Unit3
◆ 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! order sb to do sth 命令某人做某事
（1）韩梅梅命令李雷去做家务。_________________________________________ (2) My mother order me _______ off the TV. A. to turn B. turning C. turn D. to turning
2 Learn how to compare things by using the comparative 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。Compare…with… 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：
I‘ll 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
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。
(1) 我将来想从事一名教师。________________________________________ (2) 我妈妈是一名家庭主妇。________________________________________
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
(1) 我没想到你是这样一个人。_________________________________ 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。如：
Children depend on their parents.孩子依靠父母。
(1)我们必须自己靠自己。____________________________________
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
(1)我以每分钟500米的速度冲向饭堂。_________________________________ 8 In addition, computers can do important jobs like operating 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。
(1). 另外，我寒假还要去旅游。________________________________________ 9. However, one day computers may be able to do a better job than human beings. Be able to 意为―能，能够‖，后接动词原形。 Tom isn‘t able to come because he is ill. 辨析be able to与can be able to 表示有能力，往往是有人称和数的变化 经过努力而获得的能可用于多种时态 力 can 表示身体或精神上自没有人称和数的变化 身具备的能力，还可以表示请求、允许、推测 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.
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。
（1） 你需要按时完成作业。___________________________________________ （2） 没有人的时候灯要关掉。__________________________________________ 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.
(1) 我们去下川岛玩得很开心。___________________________________ =___________________________________________ As well意为―也‖。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‖ I‘m much taller than you.
只有一般现在时和一般过去时的两种时态 常见的用于修饰比较级的单词或短语有much, even, a 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―What‘s 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 computer 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 Lucy‘s mother ________ a teacher in a big school. She is kind to all her
students.
A. works out B. works as C. 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 kilometres 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 Use your b ________ , and you‘ll 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. 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, you‘ll 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 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 aren‘t cleverer than us because we can ________.
A. calculate faster than them B. always give right answers produce new ideas
Step three-Speaking ＆ Writing
C.