Unit 6 Mainly revision

，可用被动语态）。如：
　　I don’t agree with you on this problem． 在这问题上，我不同意你的意见。
　　We agreed on how to protect the environment. 就如何保护环境一事，我们取得了一致的意见。
　　4．“找”search, seek, hunt for, find, find out, look for
　　A.search通常指对某处、某地进行搜查或搜索；对人时为“搜身”。常接for构成短语search for，作“寻找；搜寻”解，其对象多为一个或一批人或物，如找矿，找资料，找文件，找工作等。它强调寻找的行为，不着重结果。如：
　　The police searched him but nothing was found on him． 警方搜了他的身，但什么也没找到。
　　They are searching for the missing child．他们在寻找失踪的孩子。
　　B.seek一般用于抽象意义，有时也表示渴望得到某一具体的东西，是比较正式的书面用法。可构成seek for，seek after等短语，作“寻找，设法得到”等解。其后可接动词不定式，此时表示“试图，企图”。如：
　　They seek information from various sources. 他们从各种来源收集信息。
　　They seek after the truth． 他们追求真理。
　　C.hunt for指竭力搜寻，其搜寻对象往往是某种迫切需要的东西或人。如：
　　This is just the thing I am hunting for. 这正是我在找的东西。
　　They’ve been hunting for you everywhere. 他们一直在到处找你。
　　D. look for强调找的过程。如：
　　He is looking for his dictionary bought yesterday. 他在找昨天买的那本词典。
　　E.find通常强调找的结果。其后可跟名词、复合结构或that从句。如：
　　Use your head, then you’ll find a way. 开动脑筋，就会有办法的。
　　He found his home village unchanged. 他发现家乡还是老样子。
　　F.find out通过观察、调查、询问等方式找出（原因等），或发现（秘密、错误）情况等，其后一般跟名词、代词或从句。如：
　　Have you found out his address? 你查到他的住址了吗？
　　Please find out when the train leaves. 请打听一下火车什么时候开。
　　5. suppose，guess及imagine的用法比较
　　A.suppose常指根据一些证据而得出的推断，强调暂时性，可接不定式（特别是to be）、介词短语、形容词等的复合结构，接从句等，作“假定，猜想”等解。如：
　　We all supposed him to be an actor．我们都以为他是个演员。
　　Let’s suppose he is right． 让我们假定他是对的。
　　B.guess表达说话人在缺乏了解和证据时所陈述的见解，其后可接名词、复合宾语、从句。如：
　　I should guess the old woman to be about sixty．我猜这位老太太六十岁上下。
　　Guess how much it is worth．猜猜看这东西值多少钱。
　　C.imagine指没有充分证据或单凭某种模糊印象和感觉而设想、推断。它跟guess一样，都是缺乏证据的。其后可接名词、v-ing的复合宾语、从句，还可与as连用。如：
　　We can hardly imagine life without electricity．我们简直无法想象没有电的生活会怎么样。
　　I can’t imagine you/ your living alone in the small mountain village．
　　我简直不能想象你竟然独自住在小山村里。
　　6.be about to，be ready to的辨析：
　　这两个复合助动词都作“乐意”讲，但有区别：前者总是用于肯定结构，而后者则既可用于肯定结构又可用于否定结构。（注：美国英语往往把be not about to作“不愿意”讲。）
　　比较：James was about to pay the bill．詹姆斯乐意掏钱付帐。（与 was ready to通用）
　　James was not ready to pay the bill．詹姆斯不乐意掏钱付账。（不说He was not about to pay the bill．）
　　7.if only,so long as作“只要”讲时的区别：
　　A.这两个复合连词同义，都作“只要”讲，但不一定能通用：if only只能连接表达一时动作的从句（参见词条517和519），而as／so long as则限于连接含有“持续”意义或表达存在的从句（参见词条583）。
　　例如：If only I have any chance，I shall try again．只要有机会，我将再试它一下。（所连接的从句没有“持续”的含义）
　　So long as he remains reactionary，no revolutionary peoplewill take united action with him．只要他保持反动不变，就没有革命人民同他采取联合行动。（所连接的从句含有“持续”的含义）
　　So long as there are still many things which we don't knowand in which we lack experience we must be good at learningfrom other countries'strong points．只要我们还有许多东西不懂或缺乏经验，我们就该向别的国家学习它们的长处.（所连接的从句中含有“存在”的意义）
　　B.其次，前者多少含有“怀疑”的意境色彩，而后者则没有这种意思。
比较：Betty will do the job well if only she works hard．只要贝蒂好好干，她是会把工作搞好的。（多少存有怀疑）
　　Betty will do the job well so long as she works hard．只要贝蒂好好干，她是会把工作搞好的。（未必有怀疑）

教学设计示例Lesson22

Step I.Introduction:Show some pictures about pollution.

StepII.Fast reading:

A. Search for answers:(Now, I’ll give you 2 minutes to find out the answers:

　　1.what international organization has been mentioned in the text?

　　2.In China, what is becoming a serious problem?

B. Read again and answerT or F:

　　1. If waste is poured into rivers or seas without being treated,what will happen?

　　2. How is dangerous waste uauslly dealt with?

　　3.  What problems does throwing away rubbish cause in western countries?

　　4.  What is the situation like in China?

　　5.  What has been done for environmental protection?

Step III.Fill in blanks.

Dealing with waste

　　1.Waste must be__treated___ so that it doesnot become a danger to life.(paragraph1)

　　2.When this river finally reaches the sea, it pollutes the ocean. (paragraph1)

　　3.Human waste is piped directly into the sea without being treated. (paragraph2)

　　4.It is now against the law to throw anything into the sea within 5 kilomnetres of land. (paragraph3)

　　5.They seek to reduce waste, protect the earth,  the oceans and all forms of life in them. (paragraph5)

The throw-away society

　　1.This causes many problems.  (paragraph1)

　　2.This is a particular problem for large cities. (paragraph1)

　　3.InChina,rubbish,such as used plastic bags and boxes known as “whitepollution”. (paragraph1)

Step IV.Group work .(Divide the class into several groups and provide them with some topics of the text ,such as :

　　1)How do people pollute the Ocean?(based on the text,the Ss can add something.)

　　2)How do people protect the sea and stop the pollution? (based on the text,the Ss can add something.)

　　3)What are the problems in China? (based on the text,the Ss can add something.)

(Give them some minutes to prepare and say their opinions)

Step V. Languag points:

　　1.break down与 break up

　　break down:“分解”，可指物理变化或化学变化，如：

　　After many years,rocks broke down into dirt.（经过多年以后，岩石就分解成尘埃。）

　　Water can be broken down into hydrogen and oxygen.(水可以分解成氢和氧)

　　当表示“拆散”意思时，break down 与 break up 通用。如：

　　The old cars were broken down \up for their parts.(旧汽车被拆散以取得其零部件。)

　　break up:“撞毁，解体”如：

　　The ship was breaking up on the rock.(船在礁石上撞毁。)

　　2.depend on :“取决于…““靠…决定”如：

　

《Unit 6 Mainly revision(第3页)》