million常见用法解析

million常见用法解析
million常见用法解析

million常见用法解析

今天给大家带来million的用法,我们一起来学习吧,下面就和大家分享,来欣赏一下吧。

百万英镑:million常见用法解析

You think somebody else did the stabbing with exactly the same kind of knife?

The odds are a million to one. - Its possible!

But not very probable. - OK, fellas. Lets take our seats.

Theres no point standing around all over the place.

——12 Angry Men

你认为别人用完全一样的刀刺伤了?

几率是百万比一。- 这是可能的!

但不是很可能。- 好吧,同志们。让我们坐下。

周围没有站的地方。这里

——《十二怒汉》

一、你知道million有几种含义吗?

adj.

1.百万的

Both regions are small economies of a few million people highly dependent on selling goods and services to their neighbors.

两地都是人口只有数百万的小型经济体,都严重依赖向邻居提供商品与服务。

2.无数的

A million questions, all of them unclear, assaulted my jumbled mind.

许多不解的问题充斥了我混乱的脑海。

n.

1.百万

The computer has two million bytes of memory.

该电脑的存储器有两百万单位。

2.无数

Millions of people hunt and fish for a living.

许多人打猎和捕鱼为生。

二、下面我们来学习一下含有million的常见短语

feel like a million

感觉极好,身体很好

feel like a million dollars

感到身体状况极佳特别开心

million instructions per second

每秒百万条指令

三,学会million的用法了吗?来做个测试吧!

The clerk was charged with embezzling $3 _____ from the bank where he worked.

这个职员被指控从他工作的银行盗窃了3百万美元。

语法学习:hundred, thousand和million的用法

1、当与具体数字连用时,习惯上用单数,后不接of。

例:She was prepared to pay five million.

她准备付五百万。

More than 300 people were injured.

有三百多人受了伤。

hundred, thousand和million后面的名词有the, these, those 等限定词修饰时,或其后的接的是us, them ,则此时必须用介词of。

例:

About 200 of them have left there.

他们当中约有200人已经离开了那儿。

2、当这些词表示不确定的泛指数时,则不仅要要用复数,而且要后接介词of,然后才能接名词。

例:

Hundreds of thousands of people packed into the mosque

几十万人挤进了那座清真寺。

A City businessman swindled investors out of millions of pounds

英文写作中数字的正确使用方法

怎么使用数字是我们英文写作中经常遇到的问题,虽然无伤大雅,但细节处见功夫。在此将梳理一下如何在英文写作中使用数字,以飨读者。

首先,除了几个基本的规则外,究竟将数字拼写出来还是使用阿拉伯数字基本上决定于作者的偏好,但是,请在通篇*中保持一致,这一点和参考文献的格式要求类似。

不同的媒体可能使用不同的策略。在美国,有两个影响最大的文献格式,即The Associated Press Stylebook (AP)和The Chicago Manual of Style (CM),它们在数字的使用上略有差异。比如,AP 格式推荐将0到9之间的数字拼写出来,以后都使用数字,直到数字100万。下面是四个超过999,999的数字的写法,1 million; 20 million; 20,040,086和2.7 trillion。

CM格式推荐将0到100之间的数字拼写出来,以后都使用数字,但是整数,例如百(hundred)、千(thousand)、十万(hundred thousand)、百万(million)、十亿都拼写出来。和AP格式不同的是,使用CM格式,我们应该将以下整数拼写出来,比如four hundred,eight thousand, 和twenty million;但是和AP格式一样,CM格式中的401、8,012和20,040,087应写成阿拉伯数字。

总而言之,这是一个复杂的话题,有很多例外。在不同的博客、书籍、报纸和杂志上并不一致。下面列举一些几乎所有媒体都会遵守的规则:

1,句子开头的数字要拼写出来

例子:Twenty-three hundred sixty-two victims were injured.

Nineteen fifty-six was quite a year.

备注:AP格式中的年份写成数字。1956 was quite a year.

2a,数字21到99之间的数字,应该用连接号(hyphenate)连接起来

例子:Thirty-three people were injured in the train wreck.

Twenty-nine of them werehospitalized.

2b,分数应该拼写出来,并且用连接号(hyphenate)连接起来

例子:We recovered about one-thirds of the stolen cash.

One-half is slightly less thanfive-ninths.

