人教版高中英语必修2unit3课文知识点详解
人教版必修2Unit3解析
人教版必修2Unit3解析小编今天整理人教版必修2Unit3的解析，如果有需要的同学们可以收藏起来参考一下。
Unit3 Computers知识点详解Ⅰ. 常考单词必背1.simplify vt. 简化Try to simplify your explanation for the children.设法让你的解释简易一些，让孩子们能听懂。
[快速闪记]simplified adj. 简化的simplification n. 简化2. sum n.总数;算术题;金额v.合计In sum，the course is clear.总而言之，这个过程是清晰的。
[快速闪记]in sum 总之，总而言之sum up 概括;合计sum up to 总计为3.intelligence n.智力;聪明;智能Computer scientists study artificial intelligence.计算机科研人员研究人工智能。
[快速闪记]intelligent adj. 智能的;聪明的4. solve vt. 解决;解答Can you help me to solve this maths question?你能帮我解答这个数学问题吗?[快速闪记](1) solve/settle/deal with problems 解决问题(2) solution n. 解决，解答5.total adj. 总的;整个的 n. 总数;合计In total，they spent 420 hours on the project.他们在这项工程上总共花了420 个小时。
[快速闪记]totally adv. 完全地;整个地6.application n.应用;用途;申请There were more than 300 applications for the six jobs.有300多人申请这6份工作。
[快速闪记]apply v. 应用，运用，申请，请求7. explore vt.&vi. 探索;探测;探究The scientists are exploring all possible ways to improve food production.科学家们正在探究所有可能提高食品产量的方法。
人教版高中英语必修2Unit3知识点详解
Part 1. Warming up1.In pairs discuss what they have in common.common adj.共同的，普遍的；常见的常用结构：in common 共有，公用(在句中多作状语）have nothing/little/a lot/something in common (with) sb.与某人没有/许多/有些共同之处in common with 和……一样common sense/knowledge 常识common welfare 公共福利Jane and I have nothing in common.=I have nothing in common with Jane. 我与简毫无共同之处。
In common with many young people, he prefers pop songs.和许多年轻人一样，他喜欢流行歌曲。
2.Work out a list and compare it with your partner.compare...with/to...把。
和。
作比较Compare this with/to that, and you’ll find which is better.把这个和那个比较，你就知道哪个更好了。
注意：（1）compare...to...还有“把。
比作。
”之意，不可用compare...with...替换。
Shakespeare compared the world to a stage.莎士比亚把世界比作一个舞台。
（2）过去分词短语compared with(与。
相比）作状语时，可与compared to替换。
Compared with/to most children,she was indeed very unfortunate.与多数孩子相比，她确实很不幸。
3.calculate v.calculate on/uponbe calculated to dobe calculated for适合于，为。
新教材 人教版高中英语必修第二册 unit3 The internet 精品教学课件(共142页)
学以致用 完成句子 (1)他整个下午都在上网和朋友聊天。 He has been on the computer all afternoon,chatting with his friends . (2)我和她闲聊了好久。 I had a long chat with her.
3.【教材原文】And so I use a nonsense name for my net identity.(Page 27)
(4)A working party has been set up to look into the problem.
(5)Looking at these photos,I can’t help looking back on my childhood.
(6)She is looked on as the leading figure on the subject.
语境领悟
(1)At last things were beginning to look up. 情况终于开始好转了。
(2)I looked up the new word in the dictionary. 我在词典里查过这个生词。
(3)I look on her as one of my closest friends. 我把她看作我最亲密的朋友之一。
我为我的网上身份胡乱用了个名字。 考点identity n.身份;个性
an identity card (ID card)身份证 identify vt. 认出;确认 identification n. 识别;鉴定;确认
语境领悟
(1)Before checking in for your flight,you must show your identity card.
高中英语人教版必修2 Unit3 Grammar
去分词）
e.g. He was sent to the hospital immediately after the accident.
