外研版（2019）选择性必修 第二册Unit 5 A delicate world Using language课件(共30张PPT)

(共30张PPT)
Unit 5
Section B　Using language
Part 1　Language points
Part 2　Grammar
目录索引
Part 1　Language points
基础落实 必备知识全过关
Ⅰ.重点单词
必记写作词汇 1.　　　　　　 v.(使)溶解
识记阅读词汇 2.worm n. 　　　　　　　　　　　
串记拓展词汇 3.nutrient n.养分,营养物→　　　　　　 n. 营养
→　　　　　　 adj.有营养的;营养丰富的
dissolve
蠕虫;(昆虫的)幼虫
nutrition
nutritious
Ⅱ.重点短语
1.　　　　　　　　　　 由于
2.　　　　　　　　　　 依靠;依赖
3.　　　　　　　　　　 (机器等)出故障;破裂
4.take in 　　　　　　　　　
5.release...from... 　 　　　　　　　　
6.keep a pet 　　　　　　　　　
due to　
rely on　
break down　
吸收;领会
把……从……解脱出来　
养宠物
要点探究 能力素养全提升
基础词汇——语境记忆
nutrient n.养分,营养物
【佳句背诵】Plants draw minerals and other nutrients from the soil.[植物描写]
植物从泥土中吸收矿物质和其他养料。
高频词汇——讲练互动
1.absorb v.吸收;理解;吸引
absorbing adj. 引人入胜的,十分吸引人的
be absorbed in 全神贯注于……
【佳句背诵】Plants absorb carbon dioxide.[植物描写]
植物吸收二氧化碳。
【即学即练】用absorb的正确形式填空/单句写作
①It’s difficult 　　　　　　　　so much information at once.
②This job has 　　　　　　him for several years.
③ This is an 　　　　　　book.
④这种乳霜很容易被皮肤吸收。
The cream ___________ ___________ ___________ into the skin.
⑤专心于读书,他没注意到我进入了房间。
__________ ___________ his book,he didn’t notice me enter the room.
to absorb
absorbed
absorbing
is easily absorbed　
Absorbed in
2.rely v.依靠;依赖;指望
rely on sb.to do sth. 指望/相信某人会做某事
rely on (doing) sth.依赖/信任/指望(做)某事
rely on it that... 相信……;指望……
reliable adj.可信赖的;可靠的
【佳句背诵】He can rely on my support when he meets difficulties.[人物描写]
当他遇到困难时,他可以依靠我的支持。
【即学即练】单句语法填空/单句写作
①He can’t be relied 　　　　　　to tell the truth.
②I know I can rely on you 　　　　　　　　(sort) it out.
③Many people now would rely on 　　　　　(surf) the Internet for news.
④那些你任何时候都可以信赖的人是真正的朋友。
Those who you can _______ _______ at any time are true friends.
⑤请放心,我方会与你方密切合作。
You may ______ _____ ______ _____we will cooperate with you closely.
on
to sort
surfing
rely on
rely on it that
3.break down(机器)出故障;(计划、希望、谈判等)失败;身体垮掉;分解
break away from 脱离(政党)
break in 打断(谈话);插嘴;破门而入
break into 强行闯入;撬开(汽车等)
break out (战争、火灾等)爆发
break through 突破;穿透
break up 分散;拆散;结束;(关系等)破裂
【佳句背诵】He said his computer had broken down,so he couldn’t hand in his homework.[人物描写]
他说他的电脑出故障了,所以他无法上交作业。
【即学即练】写出下列句中break down的含义/单句写作
①The car broke down on the way to the airport.　　　　　　　　
②Your health will break down if you work too hard.　　　　　　　　
③Plastic bags are difficult to break down.　　　　　
④The peace talks broke down with no agreement reached.　　　　　
⑤塑料袋分解成了有害物质。
The plastic bags ________ ________ ________ ________ ________.
(车辆)出故障
(身体)垮掉
分解
(谈判)失败
break down into poisonous materials
⑥1939年战争爆发前不久,他们逃到了美国。
They have escaped to America shortly before________ ________ ________ ________ ________ ________.
⑦科学家认为他们在对抗癌症的战争中开始有所突破。
Scientists think they are beginning to________ ________ ________ ________ ________ ________ ________ .
the war broke
out in 1939　
break through in the
fight against cancer
4.take in包括;领会;理解;欺骗;收留;收养;吸收
take apart 拆开;拆散
take care of照料;保管
take down拿下;取下;拆卸;记下
take over继承;接收;接管
take off脱下(衣服等);起飞;大获成功
take on 承担;呈现
take up 开始从事;占用(时间或空间);拿起
【佳句背诵】Although absorbed in the lesson,he still couldn’t take it in.[人物描写]
虽然专注听讲,他依然不能理解。
【即学即练】写出下列句中take in的含义/单句写作
①The price takes in the cost of all the accommodation and food.　　　　　
②Brett’s always taking in stray animals.　　　　　
③Don’t be taken in by products promising to make you lose weight quickly.
　　　　
④I found it easy to take in what the professor had said.　　　　　
⑤It is said that black takes in more heat than white.　　　　　
包括
收留
欺骗
理解
吸收
⑥鱼通过鳃摄取氧。
Fish_______ _______ _______ through their gills.
