on time.只能用if不能用whether引导的宾语从句1.if引导条件状语从句，意为“如果”例句：The students will go on a picnic if it is sunny.2.if引导否定概念的宾语从句时例句：He asked if I didn’t come to school yesterday.3.引导状语从句even if（即使）和as if（好象）时例句：He talks as if he has known all about it.（三）连接代词和连接副词引导的宾语从句这样的宾语从句实际上是由特殊疑问句变化而来的，宾语从句要用陈述句语序。用于这种结构的动词常常是：see, say, tell, ask, answer, know, decide, show, find out, imagine, suggest, doubt, wonder, discover, understand, inform, advise等。英语中的连接代词有：who,whom,whose,which,what,在句中担任主语、宾语、定语或者表语。例句：Can you tell me whom you are waiting for?英语中的连接副词有：when,where,why,how，在句中担任状语的成分。例句：None of us knows where these new parts can be bought.三.宾语从句的语序宾语从句的语序是陈述句语序即：连接代词/副词+主语+谓语+其他成分。例句如下：1.I don’t know what they are looking for.2.Could you tell me when the train will leave?3.Can you imagine what kind of man he is?四.宾语从句的时态1.主句是一般现在时，从句根据实际情况使用任何时态。例句：The headmaster hopes everything goes well.2.主句是过去时态，从句须用过去时态的某种形式。例句：She was sorry that she hadn’t finished her work on time.3.当宾语从句表示的是一个客观真理或者事实时，即使主句是过去时，从句也用一般现在时态。例句：The teacher told his class that light travels faster than sound.五.宾语从句的特点1.宾语从句可以作及物动词、介词及形容词的宾语。2.宾语从句的语序一律用陈述句语序。3.连接词that引导宾语从句在

句中无词义，不充当句子成份，多数情况下可以省略。4.whether 和 if 都可引导宾语从句，但 whether后可紧跟or not；whether从句可作介词的宾语。5.如果从句太长，可以用形式宾语it.

在复合句中用作宾语的从句叫宾语从句。 1．语序 无论主句是陈述句还是疑问句，宾语从句都必须使用陈述语序，即“主句＋连词＋宾语从句（主语＋谓语＋……）”句式。根据连接词在从句中所担任的不同成分，可分为以下四种： 1）连接词＋谓语。连接词在从句中作主语。常见的连接词有： who，what，which等。如： Could you tell me who knows the answer，please？你能告诉我谁知道答案吗？ The small children don't know what is in their stockings．这些小孩子不知道袜子里有什么东西？ 2）连接词＋名词＋谓语。连接词在从句中作主语的定语。常见的连接词有：whose，what，which，how many，how much等。如： He asked whose handwriting was the best in our class．他问我们班上谁的书法最好。 The teacher asked us how many people there were in the room．老师问我们房间里有多少人。 3）连接词＋主语＋谓语。连接词在从句中作宾语、状语或表语。常见的连接词有：who（m），what，which，how many，how much， when，why，how，where，if ／whether（在句中不充当任何成分）等。如： He hasn't decided if he'll go on a trip to Wuxi．他还没决定是否去无锡旅行。 Could you tell me what I should do with the money ？你能告诉我我如何处理这笔钱吗？ 4）连接词＋名词＋主语＋谓语。连接词在从句中作宾语或表语的定语。常见的连接词有：what，which，how many，how much，how等。如： Do you know which class he is in ？你知道他在哪个班吗？ She asked me if I knew whose pen it was．她问我是否知道这是谁的钢笔。 2．连接词 1）当由陈述句充当宾语从句时，用that引导，that无词义，在口语或非正式文体中常省略。如： He said that he could finish his work before supper．他说他会在晚饭前完成工作。 2）当由一般疑问句充当宾语从句时，用if或whether引导，意为“是否”。如： I don't know if ／whether he still lives here after so many years．我不知道这么多年后他是否还住在这儿。 但