备注:有些不需要连接号,比如a third或者a half

3a,四位或者以上数字,使用逗号。每3位数字使用一个逗号,但小数点以后的数字不包括在内。

例子:1,054 people

$2,417,592.22

3b,小于1美元的金额,最好使用分这个计量单位,而不是使用小数。

例子:She had only sixty cents. 或者She had only 60 cents. (Better)

She had only $0.60. (Not advised)

3c,不要重复使用$和dollars

例子:I have $1,255 in my checking account. (Correct)

I have $1,255 dollars in my checking account. (Incorrect)

4a,为了不引起歧义,请使用noon和midnight来表示12:00 PM 和12:00 AM

AM和PM也可以写作A.M.和P.M.,或者a.m.和p.m.,或者am和pm。

例子:8 AM

3:09 P.M.

11:20 p.m.

也有人在时间和AM或PM之间不用空格

例子:8AM

3:09P.M.

11:20p.m.

人教版英语英语现在完成时的用法大全含解析

人教版英语英语现在完成时的用法大全含解析 一、初中英语现在完成时 1.—They say there is a new restaurant near here. —Yes, and it ______ for more than a week. A. has been open B. open C. is opening D. opens 【答案】 A 【解析】【分析】句意:——他们说在这附近有一个新的餐馆。——是的,它已经开了一个多星期了。根据 for more than a week ,可知用现在完成时,have/has been done,故选A。 【点评】考查现在完成时,注意识记其标志词。 2.Mike used to be a top student, but he behind since he lost himself in computer games. A. fell B. has fallen C. was D. has been 【答案】 D 【解析】【分析】句意为“Mike过去是尖子生,但自从迷上电子游戏以来成绩落后了”。由since可知but后的主句用现在完成时,瞬间动词fall不能和since引导的时间状语从句连用,故用延续性动词be。故选D。 【点评】本题考查现在完成时中非延续性动词和延续性动词的转换。 3.—Hi, Tom! you ever the Bird's Nest? —Yes, I have. It's fantastic. A. Have, been to B. Have, gone to C. Did, go to 【答案】 A 【解析】【分析】句意:——你好,Tom!你曾经去过鸟巢吗?——是的,我去过。它是极好的。根据答语—Yes, I have.可知是以have开头的现在完成时的一般疑问句,排除C。have been to+地点名词,去过某地,去了并且回来了;have gone to+地点名词,去了某地,去了还没有回来,在去或者回来的路上。根据It's fantastic.可知去了并且回来了,故选A。 【点评】考查短语辨析,注意平时识记其区别,理解句意。 4.——Where is Mr. Wang? ——He together with his students ________ Zhuyuwan Park. A. has gone to B. have gone to C. has been to D. have been to 【答案】 A

人教版八年级英语下册常用固定搭配总结

八下英语固定用法总结 1.Doing类 Have problems/trouble/difficulty in doing sth Mind doing sth Mind sb doing sth Finish doing sth Do one’s part in doing sth Keep on doing sth Keep doing sth Instead of doing sth Can’t stop/help doing sth Be busy doing sth Be interested in doing sth Succeed in doing sth Consider doing sth Allow doing sth 2.To do 类 Need to do sth Expect sb to do sth Agree to do sth Seem to do sth Wait for sb to do sth Used to do sth Make plans to do sth Ask sb to do sth Decide to do sth Want sb to do sth Want to do sth Learn to do sth Allow sb to do sth Tell sb to do sth Refuse to do sth Offer to do sth Try to do sth It takes some time to do sth Send sb to do sth Have time to do sth Hope to do sth Be able to do sth

(完整版)say-tell-talk-speak的用法和区别

词汇辨析 say、tell、speak、talk的区别 1、say意为“说出”“说过”,强调说话的内容,也可与to连用,say to sb.意为“对某人说”。 eg. He often says“hello”to me with a smile. 他常笑着向我问好。 I can say it in English. 我能用英语说它。 He says to me,“I like my hometown.”他对我说:“我喜欢我的家乡。” 2、tell意为“讲述”“告诉”,作及物动词时,指把一件事或一个故事讲出来,有连续诉说之意。如:tell the truth说实话,tell a story讲故事。tell也可接双宾语结构或复合宾语结构。如tell sb. sth.告诉某人某事;tell sb. about sth.告诉某人关于某事;tell sb.(not)to do sth.告诉某人(不要)去做某事。 eg.-What did your mother tell you just now? 刚才你妈妈告诉你什么了? -She told me not to ride a bike quickly. It's too dangerous. 她告诉我不要快骑自行车,那太危险了。 Please tell me something about yourself.请告诉我关于你自己的一些事情。 3、speak的意思是“说话”,作不及物动词时,通常指说话的能力和方

