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Unit 4 Astronomy:the science of the stars 2  

2010-01-06 12:51:22|  分类: 高一英语必修3 |  标签: |举报 |字号 订阅

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课件地址:

http://swfa.ekunet.cn/kj001/001_7097_77413902568_36160.swf

一.语法要点

   主语从句:在复合句中作主句的主语的从句叫主语从句。引导主语从句的词有连词that, whether;连接代词who, what, which;连接副词when, where, how, why等。

   Eg: Which team will win the match is still unknown.

   主语从句放在句首,句子常显得笨重,因此一般把它放到句子后面,前面用引导词”it”来作主语。

   Eg: It’s strange that he didn’t come yesterday.

http://video.baidu.com/t?di=1118725511_1118725507&pos=4&word=science%20of%20the%20stars

 

二.重点难点

  1.Nobody knew that it was going to be different from other planets going to be different from other planets going round the sun.

     going round the sun 为现在分词短语定语,表示一般的动作。

     Eg: Men breaking the law will be punished.

     现在分词短语,也可表示进行的动作

  2. Weather life will continue on the earth for millions of years to come will depend on whether this problem can be solved.

     for millions of years to come 中不定式to come 作定语,与前面的名词有逻辑上的主谓关系。

     Eg: She is the last person to tell lies.

  3.The problem was that the earth became violent because it was not clear whether the solid shape was to last or not.

     The problem was that …, that 引导表语从句,that 只起连接作用,无意义,但不能省略。

     Eg: The trouble is that we are short of money.

  4.As the earth cooled down, water began to appear on its surface.

     as  conj. 随着,在…期间;由于,因为;尽管,即使;当…的时候;像…一样

  5. That made it possible for life to begin to develop.

     it 是形式主语,真正的主语是不定式to begin to develop.

     Eg: He thinks it’s his duty to help others.

  三.功能句型

指示(Introductions)

Please look at/ listen to …        Please pay attention to ...

Please check that …        Make sure you …

Don’t forget to …        Watch out for …

You need …        You’d better …

You must/mustn’t …  

四. 重点单词及短语

   单词

  ① atmosphere  n. 大气,空气,气氛

      a friendly atmosphere  友好的气氛

     atmospheric  adj. 大气的,有气氛的

   ② violent  adj. 剧烈的,厉害的;(人)暴戾的;(感情、言语)激昂的,激烈的

violence n. 剧烈,暴行

 violently adv. 激烈地,粗暴地

③ solid adj. n. 固体的;实质的;纯粹的;结实宾;牢靠的,稳固的

④ explode vt. vi. 爆炸,使爆炸;感情爆发;驳倒,推翻

   explosion  n. 爆发,爆炸

   explosive  adj. 爆炸性的,爆发性的

⑤ surface  n. 外表,表面;adj. 表面的,外表的;vt. vi. 浮出水面,给…装上表面

⑥ dissolve  vt. vi. 使溶解,溶解;解散,消除,解除

   dissolution  n. 解散,溶解

⑦ harmful  adj. 有害的

   harm  n. v. 危害,伤害

   harmless  adj. 无害的

   harmlessness  n. 无害,无恶意,天真无邪

   harmfully  adv. 有害地

   harmlessly  adv. 无害地

⑧ spread  vt. vi. n. (使)张开,伸展,扩张;涂;散布,传播;(使)蔓延

⑨ exist  vi. 在,存在,生存

   existence  n. 存在;生活,生存

⑩ mass  n. 团,块,堆,众多,大量;pl. 群众,民众;质量

  短语

in time  迟早,最后           in time for sth./to do sth.  及时,不迟

prevent … from  阻止某人做某事(from 有时可省略,但在被动说现语态中不能省)

depend on/up sth.  依靠,指望;相信;取决于

cheer up  使某人高兴或更快乐

now that  既然,由于

break out  突然发生,逃出某地

make sense of … 理解,弄懂,有道理,有意义,理智的

The second period  Language study

 Step Ⅰ Revision

1.    Check retelling of the passage

2.    Translate the following sentences.

a.    你迟早会成功的.

b.    我的车与你的不一样.

c.    站在门旁边的那个人是谁?

d.    他总是第一个来,最后一个走.

e.    既然你已经长大了,你自己决定吧.

 Suggested answers:

a.    You will succeed in time.

b.    My car is different from yours.

c.    Who is the person standing by the door?

d.    He is always the first to come and the last to go.

e.    Now that you have grown up you can decide it yourself.

 Step Ⅱ Word study

  This part is a consolidation of the words learnt in this unit. Ask the students to do the exercises individually.

a.    Page 27. First let students finish part 1,2

b.    Check the answers with the whole class.

c.    Give students 3minutes to finish part 3.

d.    Let the students read part 4 for a while and finish it.

e.    Turn to page 63. First let the students finish 1and 2 and check the  answers.

 Step Ⅲ Preparation

 Show some sentences on the blackboard.

a.    A tree has fallen across the road.

b.    You are a student.

c.    To find your way can be a problem.

d.    Smoking is bad for you.

e.    “How do you do?” is a greeting.

f.    What she said is not yet known.

g.    That we shall be late is certain.

h.    It’s certain that we shall be late .

 T: What part does the underlined part serve as in each sentence? Or find its subject in each sentence.

 Step Ⅳ Grammar

1.    Give the students some time to find the sentences in the passage. The collect answers from the class.

2.    Show typical examples of how to make a subject clause. Guide the Ss to find out what changes we have to make when we make a sentence or combine two sentences using subject clause. Teacher shows the example and Ss write down the sentences.

3.    Turn to page 64. Read the following passage quickly and finish the eight sentences.

4.    Have a discussion in pairs. The topic is My dream. One talks about the problems in his study or life, another gives some advice. Remind the students to use the following structures

a.    My problem is…

b.    My trouble is…

c.    The question is…

d.    My advice is…

e.    What I think about it is…

f.    The fact is…

g.    My suggestion is…

 Step ⅤHomework

1.    Finish part 3(P23)

2.    Finish part 3(P64)

 

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