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1、Unit3 Computers 知识探究Step one Getting ready & Reading课文讲解1 Listen to a woman making a phone order.听一位女士电话购物。Order n.订货；订购。 make an order 订购。如：Please make an order for a new sofa and a tea table.请订购一个新沙发和茶几。回顾：order 还可表示“命令”的意思。如：This is an order! 这是命令!2 Learn how to compare things by using the compar
2、ative of adjectives.学习如何用形容词的比较级来对比事物。 Compare v.比较；对比。Comparewith 把与相比。如： Compare this picture with that one and see which is better. 把这幅画和那幅画相比，看看哪幅更好。3 We use the computer for typing. 我们用电脑来打字。Type v.打字。如：Ill ask Miss white to type the letter. 我会让怀特小姐把这封信打出来。Type 还可作名词，表示“种类；类型”的意思。如：A type of 一种
3、4 Computers may work as doctors. 电脑可以当医生。Work as 从事工作。如：My brother works as an engineer.我哥哥是工程师。5 You may be unaware of them. 你可能没意识到这些。 Be unaware of 没意识到；未察觉。如：He was unaware of the truth. 他没意识到真想。拓展：be aware of 意识到；察觉到6 You depend on computers more than you realize. 你依赖电脑的程度比你知道的更多。 Depend on 依靠。
4、如： Children depend on their parents.孩子依靠父母。7 They can calculate at a faster speed than we can and almost never give wrong answers. 它们的计算得比我们快，而且几乎从不出错。Speed n. 速度。如： At a fast / full speed 快速 / 全速 At a speed of 120 kilometers per hour 以每小时120公里的速度8 In addition, computers can do important jobs like o
5、perating railways and flying planes and spaceships.此外，电脑可以做很重要的工作，如铁路系统的控制、飞机飞船的操作。 In addition 除以外（还）。如： He does well in all his subjects.In addition,he is good at playing sports. 他各门功课都很出色。此外，他还擅长各项运动。9. However, one day computers may be able to do a better job than human beings.Be able to 意为“能，能够
6、”，后接动词原形。Tom isnt able to come because he is ill.辨析be able to与canbe able to表示有能力，往往是经过努力而获得的能力有人称和数的变化可用于多种时态can表示身体或精神上自身具备的能力，还可以表示请求、允许、推测没有人称和数的变化只有一般现在时和一般过去时的两种时态10. Some young people always need help from their parents. Need作实义动词讲，意为需要Need to do sth “需要做某事”，主语通常是人We need to tell him the truth
7、.Need doing sth “需要做某事”，主语通常是物The flowers need watering.Need作情态动词时，没有人称和数的变化，后接动词原形，主要用于否定句或疑问句中。11. We had fun and learnt something new as well.Have fun意为“玩得开心，过得愉快”，相当于have a good/great/wonderful time或enjoy oneself,此处fun是不可数名词，意为“玩笑，娱乐，乐趣”The children are having fun playing in the park.As well意为“也
8、”。通常放句末，相当于too.I can speak Chinese and I can speak English as well.12. .but it works at a much faster speed than my old one.At介词，意为“（速度）以.”。At a speed of以.的速度 at high/low speed以高速/低速At top/full speed以全速Much faster意为“快得多”。“much+形容词/副词的比较级”意为“.得多”Im much taller than you.常见的用于修饰比较级的单词或短语有much, even, a
9、little, a bit等。Step two-Listening 讲解Price each单价Price名词，意为“价钱价格”。询问价格用“Whats the price of.?”，相当于“How much is/are.?”。1） 表示价格高用“high”,表示价格低用“low”。The price of the book is very high.2） expensive “昂贵的，花钱多的”，表示物品“贵”；表示物品“贱”用cheap（廉价的，便宜的）。它们的主语必须是货物、物品本身。This watch is expensive.【随堂练】：(一) 单项选择：1 This comp
10、uter is _ than that one. A. expensive B. more expensive C. much expensive D.most expensive( ) 2 Mary depended _ her grandparents after her parents died in the accident A. on B. in C. by D. with( ) 3 Lucys mother _ a teacher in a big school. She is kind to all her students. A. works out B. works as C
11、. works in D. works on( ) 4 Sam is an excellent engineer. _ ,he is a good footballer. A. in trouble B. in time C. in addition D. in future( ) 5 We use the mouse for _ the computer. A. control B. controls C. controlled D. controlling(二) 单词拼写。1 How fast can the car run?It can run at a s _ of 150 kilom
12、etres an hour.2 We d _ on each other because we are good friends.3 These ants are so t _ that people are always unaware of them.4 Usr your b _ , and youll find a way.5 My seventy-year-old grandpa is learning to t _ with the computer.(三) 完成句子。1 人们生病时要依靠医生。 People have to _ _ doctors when they are ill
13、.2 此外，李老师还是个灌篮高手。_ _, Mr Li is a great basketball player.3 你父亲从事什么工作？ What does your father _ _?4 我没察觉到这个错误的答案。I _ _ _ the wrong answer.5 如果你比较一下这些文章，你就会知道谁写得最好。 _ you _ these articles,youll know writes the best.(四) 读课文，选择正确答案。( ) 1 The first computers appeared _. A. in 1940 B. before cars C. in the
14、 1940s( ) 2 Now computers are becoming _. A. smaller B.less C.bigger( ) 3 Computers can do _ for human beings. A. nothing B. something C. anything( ) 4 People move the _ to control the computer. A. mouse B. keyboard C. monitor( ) 5 Computers arent cleverer than us because we can _. A. calculate faster than them B.always give right answers C. produce new ideasStep three-Speaking Writing1 What do you think of computers? What do you think o