式;作及物动词时,其后的宾语为某种语言。speak to sb.表示“同某人说话”。 eg. Would you like to speak at the meeting? 你要在会上发言吗? Bob speaks Chinese quite well. 鲍勃汉语说得相当好。 Joe can speak a little Chinese. 乔能说一点儿汉语。 May I speak to Mr. Green? 我可以同格林先生通话吗? (此句常用于打电话用语中) He is speaking to Lily. 他正在和莉莉说话。 4、talk的意思是“谈话,谈论”,指相互之间的谈话,一般用作不及物动词,与介词to或with连用,表示“与……交谈”。而谈及关于某人或某事时,后接介词of或about. eg. They are talking on the phone. 他们正在电话中交谈。 My mother is talking with my teacher. 我妈妈正在和我的老师谈话。We are talking in English.我们正用英语交谈。 What are they talking about? 他们正在谈论什么? We talked about this problem for hours. 我们就这个问题谈了好几个小时。 检测: 用say、tell、speak、talk 的适当形式填空。 1. Excuse me .Can you ___________ me the way to the post office ?

Origin 使用问题

Origin 使用问题集锦 1. 请教怎样反读出 origin 曲线上全部数据点? 如,我用 10个数据点画出了一条 origin 曲线,并存为 project的.OPJ 格式。但,现在我想利用 OPJ 文件从这条曲线上均匀的取出 100个数据点的数值,该如何做?注:要一切都使用 origin 软件完成,不用其他曲线识别软件。 Answer: ORIGIN 中,在分析菜单(或统计菜单)中有插值命令,打开设置对话框,输入数据的起点和终点以及插值点的个数,OK!生成新的插值曲线和对应的数据表格。 2. 如何用origin 做出附件中的图: 其中标注的三角形、方块是怎么整上去的? Answer: 选中左侧竖工具条中的 draw tool(显示是几个点,第七个工具),移动到你要标注的位置双击,就产生了一个点,依次标注完方块。再标注三角的第一个点,标注完后改成三角,以后标注的就都是三角了。改动点的类型的方法和正常画曲线方式一样。 3. 如何用origin 做出附件图中的坐标轴(带刻度)?

Answer: 你把刻度改成那样不就行了。 8.0 的具体方法是双击坐标轴,title & format --> 选左边那个 bottom,然后在右边把 axis 改为 at position=。同理,然后选左边的 left,把axis也改为 at position=。 4. origin能否读取导入曲线的坐标? 一张 bmp 格式的图片,图片内容是坐标系和拟合曲线,但是不知道用什么软件绘制的。请问能否将该图片导入 origin,读出曲线上任意一点的数据? Answer: (1). 1.ORIGIN 有一个图形数字化插件可完成该任务。 2.有许多专门的图形数字化软件也可完成此任务。个人感觉专门的比插件也用、便捷。推荐 WINDIG25 (2). origin下的数字化插件是digitizer,下载地 址:https://www.360docs.net/doc/3118392236.html,/fileexchange/details.aspx?fid=8拖入origin即可,但使用不是很方便。比较方便的是un-scan-it。 5. 如何在origin7.5 中标峰值? 用origin7.5 作的XRD图,怎样直接在峰上标数据? Answer: Tools/Pick peaks 设置一下点击 Find Peaks 就 OK了。Positive和Negative 是标正负峰值的意思,其他数值改变一下就知道干吗用的了。 6. 关于origin 拟合曲线延长的问题? 我想把拟合之后的直线向前或向后延长一段距离与坐标轴相交。但是不知道该怎么弄。是不是要改那个范围的最大值和最小值啊?可是怎么改?

