一般过去时句法结构: 肯定形式 主语+动词过去式+其他 例句:She often came to help us in those days. 否定形式 ①was/were+not;②在行为动词前加didn't,同时还原行为动词 例句:I didn't know you like coffee 一般疑问句 ①Did+主语+do+其他? ②Was\Were+主语+表语? 例句:Did I do that? 用表格整理如下:
结构句型: 1.一般句子 I watched TV last night. 2.一般疑问句 Did you watch TV last night? 3.there be 句型 There was an apple on the table last night. Was there an apple on the table last night
一般过去时注意事项: 1.注意主句与从句中时态的一致性 如果主句用了过去时,从句中一般也要用过去式,或者过去进行时、过去完成时等。例如: He believed that he was right. 他相信自己是对的。 I didn’t know you were here. 我不知道你在这儿。 I thought they were with you. 我以为他们和你在一起。
2.在口语中, 一般过去时并不一定指真正的过去,而只是表示一种礼貌性语气。例如: I wondered (wonder) if you could do me a favor. 不知你可否帮我一个忙。 I wanted (want) to ask if I could borrow your car. 我想问问可否借用你的车。 I hoped (hope) you could (can) give me some advice. 我希望你能帮我出点主意。 Did (Do) you want to see me? 你想见我吗?
3.used to used to 是一个词组,表示“过去曾经是……而现在已经停止了”的动作。例如: I used to work fourteen hours a day. 我过去常常一天干十四个小时。(而现在不这样了) I used to take a walk in the morning.我过去是在早晨散步。(而现在不在早晨散步了)
一般过去式用法: (1)一般过去时表示在过去某个特定时间发生,也可以表示过去习惯性、经常性的动作。 一般过去时不强调动作对现在的影响,只说明过去的事情。 句式:主语+动词过去式+宾语+其它 I had a word with Julia this morning.今天早晨,我跟茱莉雅说了几句话。 He smoked many cigarettes a day until he gave up. 他没有戒烟的那阵子,抽烟抽得可凶了。
(2) 一般过去时常与表示过去的时间状语或从句连用,如: yesterday,last week ,in the past ,in 1993,at that time,once,during the war,before,a few days ago,when 等等. (句子中谓语动词是用一般过去时还是用现在完成时,取决于动作是否对现在有影响)。 Have you had your lunch? 你吃过午饭了吗?(你现在不饿吗?) Yes,I have. 是的,我已经吃过了。(已经吃饱了,不想再吃了。) When did you have it? 你是什么时候吃的?(关心的是吃的动作发生在何时。) I had it about ten minutes ago. 我大约是十分钟以前吃的。) Used to do something 表示过去常做而现在已经停止了的习惯动作。 I used to work fourteen hours a day. 我过去常常一天干十四个小时。 I ate it at 6:45。我在六点四十五分吃了。
(3)带有确定的过去时间状语时,要用过去时。如: yesterday(昨天)、two days ago…(两天前…… )、last year…(去年…)、the other day(前几天)、 once upon a time(很久以前)、 just now(刚才)、in the old days(过去的日子里)、before liberation(解放前…)、 When I was 8 years old(当我八岁时…)、at+一个时间点 Did you have a party the other day?前几天,你们开了晚会了吗? Lei Feng was a good soldier.雷锋是个好战士。 注:在谈到已死去的人的情况时,多用过去时。
(4)表示过去连续发生的动作时,要用过去时。这种情况下,往往没有表示过去的时间状语,而通过上下文来表示。 The boy opened his eyes for a moment,looked at the captain,and then died. 那男孩把眼睛张开了一会儿,看看船长,然后就去世了。
(5)表示过去一段时间内经常或反复的动作。常与always,never等连用。 Mrs. Peter always carried an umbrella.彼得太太过去老是带着一把伞。 (只是说明她过去的动作,不表明她现在是否常带着伞。) 比较: Mrs. Peter always carries an umbrella.彼得太太老是带着伞。 (说明这是她的习惯,表明她现在仍然还习惯总带着一把伞) Mrs. Peter is always carrying an umbrella.彼得太太 总是带着一把伞。 (表示说话者对这一动作或行为厌烦) I never drank wine.我以前从不喝酒。 (不涉及到现在,不说明现在是否喝酒)