在下列情况下只能用whether： ①在具有选择意义，又有or或or not时，尤其是直接与or not连用时，往往用whether（if…or not也可以使用）。如： Let me know whether ／if he will come or not．（＝Let me know whether or not he will come）让我知道他是否能来。 I don't know whether ／if he does any washing or not．（＝I don't know whether or not he does any washing．）我不知道他洗不洗衣服。 I wonder whether we stay or whether wego．我不知道我们是去还是留。 ②在介词之后用whether。如： I'm interested in whether he likes English．我关心的是他是否喜欢英语。 We're thinking about whether we can finish the work on time．我们正在考虑是否能按时完成这项工作。 I worry about whether I hurt her feelings．我担心是否伤了她的感情。 ③在不定式前用whether。如： He hasn't decided whether to visit the old man．他尚未决定是否拜访那位老人。 I don't know whether to go．我不知去否。 He hasn't decided whether to go by bus or by train．他还未决定是乘公共汽车去还是坐火车去。 ④whether置于句首时，不能换用if。如： Whether this is true or not，I can't say．这是否真的我说不上来。 ⑤引导主语从句和表语从句时宜用whether。如： Whether she will come or not is still a question．她是否能来还是个问题。 The question is whether we can catch the bus．问题是我们能否赶上公共汽车。 ⑥若用if会引起歧义时，则用whether。如： Please let me know if you like the book．可理解为： a．Please let me know whether you like the book．请告诉我你是否喜欢这本书。 b．If you like the book，please let me know．你如果喜欢这本书，请告诉我。 3）如果宾语从句原来是特殊疑问句，只需用原来的特殊疑问词引导。如： Could you tell me why you were late for the meeting this morning？你能告诉我今天早上你为什么开会迟到吗？ 3．时态 含宾语从句的复合句，主、从句谓语动词的时态呼应应包括以下三点内容： 1）如果主句的谓语动词是一般现在时，从句的谓语动词可根据需要，选用相应的任何时态。如： I don't know when he will come back．我不知道他将何时回来。 He tells me that his sister came back yesterday．他告诉我他姐姐昨天回来了。 2）如果主句的谓语动词

是过去时，宾语从句的谓语动词只可根据需要，选用过去时态即一般过去时、过去进行时、过去将来时或过去完成时的某一种形式。如： ①The children didn't know who he was．孩子们不知道他是谁。 ②He asked his father how it happened．他问他父亲这件事是如何发生的。 3）如果宾语从句所表示的是客观事实、普遍真理、自然现象或习惯性动作等，不管主句用什么时态，从句时态都用一般现在时。如： The teacher said that the earth goes round the sun．老师说地球绕着太阳转。 4．注意： if和when既可以引导宾语从句，也可以引导状语从句，应注意它们在两种从句中的意思和用法的不同。if和when引导宾语从句时，分别意为“是否”和“何时”，其时态应和主句时态相呼应；它们引导状语从句时，意思分别为“如果，假如”和“当……时候”，当主句时态是一般将来时时，其时态用一般现在时。它们常常放在含有状语从句和宾语从句的题干中进行综合考查。如： —Do you know when he will come back tomorrow ？你知道他明天什么时候回来吗？ —Sorry，I don't know．When he comes back，I'll tell you．对不起，不知道。当他回来了，我将告诉你。 —I don't know if he will come．我不知道他是否会来。 —He will come if it doesn't rain．如果不下雨，他会来的。

简化宾语从句常用六法 同学们常会遇到把含有宾语从句的复合句转化为简单句，使其与原句意思相同（或相近）的试题。下面就介绍几种常用的简化宾语从句的方法： 方法一：当主句谓语动词是hope， decide， wish， choose， agree， promise等，且宾语从句的主语与主句主语一致时，宾语从句可简化为不定式结构。例如： Li Ming hopes he will be back very soon. →Li Ming hopes to be back very soon. We decided that we would help him. →We decided to help him. 方法二：当主句谓语动词是know， learn， remember， forget， tell等动词，且主句主语与从句主语一致时，宾语从句可简化为“疑问词+不定式”结构。例如： She has forgotten how she can open the window. →She has forgotten how to open the window. 注：当主句谓语动词是tell， ask， show， teach等动词，且后带双