英语现在完成时的用法大全附解析百度文库

英语现在完成时的用法大全附解析百度文库 一、初中英语现在完成时 1.Nancy for five years. A. was dying B. has died C. died D. has been dead 【答案】 D 【解析】【分析】句意:南西去世五年了。A. was dying过去进行时态;B. has died现在完成时态;C. died一般过去时态; D. has been dead现在完成时态。句子强调的是过去开始的动作或状态一直延续到现在,句子用现在完成时态;die是一个非延续性动词,不能与表示一段时间的状语for…连用,用成be dead。故选D。 【点评】本题考查时态辨析。某人去世了多少年就用延续性动词的现在完成时,has been dead。 2.Mike used to be a top student, but he behind since he lost himself in computer games. A. fell B. has fallen C. was D. has been 【答案】 D 【解析】【分析】句意为“Mike过去是尖子生,但自从迷上电子游戏以来成绩落后了”。由since可知but后的主句用现在完成时,瞬间动词fall不能和since引导的时间状语从句连用,故用延续性动词be。故选D。 【点评】本题考查现在完成时中非延续性动词和延续性动词的转换。 3.— Hobo and Eddie the cinema to watch the film Zootopia. — Oh, that's why I can't find them now. A. have gone to B. have been to C. has gone to D. has been to 【答案】 A 【解析】【分析】考查主谓一致。句意:——侯博和埃迪去了电影院看电影《疯狂动物城》。——哦,这就是为什么我现在找不到他们的原因。have gone to去了;been to去过。Hobo and Eddie作主语,谓语动词要用复数形式。所以选A。 4.—What _______ you just now? —Don't worry. Nothing _______.

动词的用法及各种搭配

一、接不定式(而不接动名词)作宾语的24个常用动词afford to do sth. 负担得起做某事 agree to do sth. 同意做某事 arrange to do sth.安排做某事 ask to do sth. 要求做某事 beg to do sth. 请求做某事 care to do sth. 想要做某事 choose to do sth. 决定做某事 decide to do sth. 决定做某事 demand to do sth. 要求做某事 determine to do sth. 决心做某事 expect to do sth. 期待做某事 fear to do sth. 害怕做某事 help to do sth. 帮助做某事 hope to do sth. 希望做某事 learn to do sth. 学习做某事 manage to do sth. 设法做某事 offer to do sth. 主动提出做某事 plan to do sth. 计划做某事 prepare to do sth. 准备做某事 pretend to do sth. 假装做某事 promise to do sth. 答应做某事 refuse to do sth. 拒绝做某事 want to do sth. 想要做某事 wish to do sth. 希望做某事 注:有些不及物动词后习惯上也接不定式,不接动名词:aim to do sth. 打算做某事 fail to do sth. 未能做某事 long to do sth. 渴望做某事 happen to do sth. 碰巧做某事 hesitate to do sth. 犹豫做某事 struggle to do sth. 努力做某事 二、接不定式作宾补的36个常用动词 advise sb. to do sth. 建议某人做某事 allow sb. to do sth. 允许某人做某事 ask sb. to do sth.请(叫)某人做某事 bear sb. to do sth.忍受某人做某事 beg sb. to do sth. 请求某人做某事 cause sb. to do sth. 导致某人做某事 command sb. to do sth. 命令某人做某事 drive sb. to do sth .驱使某人做某事 elect sb. to do sth. 选举某人做某事 encourage sb. to do sth. 鼓励某人做某事

origin8使用小技巧

人人网- 日志分享 1. 请教怎样反读出origin曲线上全部数据点? 如,我用10个数据点画出了一条origin曲线,并存为project的.OPJ格式。 但,现在我想利用OPJ文件从这条曲线上均匀的取出100个数据点的数值,该如何做? 注:要一切都使用origin软件完成,不用其他曲线识别软件。 https://www.360docs.net/doc/3118392236.html,/bbs/viewthread.php?tid=1390313 [1] Answer: ORIGIN中,在分析菜单(或统计菜单)中有插值命令,打开设置对话框,输入数据的起点和终点以及插值点的个数,OK!生成新的插值曲线和对应的数据表格。 2. origin中非线性拟合中logistic模型的疑问? origin 中非线性拟合中的logistic模型为 y = A2 + (A1-A2)/(1 + (x/x0)^p) 其初始参数设置为 sort(x_y_curve); //smooth(x_y_curve, 2); x0 = xaty50( x_y_curve ); p = 3.0;