3) 一般将来时的被动语态 (will/shall + be + 过去分词 或+be going to + be + 过去分词) e.g. The work will be finished soon.
Things that have been done well
Things that have been done badly
the way the flowers have been planted the way the grass has been cut
the way the paths have been swept
不能用在现在完成进行时态的动词， 如：be, have, like, love, know, believe, hate等。
一般过去时则是表示过去某时发 生的动作或情况, 与现在毫无关系。
2) 现在完成进行时 (have/has + bee) 一般现在时的被动语态 (am/is/are + 过 去分词）
Look at the way t_h_e__ta_b_l_e_h_a_s__b_e_e_n_l_a_id____ Look at the wayt_h_e_g_l_a_s_se_s__h_a_v_e_b_e_e_n__p_la_c_ed Look at the way t_h_e__fo_o_d__h_a_s_b_e_e_n__c_o_o_k_e_d_ _Y_o_u_’_d_b_e_t_te_r__d_o_t_h_e_m__a_g_a_i_n_. _
人教版高中英语必修2unit3课文知识点详解
standing there?
9.“One World,One Dream” fully reflects the essence (实质) and the universal of the Olympic spirit. 10.The invention of the television caused a values
sign更侧重于区别性或指示性的标志。 （4）symbol指被人们选出的物体或图案，用来代表 另一事物，作为该事物的标记或象征。 The dove is the symbol of peace.
归纳总结
calculate v.计算；打算；推测。 calculate on/upon指望；打算 It is calculated that...据估算„„ be calculated to do打算做；故意做
be calculated for适合于
即学即用 （1）这些广告旨在吸引年轻的单身消费者。
when I went to college.
4.People will build a large artificial (人造 的) lake in the new park.
5.Before going to school,all the children are given an intelligence (智力) test. 6.Difficulties will arise as we do the work. 7.P ersonally ,I prefer to go to Beijing for my holiday. 8.Do you know that football coach who is
从„„中产生。
易混辨异
人教版高中英语选择性必修第二册unit3语言点
eg The minimum number of students we need to run the course is fifteen. (翻译) 我们开设这门课程需要的学生人数至少为 15 人。
【归纳拓展】（阅读理解常出现）
senior to... 比……年长的 junior to... 比……年轻的 prior to... 在……之前的 inferior to... 比……差的 superior to... 比……好的
Note：高中 senior middle school 初中 junior middle school
3) Tom is a person consumed with ambition. _汤__姆__是__一__个__满__怀__抱__负__的__人__。___________
高中英语 选择性必修第二册 UNIT 3 FOOD AND CULTURE
教材原句p.27Or，that those who like spicy food tend to have a hot temper? 或者，喜欢辛辣食物的人脾气容易暴躁？ 7 tend vi. 趋向；易于；照管 vt. 照顾；招待 tend to do sth. 易于做某事，往往会发生某事，倾向于 =have a tendency to do sth tend（to）sb./sth. 照顾……，照料…… People in adolescence tend to be addicted to computer games. 人们在青少年时期容易沉迷于电脑游戏。 His mother fell ill. He stayed in the bedroom tending（to）her. 他的妈妈生病了，他待在卧室中照顾她。
高中英语人教版必修二Unit-3知识点汇总及强化练习
Unit 3 Computers 单元要点预览Ⅰ词语辨析Ⅱ词性变化Ⅲ重点词汇1. sum n. 金额; 款项; 总数; 总和[典例]1). He was fined the sum of 200. 他被处以200英镑罚金。
2). The sum of 5 and 3 is 8. 5加3的和是8。
[重点用法]in sum简言之; 总而言之sum sb/sth up形成对某人[某事物]的看法[练习] 中译英1). 总之, 计划告吹了。
______________________________________________________________________ 2). 我认为她是个很能干的经理。
______________________________________________________________________2. advantage n.优点；优势；有利条件[典例]1). He has the advantage of a steady job. 他有工作稳定的有利条件。
2). They took full advantage of the hotel's facilities. 他们充分利用旅馆的设备。
[重点用法]take advantage of 对……加以利用；欺骗to sb.’s advantage 对某人有利have /get/win an advantage over 〔of〕胜过；优于[练习] 中译英1).协议对我们有利。
______________________________________________________________________ 2).她利用了我的慷慨。
______________________________________________________________________3. goal n. 球门；进球得的分；目标[典例]1). He headed the ball into an open goal. 他乘虚把球顶入球门2). We won by three goals to one 以三比一获胜。
Unit 3 The Internet 知识点课件 高中英语人教版(2019)必修第二册
改写划线句子为定语从句： There are countless articles which / that tell us how ...
