外研版(2019)选择性必修二Unit 5 A delicate world Review精品课件（22张PPT）

外研版英语 选择性必修第二册
Unit 5 A delicate world
Mainly revision for this unit
本课件主要内容安排
课件内容
1. 单元构词扩展词汇
2. 单元核心词汇讲解
3. 单元专题语法讲解
4. 单元重点句型讲解
单元构词扩展词汇
1. dramatic adj. ? adv._____________
7. secure adj. ?n. ______________
2. conserve v. ? n. _______________
8. biology n. ? adj. ______________
3. immunity n. ? adj. _____________
9. ecology n. ? adj. _____________
4. compare v. ? n. _______________
10. explode v.? n. ______________
5. mysterious adj. ? n. _____________
11. variation n. ? v. _____________
6. criterion n. ? (pl.)______________
12. endanger v. ? adj. _____________
dramatically
conservation
immune
comparision
mystery
criteria
security
biological
ecological
explosion
vary
endangered
单元重点短语
1. on behalf of
8. in return
2. owe... to...
9. add...to...
3. remove...from...
10. strench on and on
4. in consequence
11. be renowned for
5. turn out
12. coexist with
6. break down
13. prey on
7. take in
14. be native to...
?词汇一 appetite n. 食欲，胃口，爱好，欲望
◆教材原句 Unfortunately, the cats subsquently developed an appetite for the birds,too. 不幸的是，猫科动物后来也对鸟类产生了食欲。
◆要点必记
develop/ create/arouse an appetite for 对…产生欲望;
to sb's appetite 合某人的胃口;
improve/ promote the appetite 增进食欲;
lack appetite 缺乏食欲
satisfy one's appetite 满足食欲
跟踪训练
1. Their appetite __________ new products also contributes to excessive buying but it is not necessary for them.
2. He has such a big appetite _________ reading that you never see him without a book.
3. 她有强烈的求知欲。（翻译）
___________________________________
4. Exercises will increase your appetite for food. （翻译）
________________________
5. He has ______ strong appetite for learning on his own and reading.
She has a great appetite for knowledge.
锻炼身体会增进食欲。
for
for
a
?词汇二 multiply v. (使)成倍增加
◆教材原句 They multiplied rapidly and began eating the native vegetation and digging holes, which caused soil erosion. 他们迅速繁殖，开始吃当地的植被和挖洞，造成了水土流失。
◆要点必记
multiply vi. （快速）繁殖
multiply...by... ...乘以...
multiplies the risk of... 大大增加......风险
◆考点呈现
1. Three ___________ (multiply) by four makes twelve.
2. Two multiplied by four ____________ (equal) eight.
3. It is possible to multiply these bacteria in the laboratory. (翻译)
————————————————————
multiplied
equals
在实验室里繁殖这些细菌是可能的。
?词汇三 owe v.欠（帐） 应该做；负有义务
◆教材原句 but we humans owe it to the island to give it a happy ending. 但我们人类有愧于这个岛屿，应该给它一个幸福的结局。
◆要点必记
owe sth to sb = owe sb sth 欠某人某物； 归因（功）于...
owe it to sb that-clause 把...归于...
owe it to sb to do sth 把...归于...
owe sb a favour 欠某人一个人情
owing to... 由于，因为
跟踪训练
1. My headteacher gives us much love and care, _________ whom we owe many thanks.
2. I owe it to him ____________ I have succeeded in passing the test.
3. I think that you should owe it to yourself ___________ (get) some professional help with job-hunting.
4. How much do I owe you _________ the groceries?
5. The island's present economy owes a good deal ________ tourism.
6. He owed his survival to his strength ___________ a swimmer.
to
that
to get
for
to
as
?词汇四 immunity n. 免疫力
◆教材原句 It turned out that they developed an immunity to the virus, and their numbers exploded once again. 结果发现，它们对病毒产生了免疫力，它们的数量再次暴增。
◆要点必记
immune adj. 有免疫力的；不受影响的；
be immune to sth 对...有免疫力；不受...影响；
be immmune from 免除；受保护；
artificial immunity 人工免疫
an immunity to sth 对...的免疫力
跟踪训练
1. He was so stubborn that he was immune _______all suggestions.
2. The rule says that nobody will be given immunity _______ taxation.
3. Children who have gotten the chickenpox build an immunity _____ it so that they do not get it a second time.
4. Birds in outside cages develop an _________ (immune) to airborne bacteria.
5. Challenges are regular visitors in our life, and nobody is immune to them.(翻译)
__________________________________________

immunity
to
from
to
我们常常会遇到挑战，没有人会不受到它的影响。
?词汇五 explode v. 突然增加
◆教材原句 It turned out that they developed an immunity to the virus, and their numbers exploded once again. 结果发现，它们对病毒产生了免疫力，它们的数量再次暴增。
◆要点必记
explosion n. 爆炸；爆发；激增
a bomb/nuclear/gas explosion 炸弹╱核╱气体爆炸;
an explosion of interest in learning Chinese 学习汉语的兴趣陡然上升；
explode into/ with (anger) 勃然(大怒); 大发(雷霆); 突然发生(危险);
