2020-2021学年Lesson 45 Let's Sort Garbage!背景图课件ppt

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1. Be able t use the wrds: srt, empty, metal, plastic, recycle, amunt, litter, d with, t much, give sth. t sb. , be made int, a piece f, g fr a walk, take ut2. Learn t srt the garbage 3. Learn and master the usage f “it” 4. Learn sme key sentences:· What d yu d with yur garbage？· Danny empties tw bags f garbage nt the flr.
Learning Targets
· After they srt the garbage, Danny and Jenny are surprised.· Peple thrw t much away.· One f the wheels is brken.· It's dangerus t leave brken glass n the grund.· Once, I cut my ft n a piece f brken glass.
Green envirnment
defrestatin
The damaged envirnment
desertificatin
srt the garbage
packagingand thers
Think and answer
Are yu green?
D yu try t walk r ride a bike t schl? D yu buy new clthes just because they are the latest fashins? D yu pen a windw instead f turning n air-cnditining?
What shuld we d t prtect the envirnment?
Discussin
1. Turn lights ff.2. Cllect cans and paper, and sell them fr recycling.3. Try ur best t save energy.4. Ride a bike t schl.5. Use bth sides f the paper.6. Dn't thrw litter away everywhere.
srtemptymetalplasticrecycleamunt
v. 分类；整理n. 类；种类；类型v. 把……弄空adj. 空的n. 金属n. & adj. 塑料(的)v. 回收再用；再循环n. 量；数量
Wrds and expressins
litterd witht much give sth. t sb. be made inta piece fg fr a walk take ut
n. 垃圾v. 使乱七八糟；乱扔处理太多给某人某物被制作成……一张/一片/一块……去散步拿出；取出
What d yu d with yur garbage?What kinds f things can be recycled and reused?
THINK ABOUT IT
Presentatin
Danny empties tw bags f garbage nt the flr.Jenny: That's a lt f garbage！Can I help yu srt it?Danny: Yes, please. Let's put the glass here, the metal here, the plastic here and the paper here.(After they srt the garbage, Danny and Jenny are surprised. Almst all f it can be reused r recycled！They need t thrw away nly ne small bag f
Listen and read the passage.
garbage！)Jenny: Peple thrw t much away. They shuldn't waste s much!Danny: That's right. Lk！There is mre paper than plastic. And there is less metal than plastic. There is the least amunt f glass.Jenny: And the mst amunt is paper. It is a waste t use paper nly n ne side.
Danny: Hey！I fund a ty car. One f the wheels is brken. I'll take this car hme and clean it. Then I'll use sme glue t fix the brken wheel. When I finish fixing this car, I will give it t my little cusin, Debbie.Jenny: Nbdy shuld thrw away a ty like this. It can be fixed. It's nt right t waste things. Lk at all f the glass. It can all be recycled and made int new glass.
Danny: A lt f glass is brken. It's dangerus t leave brken glass n the grund. Once, I cut my ft n a piece f brken glass.Jenny：Litter can hurt peple!
1. There is a lt f garbage: glass, metal, plastic and paper. ( )2. There is the mst amunt f glass and the least amunt f paper. ( )3. Danny fund Debbie’s ty car in the garbage. ( )4. Danny nce cut his ft n a piece f brken glass. ( )
Read the lessn and write true (T) r false (F).
Let’s D It!
Circle the wrds that “it” refers t in each sentence.
Example:It is a waste t use paper nly n ne side.
It is fun t travel.It is nt right t waste things.It is quite easy t find infrmatin with this prgram.They think it is rude t pint with a finger.It is dangerus t leave brken glass n the grund.
As we all knw, “It” can be used t refer t time, weather, distance r smething mentined befre. Study the sentences abve. Can yu find ther ways f using “it” ?
Learn t learn
G fr a walk arund yur neighburhd. Take a bag with yu and pick up any garbage yu see. Wear glves because garbage is dirty.
SORT THE GARBAGE
Bring the garbage t schl. Dn't thrw it away!What kind f garbage did yu find？Srt the garbage. Make a pile fr paper, plastic，metal, glass and ther things.
·Hw much f each type f garbage d yu have？·What type d yu have the least/mst amunt f？D yu want t thrw away the garbage nw？Dn't! What else culd yu d with it？Think！Culd yu use sme f the garbage again？Hw?Hw culd peple make less garbage？Talk abut this and write dwn yur ideas.Nw yu can take ut the garbage!