make + 宾语 + 宾补: eg. I want to make it clear that I don’t agree with your plan.
很多离和她婚爸在的爸努父一力亲只起消。己的孩子。
Important sentences (P28 ~ P29)
1. There are countless articles telling us how the Internet has made our lives more convenient. 讲述互联网如何使我们的生活变得更加方便的文章数不胜数。
The Internet has brought great _b_e_n_e_f_it_s__ to Wuzhen, a small
waterside town in Zhejiang Province. For the past few years,
Wuzhen has hosted the World Internet Conference (WIC), which makes life in this ancient town much more _c_o_n_v_e_n_ie_n__t than it has been. Residents here can _s_u_r_f online as easily as in large modern cities. Plus, they can _d_o_w__n_lo_a_d__ movies and music at
Unit 3 Using language 课文讲解课件-高中英语人教版(2019)选择性必修第二册
as with的意思是：如同，和......一样，就...... 而言
Finally, a fundamental key to healthy eating is to eat slowly. It
takes about twenty minutes from the time you start eating for your brain
The doctor insisted that he ( should )be
examined.
He insisted that he was right.
driver 在此意为“推手” drive vt. 推动；驱使 as it is 是一种语言衔接结构，意为“事实上，实际情况是”，多用 来陈述一种原因或状况。
alone.The American Heart Association recommends that we limit ourselves to less than 100－150 calories a day from su宾ga语r,从w句hich is less
than what is usually contained in one can of sweet drink or in a single candy bar . In other words, if you want to be healthy，you have to cut
food mostly for nutrition, then you are on the right track with your diet.
However, if food has become the centre of your life, you might be on
人教版高中英语必修2unit3课文知识点详解
3.And my memory became so large that even I couldn’t believe it!我的记忆能力变得如此 巨大，甚至连我自己都不能相信！ so+adj./adv.+that...意为 考点提炼 “如此……以致…… ”，引导结果状语从句。 so that引导目的状语从句，相当于in order
Don’t fire until I signal.
等我发出信号后再开枪。 He signalled to the waiter for the bill. 他示意服务员结账。 A red light is a signal of danger.
红灯是危险的信号标志。
归纳总结 signal vi.& vt.发信号；n.信号 。 易混辨异 signal,sign,mark,symbol (1)signal常指约定俗成、用于传达某些信息的信 号，也指灯光、声音或信号标志。
Unit 3
Ⅰ.高频单词思忆
Computers
基础落实
1.The development of the steam engine was a great technological (科技的) advance. 2.I haven’t calculated (计算) the result of the maths problem. 3.Life totally/completely (完全地) changed
that,该从句中常用情态动词may,might,can,
could,will,would和should。
4.After all,with the help of my electronic brain which never forgets anything,using my intelligence is what I’m all about!不管怎 么 样，在我过目不忘的电子脑的帮助下，运用智能 就考点提炼
人教版高中英语必修2unit3课文知识点详解(第一课时)
arise vi.出现； 发生；起因于 arouse vt.唤醒， 激起 rise vi.升起；起 身；增长；上升 raise vt.举起；唤 起；提高；饲养
过去式 arose
aroused rose
过去分词 arisen
aroused risen
I arose early in the morning.