⑦她生病期间生意由她女儿代管。
When she fell ill,her daughter _______ _______ _______ _______ from her.
take in oxygen
took over the business
重点句式——多维剖析
without引导隐性的虚拟语气
【教材原句】Without bees,humans would die out.
没有蜜蜂的话,人类会灭绝。
(1)通过句子的逻辑关系或一些词、短语等暗示出来的虚拟语气,如but for。
(2)省略if的虚拟语气:有were/had/should等词时,可以省略if,将were/had/should等移至句首。
【佳句背诵】Without war in the world,people would live a happier life.[观点看法]
如果世界上没有战争,人们会生活得更幸福。
【即学即练】单句语法填空/一句多译
①　　 (have) you studied harder last term,you could have passed the exam.
②Without water,we 　　　　　　 (die) of thirst.
如果没有你的帮助,我们或许已经死了。
→③We might have died 　　　　　　　　　　.
→④We might have died if 　　　　　　　　 　　　.
要是没有你的帮助,我就不可能完成这件事。
→⑤　　　　　　　　,I couldn’t have done it.
→⑥If it 　　　　　　　　　　　　　　,I couldn’t have done it.
Had
would die　
without your help　
you hadn’t helped us　
But for your help
hadn’t been for your help
Part 2　Grammar
语法冲关 语言规则全理清
情景导入
it作形式宾语
阅读下列例句,注意黑体部分的用法。
①I think it difficult to learn English well.
② We make it clear that speaking to the teacher in that way is not polite.
③I don’t like it when people talk with the mouth full of food.
【语法感悟】
以上句子中it用作形式宾语,其中句①是“动词+it+ adj.+动词不定式(短语)”结构,it指代　　　　　　　　　　　　;句②是“动词+it+ adj.+that从句”结构,it指代　　　　　;句③中的it用在特殊的句式中,指代　　　　　　。
动词不定式(短语)
that从句
when从句
语法精讲
一、基本用法
当不定式、动词-ing形式、从句等复杂成分用作宾语且其后跟有宾语补足语时,通常会在宾语补足语前使用形式宾语it,而将真正的宾语移至句末,其基本结构为“动词+it+宾语补足语+不定式/动词-ing形式或从句”。
1.it代替不定式短语。think/find/feel/consider/make/regard...+it+形容词/名词+不定式短语
I find it pleasant to work with him.
我发现和他一起工作很令人愉悦。
2.it代替动词-ing短语(这只限于少数句型,在多数情况下用不定式更多一些)
The professor considers it no good reading without understanding.
这位教授认为阅读而不理解没有益处。
3.it代替宾语从句
We all thought it a pity that the conference should have been cancelled.
会议取消了,我们都对此感到很遗憾。
二、几种特殊的形式宾语
通常意义的形式宾语主要见于真正宾语为不定式、动词-ing形式、从句等且其后跟有宾语补足语时的情形,即用于“动词+it+宾语补足语+真正的宾语”这样的结构,但以下几类形式宾语比较特殊,其后没有宾语补足语。
1.动词+it+that从句
I like it that you came.
你来了,我很高兴。
I take it (that) he will come on time.
我认为他会准时来的。
You can put it that it was arranged before.
你可以说这是以前安排的。
Rumor has it that the defense minister will soon resign.
据传闻,国防部长不久就要辞职。
【温馨提示】能用于此结构的动词常见的有:have,take,put,like等。
2.动词+it+when/if从句
I dislike it when you whistle.
我不爱听你吹口哨。
We really appreciate it when she offered to help.
她来帮忙了,我们十分感激。
I’d prefer it if I didn’t have to do so much work.
要是我不必做那么多工作,那就太好了。
【温馨提示】能用于此结构的动词常见的有:enjoy,hate,love,like,dislike,appreciate,prefer 等。
3.动词+介词+it+that从句
See to it that you’re not late again.
注意千万不要再迟到。
Look to it that this doesn’t happen again.
注意不要再发生这种事。
I can’t answer for it that he will come.
我不能保证他会来。
You may rely on it that he’ll come to meet you.
你放心,他会来见你的。
【温馨提示】能用于此结构的动词短语常见的有:see to,look to,insist on,stick to,depend on,answer for 等。
4.动词+it+介词短语+that从句
I owe it to you that I am still alive.
多亏有你我才仍然活着。
I took it for granted that he would help us.
我理所当然地认为他会帮助我们。
【温馨提示】能用于此结构的动词短语常见的有:take it for granted,bring it to sb.’s attention,owe it to sb.等。
【即学即练】单句语法填空/翻译句子
1.　　　　　　 is reported that he got seven gold medals.
2.I find 　　　　　　difficult to do the job well.
3.I think 　　　　　　　 best that you should stay here.
4.We think 　　　　　　　　　 no use complaining.
It
it
it
it
5.他们感觉到在这么短的时间内完成这项工作是困难的。
6.她觉得帮助我们是她的责任。
7.我认为被邀请在这发言是我的荣幸。
8.他发现和他辩论没有用。
9.我将负责使一切都及时准备好。
They felt it difficult to finish the work in such a short time.
She thinks it her duty to help us.
I think it my honour to be invited to speak here.
He found it useless/no use arguing with him.
I’ll see to it that everything is ready in time.
本 课 结 束