必修2Unit 3 Computers学案 (1)

Unit 3Computers学案(1)
1. In pairs discuss what they have in common.小组讨论：它们有什么共同之处。

have … in common
have sth. in common with 与……有共同之处
have a lot/ much in common 有许多共同之处
have nothing in common (with) 与……没有共同之处
have little in common with… 与……几乎无共同之处
The two countries have 这两个国家有一些共同之处。

They have . 他们有许多共同之处。

I have in common with him. 我与他毫无共同之处。

He has in common with me. 他和我没什么共同之处。

common adj.普通的，常见的，时时发生的，人所共有的指因许多事物或人共同具有而常见。

usual adj.通常的，惯常的，惯例的，指从时间上和频率上讲通常发生的事情或一种习惯。

ordinary adj. 平常的，平凡的，普通的，侧重表示“无奇特之处”
general adj.一般性的，一般的，表示在大多数人或物中流行并受到关注，还有“总体的，概括的”之意。

选择适当的词填空：
1）It is_ _______with him to go to the office on foot.他习惯步行去办公室。

2）Colds are ______ in winter.冬天感冒是很常见的。

3）He is in _______clothes.他穿着平常的衣服。

4）He has a good _______ education.他受到良好的全面教育。

5）She is an _______teacher.她是一名普通教师。

2. What do you think will be the next development?你认为下一步发明是什么？
do you think 为插入语，插在特殊疑问句的中间，前后不必用逗号分开。

除think 外，作插入语的动词还有believe/ imagine/suppose/consider/suggest等。

do you think 这种插入语和特殊疑问句连用时要注意：
1疑问词在句中作主语时，将插入语do you think 放在疑问词后谓语动词前，其他不变，如将插入语撤走原句式不变。

e.g: ate the cakes? 你认为是谁吃了蛋糕？（Who 作主语）
2疑问词放句中不是作主语时，将插入语放在疑问词后，其他成分要成为think 的宾语从句，既要用陈述句语序。

e.g: Why do you think ? 你认为她为什么又迟到了？（Why作状语）
【拓展】常见的插入语还有I think, I hope, I guess, I’m afraid, I believe, you know等。

这些插入语通常要用逗号分开。

e.g: This diet, , will do good to your health. 我想这种饮食对你的健康有好处。

You will have to try harder, , if you want to succeed.
你知道，如果你想要成功，就必须更加努力才行。

3. 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。

“It took/was+一段时间+before从句”是一固定句型，意为“过……后才……”。

e.g: It took long /five hours before we arrived at the village.
过了很久（五个小时）我们才到达村庄。

【拓展】before用于这类句型的结构还有：
1.It didn’t take/wasn’t long(或一段时间)before…过了不久（一段时间）就……
2.It will take/be long(或一段时间)before…要过很久（一段时间）才……
3.It won’t take/be long(或一段时间)before…不久（一段时间后）就会……
e.g: It didn’t take long(wasn’t long) before the fire was under control. 。

用合适的连词填空：(since, when, before, that, until )
1)It is five years ______he joined the army.
2)It was nearly nine in the morning _____he woke up.
3)It will be at least three more months ____he can recover and return to work.
4)It was at midnight _____the fire broke out.
5)It was not ______midnight ____he came back.
4. Over time my memory has developed so much that, like an elephant, I never forget anything I have been told!渐渐地我的记忆发展如此之大，以至于，像个大象一样，我不会忘记别人告诉我的任何事情。

注意本句主句也可以改写为：… my memory became so large that，like an elephant, I could never forget… 也就是变为“主-系-表结构”，即：memory的表语可以是large。

5 But I was always so lonely standing there by myself，until in early 1960s they gave me a family connected by a network.. I was able to share my knowledge with others through the World Wide Web. 但是我总是孤孤单单地站在那里, 直到二十世纪六十年代初，人们才给了我一个用网络联成的家庭。

我能够通过万维网和其他人分享我的知识。

lonely 孤独的，寂寞的，荒凉的, 只做形容词，可用作表语，也可用作定语
She lives but she doesn’t feel. 她虽独自生活，但并不感到孤独。

Mars is a planet.火星是一颗荒凉的行星。

alone用作形容词时，“单独的，独一无二的”，只能做表语，不用做定语修饰名词，用作副词时，表示“单独地，独自”
The boy is alone at home.那孩子一个人在家。

Home alone is a fun movie.《小鬼当家》是一部有趣的电影。

Are we human beings alone in the universe? 我们人类在宇宙中是独一无二的吗？
I went .我是一个人去的。

standing there by myself… standing是现在分词作方式状语
My cousin came to see me from the country, __ me a full basket of fresh fruits.
A. brought
B. bringing
C. to bring
D. had brought
Daddy didn’t mind what we were doing, as long as we w ere together, ___ fun.
A. had
B. have
C. to have
D. having。