我早上起得很早。
归纳总结 arise vi.出现，发生；上升 。 (1)作“呈现；出现；发生”之意时，主语多为以下 抽象名词： argument/problem/quarrel/question/movement。 （2）arise from由„„而引起，由„„而产生；
电脑由许多不同的零件组成。
He is making up stories.Don’t trust him. 他在编故事。别信他。 She spent two hours making herself up before the party.她在参加聚会前用了两个小时化妆。
归纳总结 make up 组成 ； 编出 ；和解，言归好； 化妆 ， 打扮；弥补；把„„补上。 make up for sth.弥补；补偿 make for朝某方向移动 make full/good/the best use of (=make the
the chance that
someone will be sent abroad for further
6.make up
In this way I can make up new moves using my“artificial intelligence”.(回归课本P23)
观察思考
A computer is made up of many different parts.
人教版高中英语必修2Unit 3课文讲解
必修2 Unit 3
1.New Words P91
2.将生词标注到课文里。
必修2 Unit 3 课文讲解
WHO AM I? Over time经过一段时间 I have been changed quite a lot改变很多. I began as a calculating machine计算机 in France in 1642. Although I was young I could simplify 简化difficult sums数学题. I developed very slowly 发育迟缓and it took nearly two hundred years before I was built制成 as an analytical machine一 台分析机 by Charles Babbage.
必修2 Unit 3词语拓展2
Logy n. 逻辑 Logical adj. 逻辑的 Logically adv. 逻辑 Technology n. 科技 Technological adj. 科技的 Technologically adv. 科技地 Intelligence n. 智力 Intelligent adj. 智能的 Intelligently adv. 智能地
必修2 Unit 3 课文讲解
And my memory became so large that even I couldn’t believe it! But I was always so lonely standing there by myself, until in early 1960s they gave me a family connected by a network用互联网连成的家. I was able to share my knowledge分享我的 知识 with others through the World Wide Web万维网.
Unit3TheInternet（知识点梳理）-高一英语新教材知识讲学（人教版必修第二册）
人教版新教材高一英语必修二知识点梳理Unit 3 The Internet1. convenient adj.便利的，方便的；近便的(1) It is convenient (for sb.) to do sth. (某人)做某事方便。
be convenient for sb. / sth. 对某人/物来说是方便/近便的(2) at one's convenience在某人方便的时候for ( the sake of) convenience为方便起见e.g. ①It is convenient for me to go there. 我去那儿很方便。
②Our house is very convenient for our children's school. 我们家到孩子们的学校很近。
③Can you telephone me at your convenience to arrange a meeting?你能不能在你方便时给我来个电话，安排见一次面？④For (the sake of) convenience，the library books are separated into different categories. 为方便起见，图书馆的书被分成不同的类别。
温馨提示：convenient作表语时，不可用人作主语，要用物作主语或用it充当形式主语。
表达“如果你方便的话”时，应用if it is convenient for you。
表达“在你方便的时候”时，应用when it is convenient for you。
2. stuck adj. 卡住；陷（入）；困（于）(1) be / get stuck in被困在……be stuck with遇到困难无法进行下去；无法摆脱(2) stick to 坚持；信守e.g. ①Have you ever been stuck in a traffic jam? 你曾经遇上过堵车吗？②Will you help me with this mathematical problem? I'm stuck with it. 这道数学题你能帮我一下吗？我怎么也解不出来。
新教材 人教版高中英语必修第二册Unit3 The Internet 知识点提炼(单词短语语法等)