(6)如果强调已经终止的习惯时要用 used to do(过去常常做,而现在不那样做了) He used to drink alcohol.他过去喝酒。 (意味着他现在不喝酒了。喝酒这个动作终止了) I used to take a walk in the morning.我过去是在早晨散步。 (意味着现在不在早晨散步了) 比较: I took a walk in the morning.我曾经在早晨散过步。 (只是说明过去这一动作)
(7)有些句子,虽然没有表示过去确定时间的状语,但实际上是指过去发生的动作或存在的状态的话,也要用过去时。 I didn''t know you were in Paris.我不知道你在巴黎。 (因为在说话时,我已经知道你在巴黎了。这句话指的是说话之前,所以只能用过去时表示。实际上,这句话暗指:But now I know you are here.) I thought you were ill.我以为你病了呢。 (这句话应是在说话之前,我以为你病了。但是现在我知道你没病)
一般过去时三变技巧: 一变:肯定句变为否定句 技巧1.当句中含有情态动词或助动词could,would,should等时,可直接在其后面加not构成否定句。例如: I could get you a concert ticket. → I could not / couldn't get you a concert ticket. 技巧2.当句中含有系动词was,were 时,可直接在其后加not构成否定句。例如: I was on the Internet when you called me. → I was not / wasn't on the Internet when you called me. 技巧3.当句中谓语是除情态动词、助动词、系动词was, were以外的动词时,在该动词之前加did not / didn't,动词还原,构成否定句。例如: The famous singer sang some Chinese songs. → The famous singer did not / didn't sing any Chinese songs.
二变:陈述句变为一般疑问句 技巧1.移动词语的位置。将was,were, could,would,should等移到句首。例如: He could pack his things himself. → Could he pack his things himself? 技巧2.添加助动词did。谓语是除情态动词、助动词、系动词was, were以外的动词时,在主语之前加did,动词还原。例如: Mr Li looked very old. → Did Mr Li look very old?
三变:陈述句变为特殊疑问句 技巧1.确定疑问词:人who / whom,物what,地点where,时间when / what time,原因why,频率how often,长度how long,距离how far等等。例如: They gave the concert last night. → When did they give the concert? 技巧2.辨认结构形式:疑问词+情态动词/助动词/ was / were / did +主语+...? 例如: The accident happened near the station. → Where did the accident happen?
动名词的结构和形式: 动名词的否定结构: 动名词的否定结构由not 动名词组成。如: Trying without success is better than not trying at all. 实验没有成功也比不实验好。 He hated himself for not having work hard. 他悔恨自己没有用功。 I’m sorry for not having telephoned you before. 很抱歉,没有早给你打电话。 He felt sorry for not having done the work well. 他为没有把工作做好感到难过。 I fancy it has done you a lot of good not going. 我看不去对你倒好了。 (not going 是动名词一般式的否定形式) There is no denying the fact that he si diligent. (no denying 也是动名词一般式的否定)
动名词复合结构: 通常情况下,动名词的逻辑主语为谓语动词的主语。如果动名词动作的发出者不失谓语动的主语时,则需要有自己的逻辑主语物主代词或名词所有格加动名词就构成了动名词的复合结构,这种结构在句中可以作主语,宾语等。 (1)逻辑主语是有生命的名词作主语时,必须用名词或代词所有格,作宾语时(尤其在口语中),也可用名词普通个或人称代词宾格。如: Do you think my going there will be of any help? 你看我去会有什么帮助吗?(宾语) The student’s knowing English well helps him in learning French. 这位学生通晓英语对他学法语很有帮助。(主语) Do you mind my(me) smoking ? 你介意我抽烟吗?(宾语) They insist on Mary’s (Mary) going with them there. 他们坚持要玛丽跟他们一起去那儿。(介词宾语) (2)逻辑主语是无生命名词是,通常只用名词普通格。如: Do you hear the rain pattering on the roof? 你听见雨点打在屋顶上了吗? Is there any hope of our team winning the match ? 我们对赢得比赛有希望吗? (3) 逻辑主语是指示代词或不定代词this that , somebody , someone , nobody, none, anybody, anyone 时,只用普通格。如: She was woken up by somebody shouting outside. 她被外面喊叫的人吵醒了。