宾语，从句主语和间接宾语一致时，宾语从句可简化为“疑问词+不定式”结构。例如： Could you tell me how I can get to the station？ →Could you tell me how to get to the station？ 方法三：当主句的谓语动词是order（命令），require（需要）等时，如果主句和从句的主语不一致，宾语从句可简化为“名词（代词）+不定式”结构。例如： The headmaster ordered that we should start at once. → The headmaster ordered us to start at once. 方法四：某些动词后的宾语从句，可以用介词加动名词（短语）等其他形式简化。例如： He insisted that he should go with us. →He insisted on going with us. The poor boy doesn’t know when and where he was born. →The poor boy doesn’t know the time and the place of his birth. 方法五：某些动词后面的宾语从句可转化为“宾语+V-ing形式（作宾语补足语）”结构。例如： Liu Ping found that there was a wallet lying on the ground. → Liu Ping found a wallet lying on the ground. 方法六：动词seem后的宾语从句，也可以用不定式（短语）来简化，但句型需要进行适当的变化。例如： It seemed that the boys were going to win. →The boys seemed to win. 除上述方法外，还有一些特殊句式的转化。例如： I found that it was difficult to learn English well. →I found it difficult to learn English well. Soon we found that the ground was covered with thick snow. →Soon we found the ground covered with thick snow. They found that the box was very heavy. →They found the box very heavy

现在完成进行时与现在完成时的用法、区别(2011-08-01 15:09:48)转载▼标签： 转载 致谢！原文地址：现在完成进行时与现在完成时的用法、区别作者：justdoit现在完成进行时的用法 1. 现在完成进行时的定义现在完成进行时表示某动作从过去某个时间开始，一直延续到现在，并且还有可能持续下去。如：We have been waiting for him for two hours. 我们等他等了两个小时。 2. 现在完成进行时的结构现在完成进行时由“have /has been + 现在分词”构成。 3. 现在完成进行时的应用现在完成进行时所用的时间状

语：this month / week / year, these days, recently / lately, in the past few + 时间段, since +时间点, for + 时间段。如：They have been building the bridge for two month. 两个月来他们一直在修桥。They have been planting trees this month. 这个月来他们一直在植树。 4. 现在完成进行时与现在完成时的区别 (1) 现在完成时强调动作的完成，而现在完成进行时强调动作的延续，因此，表示动作的完成，只能用现在完成时，而不能用现在完成进行时。如：He has changed his idea. 他改变了想法。(from www.hxen.com) (2) 在表示动作的延续时，虽然既可用现在完成时，也可用现在完成进行时，但现在完成进行时强调动作的进行。因此在需要明确表示动作还要持续下去时，应用现在完成进行时。如： We have been studying here for two years. 我们在这儿已经学习了两年了。 (3) 有些延续性动词(如 keep, learn, live, stay, study, work等)，用于现在完成时或现在完成进行时的区别不大。如： I have lived here for many years.=I have been living here for many years. 我在这儿住了多年了。

现在完成时：（一般有以下两种意义）⒈过去发生或已经完成的动作对现在造成影响或后果⒉过去某一时间开始并一直持续到现在的动作或状态句型：基本结构：主语+have/has+过去分词(done)①肯定句：主语+have/has+过去分词+其他②否定句：主语+have/has+not+过去分词+其他③一般疑问句：Have/Has+主语+过去分词+其他④特殊疑问句：特殊疑问词+一般疑问句（have/has+主用法用法：（1）现在完成时用来表示现在之前已发生过或完成的动作或状态,但其结果却和现在有联系,也就是说,动作或状态发生在过去但它的影响现在还存在. I have spent all of my money.(含义是:现在我没有钱花了.) Jane has laid the table.(含义是:现在桌子已经摆好了.) Michael has been ill.(含义是:现在仍然很虚弱) He has returned from abroad. (含义是:现在已在此地)（2）现在完成时可以用来表示发生在过去某一时刻的,持续到现在的情况,常与for（+时间段）,since（+时间点）连用. Mary has been ill for three days. I have lived here since 1998. 注（超重要）：瞬间动词（buy,die,join,lose……）不能直接与for since 连用。要改变动词 come-be go out-be out finish-be over open-be open die-be