Unit 3 The Internet①blog n.博客vi.写博客②blogger n.博客作者；博主③engine n. 引擎；发动机；火车头④chat vi. 聊天；闲聊⑤stream v.流播；流动n.小河；溪流⑥identity n. 身份；个性⑦blog post 博文；博客帖子⑧search engine 搜索引擎⑨identity card 身份证语境串记多义词1.We can network with our customers by networking our computers so that our network is more popular.我们可以通过把我们的计算机联网与客户建立网络系统以使我们的人际网更受欢迎。
2.To benefit ourselves, we can take online classes to study how to use the Internet, which will make us benefit from the Internet benefits.为了使自己受益，我们可以参加在线课程学习如何使用互联网，这将使我们受益于互联网的好处。
3.The program of the Internet plus will make everyone gain more plus in development, plus, we can more easily understand that one plus one is more than two.“互联网＋”项目将使每个人在发展中获得更多的优势，此外，我们可以更容易地理解一加一大于二。
句型公式1.whenever意为“无论何时；随时，只要”时，引导让步状语从句。
2.so...that...意为“如此……以至于……”，引导结果状语从句。
3.now that(＝since/while)可以引导让步状语从句，意为“既然，由于”。
人教课标版高中英语必修2 Unit3_单元语法详解
Unit3 单元语法详解现在完成时的被动语态现在完成时的被动语态的用法是高考的重要考点，学习时应该注意下列几点：一、掌握现在完成时的被动语态的构成现在完成时被动语态的结构为has/have been done，使用has been done时主语为第三人称单数形式，使用have been done时主语为其他人称。
如：This book has been translated into many languages. 这本书已被译为多国语言。
His bikes have been sold out. 他的自行车已都卖完了。
例1单句填空More patients (treat)in hospital since last year.思路分析：粉本题考查动词的时态和语态。
解题要考虑时间状语与时态的对应关系和主被动关系。
解析：根据题干中的时间状语since last year可断定应用现在完成时，而patients与treat之间存在被动关系，故用被动语态。
答案：have been treated二、理解现在完成时的被动语态的概念现在完成时的被动语态强调一个发生在过去的被动性动作，它有两层意思：（1）动作已经完成，强调对现在造成的影响或结果。
（2）主语与谓语动词之间为被动关系。
如：Our classroom has been cleaned;you needn't clean it now.我们的教室已经被打扫过，你现在没必要再打扫了。
These flowers have been watered;you can go home.这些花已经被浇水了，你可以回家了。
三、现在完成时的被动语态的用法1. 用于不知道动作执行者是谁时。
His bike has been stolen. 他的自行车被人偷了。
（不清楚是被谁偷的）2. 用于动作执行者是泛指或不言自明时。
Not a book in the library has been taken away. 图书馆里的书没有一本被人拿走。
Unit 3 重点词汇讲解 课件 2021-2022学年人教版高中英语必修第二册
have cash on sb 某人身上带着现金
You can click here and pay in WeChat instead of in cash.
Payment can be made by cheque or in cash, which is very o sp Ken agreed to accompany me on a trip to Africa.
surf
Have you watched someone surf? No one knows how many people currently surf the Net. * go surfing
confirm
confirm that/wh-… 证实 It has been confirmed that… 已经证实…… Can you confirm what happened?
*confirmation /ˌkɒnfəˈmeɪʃ(ə)n/ n.证实；确认书；证明书
press
She pressed her face against the window.
The professor warned the students that on no account should they use mobile phones in his class.
rude
be rude to sb rude behavior It’s rude to do sth rudely adv. rudeness n.
她把脸贴在窗子上。
press a button They are pressing us to make a quick decision.