A1 = max( y_data ); A2 = min( y_data ); A1 = min( y_data ); A2 = max( y_data ); 而据我看到的logistic的模型都是(自己origin中自定义的) y =A1/(1+(A1/A2-1)*exp(-k*x)) 也就是说 origin 中的logistic有4个数值需要确定,而自定义的有3个数值 从结果来看,没有太大区别,但为什么函数不一样呢? 不是学数学,高人能否详细说明下。 https://www.360docs.net/doc/3118392236.html,/bbs/viewthread.php?tid=1391522 [2] Answer: 你可以看一下这个文档,里面有数种不同形式的 logistic 模型: https://www.360docs.net/doc/3118392236.html,/web/packages/drc/drc.pdf [3] 当然,这是一个 R (https://www.360docs.net/doc/3118392236.html,) 包的文档,但不妨碍你看其中的公式。 R 是开源的啊,以 GPL 发布,可以从 https://www.360docs.net/doc/3118392236.html, [4]上了解更多。I 3. 如何用origin做出附件中的图:其中标注的三角形、方块是怎么整上去的?https://www.360docs.net/doc/3118392236.html,/bbs/viewthread.php?tid=1393739 [5] Answer:

现在完成时的用法解析

Lead in 一般过去时导入:一般过去时的概念 一般过去时表示过去某个时间发生的动作或存在的状态。 I lost my pen.(过去时) I have lost my pen.(现在完成时) 过去时一般表示过去所发生的动作或存在的状态。“我把笔丢了”,说话人只是想告诉对方在过去的某一个时间里他的笔丢了,仅此而已。(仅仅是在陈诉过去的一个事实,与现在没有关系) New lesson 一.现在完成时的构成: 助动词have/has(not) +动词过去分词 She has turned on the lights. 肯定式:have/ has+过去分词 否定式:haven’t/hasn’t+过去分词 疑问式:把have/has 提到主语前面 肯定回答:Yes,…have/has 否定回答:No,…..haven’t/hasn’t 二.用法 1.表示过去发生的动作对现在造成的影响或结果. 例如:She has gone. 她走了. She went in the past.(She is not here

now.) I have just cleaned my hands. 我刚洗过手。(“洗手”是发生在过去的动作,对现在造成的结果是“手干净了”) I have closed the door. (The door is close now.) She has turned on the lights. (The lights are on now.) He has written his name on the blackboard. (The name is on the blackboard now.) Mother has cooked the dinner. (We can have dinner now.) You have seen the film. (You know what the film is about.) We have cleaned the classroom. (The classroom is clean now.) 2. 表示动作发生在过去,并且一直延续到现在,甚至还可能继续延续下去。这时常和since所引导的短语或从句或for引导的短语连用(for有时可以省去)。以及so far, by now, these days, in the last/past … years/days…等连用。 I have lived here for over ten years. (表示他现在还在这里居住,并且还有可能继续住下去)比较:I lived here ten years ago.(仅仅说明了他十年前在这里记住过的事实,不代表现在他还住在这里) He has studied here since 2006. 都用How long 提问,例: We have learned English for three years. We have learned English since three years ago.

常用介词及副词的搭配用法归纳

常用介词及副词的搭配用法归纳 (-)about about既可以用作介词也可以用作副词,它常和下列名词,动词,形容词搭配使用。 名词+about talk about 关于???谈话;information about/on 关于???知识,消息 动词+about think about sth. 考虑某事look about 环顾;考虑 bring about 带来,造成,引起leave about 乱放 come about 发生go about 四处走动 get about 走动,传开,着手干set about 开始,着手 hang about 逗留,徘徊put about 传播谣言 turn about 回首,转身,轮流tell sb.about sth. 告诉某人某事 grief about sth. 对…伤心confuse sb.about sth 使某人对某事感到混乱bother sb.about sth 为某事打扰某人gossip about sb.or sth.谈论、闲聊某人或事某形容词+about hopeful about/of 希望,期待particular about 对…讲究,特别 enthusiastic about 对…热心crazy about ab./sth. 对…欣喜 sure about/of 对..确定知道,对…有把握 anxious about 对…担忧,焦虑anxious for 渴望 careful about/of 注意,保护,保重careful with 对…注意,照顾 careless about 对…不留心feel nervous about/at sth. 对…感到不安 doubtful about/of 对…感到好奇optimistic about 对…感到乐观 happy about/at sth. 因某事而感到高兴 (二)across across 既可以用作介词也可以用作副词,它常与下列动词搭配使用。 come across 横越…,偶尔碰见run across 跑着穿过;偶尔碰见 cut across 抄近路穿过get across 惹(某人)不高兴;通过 get sth. across 领会put across 哄骗put sth. across 使人听懂 (三)against against 只用作介词,常与下列名词或动词搭配使用。 1)名词+against grudge against 对…怨恨declaration against 反对…声明或宣言 hostility against 对…敌意battle against 反对…的斗争 2)动词+against swim against the current/tide 逆流而泳run against the wind 逆风而跑 work against 反对,抢时间defend against 团结起来反对… side against 与别人站在一方反对…人rebel against 反,反抗… stand against 反对…prejudice against 对…有偏见 rise against 起来反对…argue against 抗议,反对… …反抗strike against 抗议,反对protest against

