2017-2018学年高中英语人教版必修三教学案：Unit 4 Section 2 Word版含答案正式版

Ⅰ.单词拼写

1．This theory (理论) is helpful to explain how the universe began. 2．Across the globe (地球), sea level varies by hundreds of feet. 3．The little boy is interested in astronomy (天文学)．

4．He often says that he doesn't believe in any religion (宗教) and only believes in himself. 5．Unlike (不像) his brother, he is talkative and has a sense of humour. 6．If you multiply (乘) two and three, you will get six.

7．The big project has cost almost as much as one billion (十亿) dollars. 8．Oxygen (氧气) is a kind of gas that is necessary for animals and plants to live. Ⅱ.拓展词汇

1．violence n．暴力→violentadj.猛烈的，激烈的→violently adv.猛烈地，激烈地 2．harm n．伤害，损害→harmfuladj.有害的 3._existvi.存在，生存→existence n．存在

4．puzzlevt.使迷惑→puzzled adj.迷惑的→puzzling adj.令人迷惑的 5．religionn．宗教，宗教信仰→religious adj.宗教的，宗教信仰的 [巧记单词]

派生词 Ⅲ.补全短语

1．in time 及时；终于 2．be fundamental to对……(来说)是基本的 3．lay eggs 下蛋 4．give birth to产生；分娩

5．in one's turn 轮到某人；接着 6．prevent ... from ... 阻止；制止

violently harmful existence →violent＋-ly →harm＋-ful →exist＋-ence

1．[教材原句] The earth became so violent that it was not clear whether the shape would last or not.

地球变得激烈动荡，不知道这个固体形状是否会继续存在下去。 [句型点拨]so ... that ...“如此……以至于……”。

[佳句赏析](2015·北京满分作文)The dough figurine he made was so beautiful that we couldn't wait to have a try ourselves.

他做的面人是如此漂亮，以至于我们迫不及待地想亲自试一试。

2．[教材原句]This produced a chain reaction, which made it possible for life to develop. 这就产生了一个连锁反应，使生命的发展成为可能。 [句型点拨]make it＋adj.＋to do。

[佳句赏析]The girl knows three foreign languages, which makes it easier for her to find a good job.

这个女孩懂三门外语，这使她更容易找到一份好工作。

3．[教材原句] What many scientists believe is that the continued presence of water allowed the earth to dissolve harmful gases and acids into the oceans and seas.

很多科学家相信，由于地球上长期有水存在，使地球得以把有害气体和酸性物质溶解在海洋里。

[句型点拨]what主语从句＋is that表语从句。

[佳句赏析](2014·四川高考满分作文)In addition, what may interest you most is that I am really nervous and upset when taking the exam.

另外，可能最使你感兴趣的是，考试时我真的紧张、烦躁。

4．[教材原句] It was not immediately obvious that water was to be fundamental to the development of life.

水对于生命发展起关键作用，这一点在当时并不明显。 [句型点拨]It is obvious that ...“很明显”。

[佳句赏析]It is obvious that a good learning habit can help us to speed up to reach our destinations.

显而易见，一个好的学习习惯能帮助我们尽快达到我们的目标。

1．They were in time to produce carbon dioxide, nitrogen，water vapour and other gases, which were to make the earth's atmosphere. (P25)

它们最终产生了二氧化碳、氮气、水蒸气和其他气体，从而形成了地球的大气层。 ★in time及时；终于；总有一天 写出下列句中in time的含义

①Andy knew he could not reach the house in time.及时

②You'll succeed in time because you are always working hard.总有一天 ③Working hard made him successful in time.终于 in no time立刻；马上

at no time 决不(放在句首时，句子用部分倒装) at a time 每次；一次 at one time 曾经；一度 at the same time 同时 from time to time 有时；偶尔

④At_one_time I grew crazy about skating. However, I fell onto the ground from_time_to_time,_but I knew that I would at_no_time be skilled if I lack of practice. 曾经我对滑冰十分痴迷。然而我却有时摔在冰面上，但是我知道如果缺乏训练我绝对不会熟练。

2．What many scientists believe is that the continued presence of water allowed the earth to dissolve harmful gases and acids into the oceans and seas. (P26)

很多科学家相信，由于地球上长期有水存在，使地球得以把有害气体和酸性物质溶解在海洋里。

★harmful adj.有害的 (1)be harmful to ...对……有害

(2)harm n. & vt. 伤害；损害 do harm to sb.＝ do sb. harm 伤害某人；对人有害 There is no harm in doing sth. 做某事没有坏处 (3)harmless adj. 无害的；无辜的 ①It is harmful to your eyes to read books in the bus. 在公共汽车上看书对你的眼睛有害。

②Playing computer games will not only do great harm (harm) to your physical health, but it is also harmful (harm) to your mental health. So there is no harm in_advising (advise) you to give it up.

玩电脑游戏不仅对你的身体健康有害，而且对你的心理健康也有害，因此建议你放弃玩电脑游戏是没有害处的。

③They killed the harmless (harmful) old man in cold blood.

他们残忍地杀害了那位无辜的老人。

3. This produced a chain reaction, which made it possible for life to develop. (P26) 这就产生了一个连锁反应，使生命的发展成为可能。

★这是“make it＋形容词/名词＋to do sth.”句型。该句型中it为形式宾语，指代后面的不定式结构，形容词或名词为宾语补足语；除指代不定式结构外，还可指代that引导的宾语从句。

精通这项技术可能会让我们更加有效地利用网络。(一句多译)

①Mastering the technology makes_it_possible_for_us_to use the Internet more effectively. ②Mastering the technology makes_it_possible_that we can use the Internet more effectively. 4. They laid eggs too and existed on the earth for more than 140 million years. (P26) 它们也生蛋，在地球上存在了一亿四千多万年。 ★exist vi.存在；生存

(1)exist in 存在于……之中 exist on 靠……为生

There exists/existed ... 某地有……；存在…… (2)existence n. 存在；生存 in existence 存在

come into existence 产生；成立；开始存在 ①They can't exist on the money he's earning. 他们靠他挣的那点钱无法维持生活。

②There exists a good way to solve the existing problem at present.(exist) 目前有一个解决现存问题的好办法。

③No one knows when such a custom first came into existence (exist)． 没有人知道这种风俗是什么时候开始有的。

[点津]exist是不及物动词，没有被动语态，也不用于进行时态。

5．Thus they have, in their turn, become the most important animals on the planet. (P26) 于是，它们接着成了这个行星上最重要的动物。 ★in one's turn轮到某人；接着 in turn依次；轮流；反之；相应地 by turns 轮流；交替地 take turns to do sth. 轮流做某事 It is one's turn to do sth. 轮到某人做某事 It turns/turned out that ... 结果……

①When it is in my turn, I am too excited to speak.