他们正催促我们尽快作出决定。
人教版新课标高中英语必修二 Unit 3 知识点明细
人教版新课标高中英语必修二Unit 3 知识点明细Unit 3 ComputersPart 1pare … with…把…与…相比较I compared the copy with the original, but there was not much difference.compare…to…把…比作…be compared toBooks can be compared to friends.Chairman Mao once compared the yout h to the sun at eight of nine o’clock in the morning.拓展: compared with/ to ( 常在句中作状语)_____________our small flat, Bill’s house seemed like a palace.______________the two ideas, I am in favor of the former.2.calculate v计算；推测calculator n.( c)计算器calculation n. (u) 计算The scientists calculated when the spacecraft would reach the moon.be calculated for = be designed / intended forcalculate意为计算，核算，指通过较复杂的过程，如算术上加减乘除的运算，或数学上的精密的计算等。
意为计算，数，是计算中最基本的动作，指逐个数过而得出总数。
Can you count the number of the apple?3.universal adj. 普遍的；通用的；宇宙的Such problems are a universal feature of old age.Music has been called the universal language.English may become a ________language that everyone can learn and use.A. formalB. universalC. regularD. specialthe universe n. (c)宇宙space太空universally adv.全体地；一致地；共同地；普遍地It’s universally accepted that……4.explore the ocean / moon探索，探测, 勘探;explore possibilities / ways / causes / phenomenaWe must explore all the possibilities for the solution of this problem.If you want to explore the narrow alleys(胡同) of Beijing, tricycles are worth using.注意：explode expose exploration5.although, though, asalthough, 引导让步状语从句不倒装though, 引导让步状语从句可倒装可不到装as, 引导让步状语从句时，必须倒装为强调的词于句首+as+其他成分（陈述语序）Although/though he was a child, he was able to stand on his own feet.Child as/ though he was, he was able to stand on his own feet.Young as he is ,he knows a lot.Hard as he worked, he failed finally.Try as he might, he failed finally.6.simplify vt.简化simple adj 简单的simply adv 简单地The law needs to be simplified.A great life is the result of simplifying your life.7.sum n. (c)The sum of seven and twelve is nineteen.You will be fined the sum of 200 dollars.in sum总而言之In sum, theory should be combined with practice.To sum up, there are three main ways of solving the problem.概括来说，这个题主要有三种解决办法。
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即学即用 （1）—Excuse me,could you tell me the way to
the British Museum? —Sorry,I’m a stranger here. —A. A.Thanks anyway B.It doesn’t matter C.Never mind D.No problem 解析 A.不管怎样，还是要谢谢你。B.没关系。 C.不要紧；不用担心。D.没问题。句意为： ——打扰了，你能告诉我去大英博物馆的路 吗？——抱歉，我在这儿是个陌生人。——不 管怎样，还是要谢谢你。
（3）mark含义广泛，指事物留下的深刻印记，比 sign更侧重于区别性或指示性的标志。 （4）symbol指被人们选出的物体或图案，用来代 表 另一事物，作为该事物的标记或象征。 The dove is the symbol of peace. 鸽子是和平的象征。
即学即用
（1）The soldiers are hiding in the trees and
raised aised raising
即学即用 (1)我本来想事情会很容易，但是出现了许多问题。
I thought it would be easy,but a lot of problems have arisen . (2)事故由粗心大意引起。 Accidents arise from carelessness.
是我的一切。
with the help of my electronic
brain which neverwhfiocrhgentesvearnyftohrignegt是s 状语，
说an明yt主hi谓ng部分的伴随状况。在这个with短语中，
包含一个定语从句
在……的帮助下
,修饰my electronic brain。
5.What’s more,you can use the Internet to learn English.而且，你还能利用因特网学英语。 考点提炼 What is more意为“更重要的是；而 且 ”，常作 插入 语，相当于besides或 furthermore。
导练互动
重点单词 1.calculate