动名词的形式(一般式,完成式和被动式): (1) 动名词的一般式所表示的动作与谓语动词所表示的动作同时发生,或在谓语动词表示的动作之后。如: We are very interested in collecting stamps. 我们对集邮很感兴趣。 His coming will be of great help to us . 他来对我们大有帮助。 但是有些明确表示时间的动词和介词 after, on,upon, 或for之后,常用一般式代替完成式,表示动作发生在谓语动作之前。如: I shall never forget seeing the Great Wall for the first time.我永远不会忘记第一次看到长城的情景。 On hearing that bad news , the mother couldn’t help crying. 一听到这个糟糕的消息,母亲就禁不住哭了起来。 Excuse me for coming late. 我来晚了,请原谅。 Thank you for giving us so much help. 谢谢你给了我们这么多帮助。 (2) 动名词的完成式所表示的动作或状态在谓语动词之前完成或结束。 He regrets not having taken part in the work. 他后悔没有参加这项工作。 We were praised for having finished the work ahead of time. 我们因提前完成了这项工作而受到了表扬。 (3)动名词的被动式:当动名词的逻辑主语是行为承受者时,用被动语态。如: I like being given harder work. 我喜欢接受难点的工作。 She is proud of being admitted into the university. 她为被大学录取而感到自豪。 The meeting was put off without his having been consulted. 会议延期并未和他商量。 He doesn’t mind having been criticized. 他不介意过去受到的批评。
动名词与现在分词的关系: 动名词它在形式上与现在分词相同,都是在动词原形的词末加-ing。在现代语法中,这两种形式同视为"-ing形式"。 这两种形式的另一个相同之处是: 它们都是由动词变化而成的,它们都保留了动词的某些特征,它们都能带自己的宾语、状语,而构成动名词短语或是现在分词短语去担当句子成分。 例如: Speaking in the public,he will surely be very cheerful . (现在分词短语,作状语)他在公众场所讲话时总是兴高采烈的。 She hates speaking in the public. (动名词短语,作宾语)她不喜欢在公众场所讲话。
动名词和现在分词都可以用于系动词之后作表语,区别方法是: ①作表语的动名词与主语指的是同一件事,此时系动词相当于“是”,通常把主语和表语的位置互换,语法和意思不变,例如: My hobby is swimming.可改为Swimming is my hobby.(可将原句中的主语与表语位置互换) ②现在分词作表语主要用以说明主语的性质,不能与主语互换位置,例如: The story is interesting .不可改为:Interesting is the story. 2.动名词和现在分词都可以用作定语来修饰名词,两者的区别在于: 动名词修饰名词时主要表示该名词的用途,而现在分词修饰名词时性质、状态或动作等。试比较: ①a swimming boy和a swimming suit 前者的意思是“一个正在游泳的男孩”,即a boy who is swimming,现在分词swimming 表示被修饰名词boy的动作; 而后者的意思是“游泳衣”,即a suit for swimming,动名词swimming表示suit 的用途。 ②a sleeping child 和 a sleeping car 前者的意思是“一个正在睡觉的孩子”,即a child who is sleeping,现在分词sleeping 表示被修饰名词 child 正处于的状态; 而后者的意思是“卧车(被用来睡觉的车厢)”,即 a car which is used for sleeping,动名词 sleeping 表示car 的用途。
动名词的用法: 一、动名词作主语 1. 直接位于句首做主语。例如: Swimming is a good sport in summer. 2. 用 it 作形式主语,把动名词(真实主语)置于句尾作后置主语。 动名词做主语时,不太常用 it 作先行主语,多见于某些形容词及名词之后。例如: It is no use telling him not to worry. 常见的能用于这种结构的形容词还有:better,wonderful,enjoyable,interesting,foolish,difficult,useless,senseless,worthwhile,等。 注意:important,essential,necessary 等形容词不能用于上述结构。 3. 用于“There be”结构中。例如: There is no saying when he'll come.很难说他何时回来。 4. 用于布告形式的省略结构中。例如: No smoking ( =No smoking is allowed (here) ). (禁止吸烟) No parking. (禁止停车) 5. 动名词的复合结构作主语 当动名词有自己的逻辑主语时,常可以在前面加上一个名词或代词的所有格,构成动名词的复合结构 (这时,名词或代词的所有格做动名词的逻辑主语)。 动名词的复合结构也可以在句中作主语。例如: Their coming to help was a great encouragement to us.