dead ……………… 1.have代替buy My brother has had(不能用has bought) this bike for almost four years. 2、用keep或have代替borrow I have kept(不能用have borrowed) the book for quite a few days. 3、用be替代become How long has your sister been a teacher? 4、用have a cold代替catch a cold Tom has had a cold since the day before yesterday. 5、用wear代替put on b)用“be＋形容词”代终止性动词 1、be＋married代marry 2、be＋ill代fall (get) ill 3、be＋dead代die 4、be＋asleep代fall (get) asleep 5、be＋awake代wake/wake up 6、be＋gone代lose,die,sell,leave 7、be＋open代open 8、be closed代close/shut 9、be＋missing(gone,lost)代lose c)用“be＋副词”代终止性动词 1“be＋on”代start,begin 2“be＋up”代get up 3“be＋back(to)”代return to,come back to,go back to 4“be here (there)”代come(arrive,reach,get) here或go (arrive,reach,get) there等等 d)用“be＋介词短语”代终止性动词 1.“be in/at +地点”代替go to /come to 2.用be in the army 代替join the army 3.“be in/at +地点”代替move to 常用瞬间动词变延续性动词表： 1. have arrived at/in sw. got to/reached sw. come/gone/moved to sw. →have been in sw./at…相应的介词 2. have come/gone back/returned → have been back 3. have come/gone out →have been out 4. have become → have been 5. have closed / opened→ have been close/open 6. have got up → have been up； 7. have died → have been dead； 8. have left sw. → have been away from sw. 9. have fallen asleep/got to sleep → have been asleep； 10. have finished/ended/completed → have been over； 11. havemarried → have been married； 12. have started/begun to do sth. → have done sth. ； 13. have begun → have been on 14. have borrowed/bought →have kept/had 15. have lost → haven’t had 16. have put on →have worn 17. have caught /get a cold → have had a cold； 18. have got to know → have known 19. have/has gone to → have been in 20. have joined/have taken part in the league/the Party/the army →have been a member of/ have been in/have

been the Party’s member/the league member/the soldier… 注意： 1.现在完成时不能单独与准确时间连用，(如表示过去的时间状语） 如yesterday(morning、afternoon),last(morning、afternoon)等，除非与for,since连用. 2.现在完成时往往同表示不确定的过去时间状语连用 如already（肯定）, yet（否定，疑问）, just, before, recently,still, lately等: He has already obtained a scholarship. I haven't seen much of him recently (lately). We have seen that film before. Have they found the missing child yet ? 3. 现在完成时常常与表示频度的时间状语连用, 如often, sometimes, ever, never, twice, on several occasion等: Have you ever been to Beijing I have never heard Bunny say anything against her. I have used this pen only three times. It is still good. George has met that gentleman on several occasions. 4. 现在完成时还往往可以同包括现在时间在内的时间状语连用, 如now, up to these few days/weeks/months/years, this morning/week/month/year, just, today, up to present, so far等: Peter has written six papers so far. Man has now learned to release energy from the nucleus of the atom. There has been too much rain in San Francisco this year. The friendly relations and cooperation between our two countries have been enhanced in the past few years. Up to the present everything has been successful. 5. 现在完成时还可以用来表示过去的一个时间到现在这段时间内重复发生的动作. We have had four texts this semester. 6.现在完成时的\"完成用法\" 现在完成时的\"完成用法\"指的是动作发生在过去某一时刻并已结束，但该动作对现在产生了影响，与现在情况具有因果关系。 例如：He has turned off the light.他已把灯关了。(动作结束于过去，但说明的是现在的情况--灯现在不亮了。) 现在完成时\"完成用法\"的特点是动作不延续，因此，该时态只能与表示不定的过去时间状语(如：already，yet，before，recently等)、频度时间状语(如：never，ever，once等)、包括现在时刻在内的时间状语(如：this morning ／ month ／year...，today等)连用。 例如： Have you found your pen yet？你已找到你的钢笔了吗？ 7.现在完成时的\"未完成用法\" 现在完成时的\"未完成用法\"指的是动作开始于过去某一时刻，一直延续到现

在，或可能还要继续下去。 例如：He has lived here since 1978.自从1978年以来，他一直住在这儿。(动作起始于1978年，一直住到现在，可能还要继续住下去。) I have been in the army for more than 5 years.我在已经呆了五年多了。(动作开始于5年前，一直延续至今，有可能还要继续下去。) 此种用法的句中常需一个表示一段时间的状语(由since或for引导)，或表示与现在时刻相连的时间状语(如：up to now，so far)等。 例如：I have heard nothing from him up to now.到目前为止我没有他的任何消息。 注意：(1)现在完成时的未完成用法只适用于延续性动词，不可用于终止性动词，即瞬间完成或延续时间很短的动词。如：come，go，arrive，leave，join，become，die等。 8.一段时间+has passed+since从句 9. 现在完成时常和短语 \"up to now /till now\far\" (意思是从过去某一确定的时间一直延续到现在.) Up to/till now he's read many story books. 至今他已读过好多故事书。 I've been to New York three times so far. 至今我已到纽约去过三次。 10 has gone (to),has been (to), has been (in) 的区别 gone:去了没回 been to :去过 been in：呆了很久