归纳总结 anyhow adv.无论如何；不管怎么说；胡乱地。 (1)“无论如何，不管怎样，反正；尽管如此”，在 作此意解时，anyway和anyhow一样，都用作让步状 语，一般位于句中（其前常有连词but）或句末。 （2）“况且，更何况；再说；至少”，作此意解 时，anyway和anyhow一样，都用作句子状语，用来 对前边的常出现在句首或最后的分句之首（位于 分句之首时其前常有连词and），而不可出现在句末。 （3）“粗心地；随意地”，在作此意解时，只能用 anyhow。
6.Difficulties will arise as we do the work. 7.Personally ,I prefer to go to Beijing for
my holiday. 8.Do you know that football coach who is
standing there? 9.“One World,One Dream” fully reflects the
（2）before用于这类句型时的结构还有： ①It didn’t take/was long (或一段时间) before...过了不久（一段时间）就……
②It will take/be long (或一段时间) before...要过很久（一段时间）才…… ③It won’t take/be long (或一段时间) before...不久（一段时间后）就会…… 2.As time went by,I was made smaller.随着时间 的推移，我被制造得越来越小。 考点提炼 句中的as是连词，引导时间状语从句， 意为“ 一边……一边…… ”或“随着……”。 表示“随着……”时，也可以用with,但with后只 接名词短语。
I began as a calculating machine in France in 1642. (回归课本P18) 观察思考 Mary always calculates the cost of goods before she buys them. 玛丽总是在买东西之前先估算好价钱。
Mr.Li calculated that it would take him three hours to get to Shenzhen. 李先生估计他要花三个小时才能到达深圳。 What I said yesterday was not calculated to hurt you. 昨天我说的话不是有意伤害你的。 归纳总结 calculate v.计算；打算；推测。 calculate on/upon指望；打算 It is calculated that...据估算…… be calculated to do打算做；故意做 be calculated for适合于
即学即用 （1）这些广告旨在吸引年轻的单身消费者。
The advertisements are calculated to attract young single consumers. （2）据估算，去年至少丧失了47 000个工作。 It has been calculated that at least 47,000 jobs were lost last year.
4.After all,with the help of my electronic
brain which never forgets anything,using my
intelligence is what I’m all about!不管怎
么
样，在我过目不忘的电子脑的帮助下，运用智能
就考点提炼
essence (实质) and the universal values of the Olympic spirit. 10.The invention of the television caused a revolution in our daily life.
Ⅱ.重点短语再现
1.from...on 从……时起 2.as a result 结果 3. so...that 如此……以致于 4.in a way 在某种程度上 5.with the help of 在……的帮助下 6.deal with 处理；安排；对付 7.watch over 看守；监视 8.in common 共有；共用 9. make up 弥补 10. after all 毕竟
归纳总结 arise vi.出现，发生；上升 。 (1)作“呈现；出现；发生”之意时，主语多为以下 抽象名词： argument/problem/quarrel/question/movement。 （2）arise from由……而引起，由……而产生； 从……中产生。
易混辨异 arise,arouse,rise,raise
（2）I might fail,but B I insist on doing it,I don’t mind.
A.however
B.anyhow
C.yet
D.meanwhile
3.arise
Then she prepares reliable moves to use if a new situation arises .(回归课本P23) 观察思考 A new difficulty has arisen. 一项新的困难出现了。 I arose early in the morning. 我早上起得很早。
4.signal
For example,I have learned to signal to my teammates in computer language to give me the ball when I am open and have a good shot for a goal.(回归课本P23) 观察思考 Don’t fire until I signal. 等我发出信号后再开枪。 He signalled to the waiter for the bill. 他示意服务员结账。 A red light is a signal of danger. 红灯是危险的信号标志。
Ⅲ.典型句式运用
1.I developed very slowly and it took nearly two hundred years before I was built as an analytical machine by Charles Babbage.我发 育缓慢，差不多到了两百年之后，查尔斯·巴比 奇才把我制成了一台分析机。 考点提炼 （1）“It took/was+一段时间+before 从句”是一个固定句型,意为“过了……后才……”。
归纳总结 signal vi.& vt.发信号；n.信号。 易混辨异 signal,sign,mark,symbol (1)signal常指约定俗成、用于传达某些信息的信 号，也指灯光、声音或信号标志。 （2）sign用法最广，可以指符号，也可以指情绪、性 格的直观显示，还可以指具体的用于识别或指示的标志， 如指示牌、卡片等，借喻作“征兆；迹象”讲。 The referee gave the sign to start the game. 裁判员给出开始比赛的信息。
原形
arise vi.出现； 发生；起因于 arouse vt.唤醒， 激起 rise vi.升起；起 身；增长；上升 raise vt.举起；唤 起；提高；饲养
过去式 过去分词 v.-ing
arose arisen arising
arouse d
aroused
arousing
rose risen rising
Unit 3 Computers