插入语用法归纳

插入语用法归纳 插入语用法很多,在句子中的位置比较灵活,在学习中应当认真去体会。大体而言,插入语可以分为以下几类: 1. 用简短的句子结构作插入语。这类短语有:I think, I hope, I guess, I believe, I suppose, I wonder, I tell you, I say, I'm afraid, I'm sure, you see, you know, as you know, that is, that is to say, what's more等等,它们可以置于句中或句尾。如: I suggest you choose someone who you think is kind and friendly. This diet, I think, will do good to your health. It won't be raining long, I hope. You will have to work harder, you know, if you want to succeed. 2. 副词或副词短语用作插入语,这类插入语一般放在句首或句尾。如: Happily for him, his father's second wife was kind to him too. You'll be able to pass the coming exam, surely. Luckily for him, he didn't hurt in the accident. Honestly, I don't need it at the moment. 3. 介词或介词短语作插入语,这类插入语一般放在句首,有时也可放在句中。如: Like most of my schoolmates, I have neither brothers nor sisters-in other words, I'm an only child. By the way, Bob sends his best wishes. On the other hand, I didn't know you were there. In short, things have begun to improve since schools were called on to reduce learning load. 4. 分词短语作插入语。如: Judging from your accent, you must be from England. Generally speaking, he is the best student in our class. Compared with China, the USA is smaller. 5. 不定式短语作插入语。如: To put it mildly, he was not up to the mark. To tell you the truth, I don't want to see her. To be sure, Jim is a faster skater, but he is not good at doing figures. To conclude, it was a great success. 在日常交际用语和书面表达中,插入语频频出现。英语中的插入语(Parenthesis)是插在句子中的一个词,短语或从句,通常被逗号、破折号或句子的其他部分隔开,它与句子的其他部分之间没有语法上的关系,因此,有的语法学家将其归为独立成分。 插入语在句中通常是对一句话的一些附加解释,说明或总结;有时表示说话者的态度和看法;有时起强调的作用;有时是为了引起对方的注意;还可以起转移话题或说明事由的作用;也可以承上启下,使句子与前面的语句衔接的更紧密一些。 插入语大致可分为以下10种类型: 1. 形容词或形容词短语作插入语

tell地用法和常见搭配

tell的用法和常见搭配 tell的中文含义是:说;告诉;讲述。 例句:Tell him to wait for a few minutes, please. 请告诉他等几分钟。 tell一般用作及物动词,常用于tell somebody to do something这个结构中,表示“要某人做某事”,如:Tell the kids to be quite, please. 请告诉孩子们保持安静。类似的结构还有ask somebody to do something。 tell还常用于tell somebody something和tell somebody about something这两个结构中。两个结构都有“告诉”的意思,它们的区别是:tell somebody something告诉某人某事(往往是不需要解释、说明的事);tell somebody about something向某人讲述某事(往往含有解释、说明的意味)。试比较: Tell me your phone number. 告诉我你的。 Please tell me something about your school life. 请给我讲讲你的校园生活吧。 常用搭配: tell somebody to do something 告诉某人去做某事 tell somebody something 告诉某人某事 tell somebody about something 向某人讲述某事 speak, talk, say, tell的用法区别 这四个词的用法辨析是中考英语中考得最经常的同义词辨析之一。综观各省市的中考英语真题情况,我们发现,中考对这四个词的考查主要侧重于其用法差异和习惯表达方面的不同。因此,本文拟在这两个方面谈谈它们的具体用法和区别。 一、用法方面的区别 1.speak 强调单方的“说”或“讲”,一般用作不及物动词,要表示“对某人说(某事)”,可用 speak to [with] sb (about sth)。如: Please speak more slowly. 请说慢一点。 I spoke to [with] the chairman about my idea. 我跟主席说了我的想法。