二、动名词作宾语 1.作动词的宾语 某些动词后出现非限定性动词时只能用动名词作宾语,不能用不定式。常见的此类动词有: admit, appreciate, excuse, stand, advise, allow, permit, avoid, consider, enjoy, finish They went on walking and never stopped talking.他们继续走,说个不停。 I found it pleasant walking along the seashore.在海滩上走真是乐事。 Mark often attempts to escape being fined whenever he breaks traffic regulations. 每当马克违反交通规则时,他常常企图逃避罚款的处分。 2.作介词的宾语 We are thinking of making a new plan for the next term. 我们正考虑为下学期制定新的计划。 Shall we have a rest or get down to doing our work? 我们休息呢还是开始干活? 3.作形容词的宾语 The music is well worth listening to more than once. 这种曲子很值得多听几遍。 We are busy preparing for the coming sports meet. 我们正为马上到来的运动会忙着做准备。
三、动名词作表语 动名词作表语时句子主语常是表示无生命的事物的名词或what引导的名词性从句。 表语、动名词与主语通常是对等的关系,表示主语的内容,主语、表语可互换位置。 Your task is cleaning the windows. 你的任务就是擦窗户。 (Cleaning the windows is your task.) What I hate most is being laughed at. 我最痛恨的就是被别人嘲笑。 (Being laughed at is what I hate most.)
四、动名词作定语 动名词作定语往往表示被修饰词的某种用途。如: a walking stick =a stick for walking=a stick which is used for walking a washing machine=a machine for washing=a machine which is used for washing a reading room=a room for reading=a room which is used for reading a measuring tape=a tape for measuring=a tape which is used for measuring sleeping pills=pills for sleeping=pills which is used for sleeping
介词at, in, on的区别: 1. 表示时间,注意以下用法: (1) 表示时间的某一点、某一时刻或年龄等用 at。如: I get up at six in the morning. 我早上六点钟起床。 He got married at the age of 25. 他 25 岁结婚。 (2) 泛指一般意义的上午、下午或晚上以及月或年等较长的时间,一般用 in。如: We watch TV in the evening. 我们晚上看电视。 He went to Japan in 1946. 他于 1946 去了日本。 (3) 若表示星期几或某一特定的日期,则用 on。如: He left here on the fifth of May. 他于 5 月 5 日离开这儿。
2. 表示地点、场所、位置等,注意以下用法: (1) 表示某一点位置,用 at。如: We live at No 87 Beijing Road. 我们住在北京路 87 号。 The hospital is at the end of the street. 医院在这条街的尽头。 与名词所有格连用表示地点,也用 at。如: at my sister’s 在我姐姐家 at the doctor’s 在医务室 (2) 表示空间或范围,用 in。如: What’s in the box? 这盒子里有什么? He lives in Paris with his wife. 他同他妻子住在巴黎。 但有时两者可换用。如: The meeting was held at [in] the hotel. 会议在宾馆举行。 (3) at 与 in 的另一个区别是:at 用于指较小的地方,而 in 用于指较大的地方。如: in Shanghai 在上海 at the station 在车站 但是,大与小是相对的,有时随着说话者的着眼点不同,大地方也可能用 at(比如把一个大地方看作一个点时)。如: Our plane refuelled at London. 我们的飞机在伦敦加油。 We stopped for an hour at Moscow on our way to Paris. 我们在去巴黎的途中在莫斯科停了 1 个小时。 (4) 介词 on 用于地点,主要指在某物的表面。如: What’s on the table? 桌上有什么? There’s a wallet lying on the ground. 地上有个钱包。 注:在少数搭配中,也用介词 on。如: He works on a farm. 他在农场工作。
