英语人教新课标第14讲Astronomythescienceofthestars教案 |
教材版本 | 全国通用 | 课时说明〔建议〕 | 3课时 |
知识点 | 中心词汇：harmful; exist; puzzle; pull 中心短语： in time; in one’s turn; cheer up |
温习目的 | 学会灵敏运用本单元基础言语知识，重点语法知识 |
温习重点 | 重点句型： make it+描画词/名词 +to do sth |
温习难点 | 主语从句 |
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一、自我诊断 知己知彼
Ⅰ. 单句语法填空
1．Reading in bed will do harm ________ your eyes.
2．It is impossible for a cock to lay ________ (egg)．
3．If steel is heavier than water，why are ships able ________ (float)on the a?
4．In his black and blue suit and with ________ oxygen tank fastened on his back，Larry dived from boats into the middle of the ocean.
5．The climate here ________ (be)quite pleasant，the temperature rarely，if ever，reaching 30℃ in summer.
6．Our success depends ________ whether everyone works hard.
7．The destruction of such species could prevent rearchers ________ (find)cures for certain dias.
8．It was difficult for the helicopters ________ (get)clo to the roof of the building becau of the heavy smoke.
9．We have launched another man－made satellite， ________ is announced in today's newspaper.
10．Now that they have computers，it becomes ________ (easy)to deal with the problems.
【答案】 1.to 2.eggs 3.to float 4.an 5.is 6.on 7. finding 8.to get 9.which 10.easier
Ⅱ. 单句改错
1．If you put your heart into it, you'll succeed on time.
2．This is such interesting a film that I have en it twice.
3．It's no longer a question now that whether man can land on the moon.
4．Whether life will continue on the earth for millions of years to come will depend on if this problem can be solved.
5．General speaking, he is a smart boy except his carelessness.
6．The river is so polluted that every day we can e a lot of things being floating on the water.
【答案】 1.on→in 2.such→so 3.去掉whether 4.if→whether 5.General→ Generally 6.去掉being
二、温故知新 夯实基础
考纲单词精讲
1、harmful adj.有害的
教材原句
What many scientists believe is that the continued prence of water allowed the earth to dissolve harmful gas and acids into the oceans and as. (P26)
很多迷信家置信，由于地球上临时有水存在，使地球得以把有害气体和酸性物质溶解在陆地里。
归结拓展
(1)be harmful to对……有害
(2)harm n．&vt.损伤；损害
Do harm to sb. /do sb. harm 对某人有害 There is no harm in doing sth.做某事没有坏处
(3)harmless adj.有害的 harmlessness n．有害
语境助记
①The drought was harmful to the crops. 这场干旱对农作物有危害。
②Fruit juice can do harm to children's teeth. 果汁能够会损害儿童的牙齿。
③They may not be able to help but there's no harm in asking them.
他们能够帮不上忙，但求他们一下倒也无妨。
2、exist vi.存在；生活
教材原句
They laid eggs too and existed on the earth for more than 140 million years.(P26)
它们也下蛋并在地球上生活了一亿四千多万年。
归结拓展
(1)exist on靠……生活/生活 exist by靠……方式为生
exist in存在于……之中 There exist(s)．..某地有……；存在……消极的一面
(2)come into existence发生；成立；末尾存在 in existence现存的
(3)existing adj.现存的；目前的
名师点睛
语境助记
①It exists in milk in great amount. 牛奶中它(钙)的含量很大。
②They can't exist on the money he's earning. 他们靠他挣的那点钱无法维持生活。
③There exists a generation gap between the young and the old. 青年人和老年人之间存在着代沟。
④Pakistan came into existence as an independent country after the war.
巴基斯坦在战后就以一个独立国度存在了。
⑤It can be quite an eye opener to e the range of classical apples still in existence, such as Decio which was grown by the Romans. 能看到依然存在的传统的苹果种类，如曾由罗马人种植的Decio苹果，真是令人大开眼界。
⑥介词填空
a．Even though he is a little boy, strange ideas always exist in his mind.
b．The old lady became riously ill last week, and she has only existed on milk ever since.
c．The Imperial Palace in Beijing has been in existence for more than 500 years.
3、puzzle n．谜；难题 vt.& vi.(使)迷惑； (使)为难
教材原句
How life began on earth is one of the biggest puzzles that scientists found hard to solve.(P27)
地球上的生命是怎样末尾的，这是迷信家们发现难以处置的最大的谜团之一。
归结拓展
(1)be in a puzzle 感到困惑；不知如何是好 a puzzle to sb. 一件让人感到困惑的事情
puzzle about/over 冥思苦想；苦苦思索 puzzle sb. 迷惑某人；使某人困惑
puzzle sth. out 揣摩出……的答案
(2)puzzling adj. 令人迷惑的 puzzled adj. 感到迷惑的
be puzzled about 对……困惑不解
名师点睛
puzzled意为〝迷惑的；不解的〞，往往用于指人或人的表情、神色、声响等；puzzling意为〝令人迷惑的；让人不解的〞，往往指物。
语境助记
①Many people are somewhat puzzled at the negative side of the voting, although some are quite happy with it, and active in doing it.虽然有些人热衷于选举，并且积极参与，但是也有很多人对选举消极的一面有点儿困惑。
②People have long puzzled over how the Egyptians moved such huge rocks.
人们临时对埃及人如何搬动如此庞大的石头而感到困惑不解。
③He was trying to puzzle out why he had been brought to the hou.
他想弄明白自己为何被带到这所房子。
④What puzzled the doctors most was that they could not find the cau of the dia.