Language pints
1.What d yu d with yur garbage？d with 处理。它常与特殊疑问词what搭配使用。例：What shuld I d with this prblem？ 我应该如何处理这个问题？
2. Danny empties tw bags f garbage nt the flr.empty v. 倒空 adj. 空的例：The streets began t empty after midnight. 午夜过后街上行人开始稀少了。 Vargas emptied his tl bag. 瓦格斯腾出自己的工具袋。
3.After they srt the garbage, Danny and Jenny are surprised. srt v．分类；整理。常用短语：srt ut 把……整理好，分类。例：I must srt ut my clthes fr the party. 我必须把聚会上要穿的衣服整理好。
例：The flwers shuld be watered every day.花儿应该每天浇水。 Cars mustn’t be parked here.小轿车不可以停放在这里。
4. Almst all f it can be reused r recycled!1) 此句为含有情态动词的被动语态，其构成形式为：情态动词(can / may / must / shuld) +be + 过去分词。
2) re-是前缀，意思是“再，重新”。例：rewrite, replay, reappear, rebuild, remarry等。reuse意思是“重新使用；再使用”。例：She ften reuses ld envelpes.她经常重复使用旧信封。recycle意思是“使再循环；使……重新利用，重复利用”。例：They recycle empty tins s as t use the metal.他们回收空罐头盒以利用其金属。
5. Peple thrw t much away.【辨析】t much、t many与much t
t much:t many:much t:
太多，修饰可数名词的复数。
太多，修饰不可数名词或修饰比较级，含有“过分，难以接受”之意。
6. One f the wheels is brken. ne f… ……之一。它后面跟可数名词复数。它作主语时，谓语动词用第三人称单数形式。例：One f my friends cmes frm Canada. 我的一个朋友来自加拿大。
7. It's dangerus t leave brken glass n the grund.(1)该句中it是形式主语，真正的主语是“t leave brken glass n the grund”。(2)leave v．使保留；让……处于(某种状态、某地等)。其后可接名词、形容词、动词不定式、现在分词、过去分词或介词短语充当宾语补足语。
该句中 “leave brken glass n the grund” 的结构为“leave＋名词＋介词短语”。例：Dn't leave yur scks n the sfa. 不要把你的袜子放在沙发上。
8. Once, I cut my ft n a piece f brken glass. a piece f 一张/一片/一块…… 它后面常跟不可数名词，但是要注意piece 是可数名词。该短语作主语时，谓语动词的数取决于piece的单复数形式。例：I have a piece f gd news t tell yu. 我有一条好消息要告诉你。
1. it 的用法：（1）it作代词it不仅可以指代具体的物品，而且还可以指代时间、距离、路程、天气等。例：It is half past five nw.现在五点半了。 It is sunny and ht in my hmetwn in summer. 在我的家乡夏季晴朗、炎热。
（2）it作形式主语当句子的主语过长时，为避免头重脚轻通常将it置于句首作形式主语，而将真正的主语(通常是不定式短语、动名词或主语从句)放在句子的后面。例：It is imprtant fr us t use English as much as pssible. 对我们来说尽可能多地使用英语是很重要的。It is reprted that there will be a thunderstrm tmrrw. 据报道明天将会有一场暴风雨。
（3）it作形式宾语当句子的宾语过长时，常用it作形式宾语，用来代替真正的宾语(通常是不定式短语、动名词或宾语从句)。例：I fund it hard t walk thrugh the frest in five hurs. 我发现在五个小时之内穿越森林是件很困难的事。Jim thinks it is a pity that he didn't win the first place in the English cmpetitin. 没有在英语竞赛中获得第一名，吉姆觉得很遗憾。
2. 动词不定式作主语的用法
动词不定式的基本形式为“t + 动词原形”，其否定形式是“nt + 动词原形”。它能起名词的作用，在句子中充当主语、表语、宾语和宾语补足语。动词不定式在作主语时，常用it作形式主语，而往往将动词不定式放在谓语或表语之后。例：It’s nt easy t learn a freign language well.(= T learn a freign language well is nt easy.)学好一门外语不容易。
在此句型中，如果要说明动词不定式的动作是谁做的，可在不定式前加一个fr引起的短语，作不定式的逻辑主语。即：It is + 形容词 + fr sb. + t d sth.(对某人来说做……是……)。例：It’s difficult fr us t finish the wrk. 对我们来说，完成这项工作很困难。 It’s hard fr me t answer yur questin. 要我回答你的问题很难。
但是，如果表语是kind, nice, right, wrng, clever, plite等描述行为者的性格、品质的形容词，则应在不定式前加一个f引起的短语。即：It is + 形容词 + f sb + t d sth (某人做……是……)。例：It is kind f yu t help me with my lessns. 你帮助我做功课，太好了。 It is s nice f yu t cme t see me. 你来看我太好了。
It takes/tk + sb + sme time + t d sth 意为“做……花了某人多少时间”例：It takes her an hur t review her lessns every day.她每天花一个小时复习功课。It tk mre than 100,000 slaves twenty years t build the Great Pyramid.十万多个奴隶花了20年的时间建成了那座大金字塔。
It is + 名词 + t d sth 意为“做……是……”例：It is ur duty t serve the peple.为人民服务是我们的责任。It is an hnur t make a speech here. 在这儿演讲很荣幸。注意： 动词不定式作主语，同时有一个不定式作表语时，不能转换成“It’s … t d sth.”的句型。例：[正]T see is t believe. [误]It’s t believe t see. 百闻不如一见。
This beautiful bwl is made f _____ (金属).2. The streets sn e______ when the rain began. She fund the ring while s______ sme clthes. When my clthes are wrn ut, I generally _____ them _____(扔掉).
一、根据句意和首字母及汉语提示完成句子。
5. There isn't much metal in the bdywrk f this new car. It’s mainly ______(塑料). 6. The Japanese r______ mre than half their waste paper. 7. Please wait at the schl gate. Jhn will ___ yu ___ there. 8. Abut tw percent f fast-fd packaging ends up as l_____ (垃圾).
1. It is nt always easy _____ invitatins. A. t refuse B. refusing C. t be refused D. being refused2. It is bad fr yur eyes ___ cmputer games t much. A. plays B. t play C. play D. playing3. It _____ him fur hurs and a half t d the wrk. A. spent B. used C. needed D. tk
4. It was careless _____ him t break the cffee cups. A. fr B. t C. with D. f5. What a pleasure___ with them! A. is it t wrk B. it is t wrk C. t wrk D. t be wrked
1. Learn sme new wrds and expressins.2. Be able t understand the passage .3. Learn the usage f it and the infinitive as the subject.