3. 在某些搭配中,三者的区别与英国英语和美国英语有关: in the street (英) / on the street (美) 在街上 in the road (英) / on the road (美) 在路上 in the team (英) / on the team (美) 在这个队 at the weekend (英) / on the weekend (美) 在周末 at weekends (英) / on weekends (美) 在周末 4. 有时三者的差别与搭配习惯和用法有关: in bed / on the bed 在床上 in the tree (多指树外之物) / on the tree (多指树本身之物) 在树上
介词besides,but,except的用法区别: 1. 三者都可表示“除外”,但 besides 表示一种累加关系,意指“除了什么之外,还有……”; 而 except 或 but 则表示一种排除关系,意指“除了什么之外,不再有……”。如: Besides his wife,his daughter also went to see him. 除他妻子外,他女儿也去看过他(即妻子女儿都去看过他)。 Nobody went to see him except [but] his wife. 除他妻子外,没有一个人看过他(即只有他妻子去看过他)。 注:在否定句中,besides 也表示“除……之外不再有…… ”,与but, except 同义。如: No one passed the exam besides [except] Jim. 除吉姆外,没一个人通过考试。
2. 关于 but 与 except: (1) 两者都可表示“除……外不再有……”,但含义上略有差别: but侧重指意义的几乎完整性,而 except 则侧重指后面除去的部分。比较: All are here but one. 除一个人都到了。 All are here except one. 还有一个人没到。 (2) 在现代英语中,but 的介词用法十分有限,一般说来,它只能用在下列词语之后: ① no, no one, nobody, nothing, nowhere 等 ② any, anyone, anybody, anything, anywhere 等 ③ every, everyone, everybody, everything, everywhere 等 ④ all, none 等 ⑤ who, what, where 等 Everyone knows it but you. 除你之外大家都知道。 I haven’t told anybody but you. 除你之外,我没告诉任何人。 No one but he [him] showed much interest in it. 除他之外没有一个人对此有很大兴趣。 一般说来,若没有出现上述词汇,就不宜使用介词 but,否则可能造成错句。但是 except 却没有以上限制。比较: 正:The window is never opened except in summer. 除夏天外,这扇窗户从不打开。 误:The window is never opened but in summer. (3) but 一定不能用于句首,except 通常不用于句首: 除我之外每个人都累了。 正:Everyone is tired but (except) me. 正:Everyone but (except) me is tired. 误:But (Except) me, everyone is tired. 注:except for 可用于句首,表示 except 的意思: 正:Except for me, everyone is tired.
3. 关于 except 与 except for: except 主要用来谈论同类的东西,而 except for 则主要用来谈论不同类的东西,有时含有惋惜之意。如: All compositions are well written except yours. 除了你的作文外,其他的作文都写得很好。 His composition is good except for a few spelling mistakes. 他的作文写得不错,只是有几处拼写错误。 注:若用于句首,则 except for 与 except 同义(但 except 通常不用于句首)。
4. 关于 except for 与 but for: except for 主要表示排除,but for 主要表示一种虚拟条件(与虚拟语气连用)。如: Except for me, everyone passed the exam. 除了我之外,大家都通过了考试。 But for my help, she would not have passed the exam. 若不是我的帮助,她就不会通过考试。 But for the atmosphere plants would die. 如果没有大气,植物就会死亡。 5. besides 除用作介词外,还用作副词,其意为“此外”、“而且”,可用于分句句首(通常用逗号隔开)或句尾。如: I don’t want to go; besides, I’m too tired. 我不想去,而且我也太累了。 This car belongs to Smith, and he has two others besides. 这部车是史密斯的,此外他还有两部。