英语现在完成时用法总结含答案解析百度文库

英语现在完成时用法总结含答案解析百度文库 一、初中英语现在完成时 1.—What _______ you just now? —Don't worry. Nothing _______. A. has happens to; has happened B. happened; happened C. happened; has happened D. happened to; has happened 【答案】D 【解析】【分析】句意:---刚才你发生了什么事?---别担心,没什么事发生。固定句式What happened to……发生了什么?第二空是回答之前并没有发生任何事情,所以不必担心,用现在完成时,has happened,故答案为D。 【点评】考查动词时态,一般过去时表示过去某个时间发生的动作;现在完成时表示过去的动作对现在造成的结果或影响。 2.—How do you like Beijing, Miss Read? —I've no idea. I _____ there. A. have gone B. have been C. haven't been D. haven't gone 【答案】 C 【解析】【分析】句意:---你觉得北京怎么样,瑞得小姐?---我不知道,我没有去过那儿。短语:have been to去过某地(已经返回);have gone to去了某地(尚未返回),根据句意,故答案为C。 【点评】考查短语辨析,区分have been to与have gone to,理解句子,根据语境判断答案。 3.This museum here for over 80 years. It one of the oldest buildings in this city. A. is; was B. had been; is C. was; has been D. has been; is 【答案】 D 【解析】【分析】考查动词的时态。句意:博物馆在这儿有八十多年了。它是这座城市最古老的建筑之一。前句表示从过去一直延续到现在的状态,用现在完成时态;后句表示的是现在的状态,用一般现在时态。故选D。 4.My mother a good example for me since I was young. A. was B. has been C. will be D. is 【答案】 B 【解析】【分析】句意:打小以来,妈妈就是我的好榜样。根据时间状语“since l was young”可知,主句应用现在完成时,表示动作从过去一直持续到现在。故选B。

(完整word版)初中现在完成时讲解练习

现在完成时精讲和专练 I.定义: 表示过去发生或已经完成的动作对现在造成的影响或结果,也可以表示过去已经开始,一直延续到现在的动作或状态 II.现在完成时的结构 简略答语: 注意:表示短暂时间动作的词,如:come,go,die,marry,buy等的完成时不能与for,since等表示一段时间的词连用。用来持续的动作或状态或表过去重复的动作,如live,study,be,wait等,常和since(自从)或for(经历)引导的词语连用。 如:I have lived here for more than thirty years.我已在此住了30多年。 III.现在完成时的标志 1.现在完成时的含义之一是过去完成的动作对现在仍有影响, 现在完成时通常和,ever, never, twice(once…), so far(到目前为止), since,for,in the past/last few years(在过去几年), already(肯定句), yet(否定,疑问句), just(刚刚), before(以前), recently(近来)等词连用 说明:already与yet都有“已经”的意思,但already常用于肯定句,并用于句中。yet常用于否定句和疑问句,并用于句末。例如: I have already finished my homework. I haven’t finished my homework yet. Have you finished your homework yet? They have left. (他们已经离开了,也就是说现在他们人不在这里) I have had my lunch. (我已经吃过午饭了,也就是说我现在不饿) I can’t find my watch now. I think I have already lost it. 2.过去已经开始的动作一直延续到现在, 甚至有可能继续延续下去,我们可以从动作“延续”的特性和“时间”点段的区分入手。 ①for+时段②since+过去一个时间点(过去从句)为标志 注意:1)现在完成时不能单独与过去的时间状语连用, 如yesterday, last week, three years ago 等; 2)不能与when连用 IV.现在完成时的用法

现在完成时的用法讲解修订版

现在完成时的用法讲解集团标准化小组:[VVOPPT-JOPP28-JPPTL98-LOPPNN]