explode into laughter 哄然大笑
跟踪训练
1. After ten minutes the game exploded _________ life.
2. We all exploded into wild __________ (laugh) when we attended the teacher's lecture.
3. The ___________ (explode) which followed blasted out the wall of her apartment.
4. Do you fear that you'll burst into tears or explode _________ anger in front of her?
5. Such anger filled her that she felt she might explode with it. (翻译）
__________________________________
into
laughter
explosion
with
她怒火中烧，感到自己快要爆炸了。
?词汇六 session n. 一段时间，(会)期
◆教材原句 The end of a lecture is often followed by a short question-and-answer session. 讲座结束后通常会有一个简短的问答环节。
◆要点必记
in session 在开会；在开庭；在上课
a photo/ recording/ trainingsession 一次摄影，一场录音，一堂训练课等；
in closed session 秘密会议
◆考点呈现
1. The Arab League is meeting ________ emergency session today.
2. It turned out to be _______ interesting session with a lively debate.
3. I think we've learned a lot about one another in this session.(翻译)
____________________________________________
我认为这段时间我们相互有了很多了解。
in
an
语法 it用作形式宾语
一. 概述：
it 常常可代替不定式，动名词短语或者从句，而将真正的宾语放在句子后面，以平衡句子结构。
二. 用法：it 作形式宾语，主要分为下列几种情况:
1. 动词+it+adj/n.+ (for/of sb)+ to do sth；
2. 动词+it+ no good/no use/ useless/ a waste of time ...+ doing sth;
3. 动词+ it + 介词（to/for sb）that-从句；（eg. take it for granted that-clause）;
4. 动词 + it + when (if)-从句（常见的有 enjoy, hate, love, like, dislike, appreciate, prefer）。
跟踪训练
1. We really appreciate ___________ when she offered to help at your earlier convenience.
2. We think it no use _______________ (complain) if you do nothing.
3. You can put it _________it was arranged before.
4. I don’t feel it difficult _______________ (understand) the Special English.
5. They found_______ pleasant that they worked with us Chinese.
6. I leave it to your own judgement __________ you should do it.
7. He makes it a rule never _____________ (borrow) money.
complaining
it
that
to understand
it
whether
to borrow
单元重点句型 1
1. Nor would they fail to imagine how its native inhabitants, including royal penguins, and elephant seals,existed in perfect harmony with their natural habitat. 他们也不会忘记这里的土著居民，包括皇家企鹅和海象，是如何与他们的自然栖息地和谐共存的。
【句型分析】
否定副词nor 位于句首，句子须用部分倒装语序。
【句型拓展】
a. 当含有否定意义的词或者短语在原句中作状语时，句子须用部分倒装语序 。 部分倒装语序常常采用一般疑问句序，即：否定词+be/助动词/情态动词+ 主语+ 谓语....
b. 这样的否定词有： never/ neither/ seldom/ hardly/ rarely/ scarcely/ by no means/ in no way/ at no time等。
跟踪训练
1. I will never know what was in his mind at the moment, _______________ will anyone else.
2. Seldom __________ it occur to them to wander a bit, to take a moment to see what was around them,
3. Nor _______ I know what drives me to behave as I do usually, for I just sit there in silence.
4. I've tried hard to improve my English. But by no means _______ the teacher not satisfied with my progress.
5. Only then ________ she realize how much damage had been caused.
neither/ nor
did
do
is
did
单元重点句型2
2. Recent years have seen more and more pet sliders escaping or being released from homes, and some owners believe to release them into the wild is no big issue.近年来，越来越多的宠物溜出家门或被放生，一些主人认为把它们放生到野外不是什么大问题。
【句型分析】
本句中， see意为“见证，目睹，经历”， 主语为recent years, 最近这些年见证了....
【句型拓展】
see意为“见证，目睹，经历”时， 常常用时间或者地点的名词作主语，表示某时间或地点“见证，目睹，经历”了某事。 类似的词还有： find/ witness/say/ experience等， 这些词以物作主语，表示一种拟人的手法，使得语言更生动。
理解应用
1. The last 30 years _____________ (see) the great number of laws stopping our rights and progress in USA.
2. The tea house torn down last year _____________ (witness) a really enjoyable time for those old men.
3. The clock said four minutes past eleven when we set off. (英译汉)
4. Our country has experienced great changes in the last 20 years. (英译汉)
5. The study found that knowing another happy person increases your own happiness.
我们出发时，时钟显示11点4分。
have seen
witnessed
在过去的20年里,我们国家经历了巨大变化。
研究表明，接触一个快乐的人可以把自身的快乐程度提高
单元重点句型
3. Is it the legendary father of Chinese herbal medicine, Shennongjia, after whom the park is named? 传说中的中草药之父神农架，公园就是以他的名字命名的吗?
【句型分析】
句子中 “after whom” 引导非限制性定语从句，介词after 源于从句中固定短语name after: 以...来命名; whom 指先行词shennongjia.
【句型拓展】
介词+关系代词whom/which 引导的定语从句，which指事物，而 whom指人；介词 来自从句的逻辑搭配。注意：这种情况下，关系词不能使用that, who或者其他关系副词。
理解应用
1. I never forget the day _________ which Tom came to this company.
2. This is Tom’s notebook without ___________ he cannot check his design drawing.
3. We marched through the square, in the middle of ___________ stood a monument.
4. Tom work in a company the gate ________which opens to the north.
5. The reason _________ which I was praised by the manager was that I worked hard.
6. There came the boy, ______ whom his father had waiting for a long time.
on
which
which
of
for
for