现在完成时的讲解 对所学时态的回顾,引入现在完成时 通过数轴来概括讲解所学的四个时态:一般现在时、现在进行时、一般过去时、一般将来时。 (导入)有时候,这4种时态还不能满足我们表达的需要。比如:表示“某人过去曾经做过某事”或者“某人做某事多久”,以上五种时态就派不上用场了。这时,我们可以用一种新的时态——现在完成时表示。同样也用数轴来表示一下。 一现在完成时的构成:主语 + have/has + 过去分词 (过去分词:规则动词的过去分词构成与动词过去式相同;不规则动词需要特殊记忆。 eg .I have taught English in this school since 1999. 二、否定式:主语 + haven’t/hasn’t + 过去分词。 疑问式: Have /Has + 主语 + 过去分词 简略答语: Yes, 主语 + have/has.(肯定) No, 主语 + haven’t/hasn’t.(否定) —Have you finished your work — Yes,I have. 三现在完成时的含义之一表示过去发生或已经完成的动作对现在造成的影响或结果, 常与already/yet,just,never/ever,before, so far等连用。这些标志词可以表达这种含义. 1.already意为“已经”,通常用于肯定句中,可放在助动词之后,过去分词之前,也可以放在句末。实例: 1)I've already read this book. 我已经读过这本书了。 (“读”这一动作发生在过去,对现在造成的影响是“知道书中的内容”。) 2)I've washed my clothes already.我已经洗了衣服。 (洗衣服的动作已完成,其结果是“衣服冼干净了”。) 注意:在表示吃惊或明知故问等感情色彩时,already也可用于(口语)疑问句中。实例:3)Have you met him already 你(真的)已经见过他了 2.yet用在疑问句中意为“已经”,用在否定句中意为“还”,常放在句末。实例:1)—Has he found his watch yet 他已经找到他的手表了吗 —No,not yet.不,还没有。

say, talk, tell, speak的区别、用法及练习(附答案)

say, talk, tell, speak的用法及练习

练习一:用say, talk, tell, speak的适当形式填空。 1.Don't him about our plans. 2.I waited for an answer, but she didn't a word. 3.He that he would wait for me at the library. 4.He us that he was going to buy a new car. 5.Do you English? https://www.360docs.net/doc/3118392236.html,e here, Mike. We need to . 7.To you the truth, I don't remember anything. 8.Did the director at the conference? 9.Do you know how to good-bye in Arabic? 10.We spent the whole evening about old friends. 11.They nothing to me. 12.What did Eric when he saw the new bike? 13.She ____ several languages. 14.He ____ for about an hour. 15.He ____ a lot of nonsense. 16.It was an interesting ____. 17.He's always ____ behind people's backs. 18.If it's worrying you, you should ____ your mind. 19.There's a serious problem- I think we should ____. 20.We ____ things over and everything's OK between us now. 21.It's just ____- they'll never actually do it. 22.She ____ in her sleep. 23.It goes without that we will pay for the expenses. 24.It's no use expecting me to because I promised I'd keep the secret. 25.Let's he offers the job to you. Would you accept it? 26.Don't anyone. We don't want the neighbours to start talking. 27.Pull yourself together and stop nonsense. 28.I don't know how we will communicate. I don't a word of Chinese. 29.She always her prayers before lunch.

Origin 使用问题集锦

1. 请教怎样反读出origin曲线上全部数据点? 如,我用10个数据点画出了一条origin曲线,并存为project的.OPJ格式。 但,现在我想利用OPJ文件从这条曲线上均匀的取出100个数据点的数值,该如何做?注:要一切都使用origin软件完成,不用其他曲线识别软件。 https://www.360docs.net/doc/3118392236.html,/bbs/viewthread.php?tid=1390313 Answer: ORIGIN中,在分析菜单(或统计菜单)中有插值命令,打开设置对话框,输入数据的起点和终点以及插值点的个数,OK!生成新的插值曲线和对应的数据表格。 2. origin中非线性拟合中logistic模型的疑问? origin 中非线性拟合中的logistic模型为 y = A2 + (A1-A2)/(1 + (x/x0)^p) 其初始参数设置为 sort(x_y_curve); //smooth(x_y_curve, 2); x0 = xaty50( x_y_curve ); p = 3.0; if( yatxmin( x_y_curve ) > yatxmax( x_y_curve ) ) { A1 = max( y_data ); A2 = min( y_data ); } else { A1 = min( y_data ); A2 = max( y_data ); } 而据我看到的logistic的模型都是(自己origin中自定义的) y =A1/(1+(A1/A2-1)*exp(-k*x)) 也就是说origin 中的logistic有4个数值需要确定,而自定义的有3个数值 从结果来看,没有太大区别,但为什么函数不一样呢? 不是学数学,高人能否详细说明下。 https://www.360docs.net/doc/3118392236.html,/bbs/viewthread.php?tid=1391522 Answer: 你可以看一下这个文档,里面有数种不同形式的logistic 模型: https://www.360docs.net/doc/3118392236.html,/web/packages/drc/drc.pdf 当然,这是一个R (https://www.360docs.net/doc/3118392236.html,) 包的文档,但不妨碍你看其中的公式。 R 是开源的啊,以GPL 发布,可以从https://www.360docs.net/doc/3118392236.html,上了解更多。

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