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新概念英语第四册第十七单元语法和句型
新概念英语第四册第十七单元语法和句型
Leon 17 A man-made disease 人为的疾病
In the early days of the settlement of Australia, enterprising settlers unwisely introduced the European rabbit.This rabbit had no natural enemies in the Antipodes, so that it multiplied with that promiscuous abandon characteristic of rabbits.It overran a whole continent.It caused devastation by burrowing and by devouring the herbage which might have maintained millions of sheep and cattle.Scientists discovered that this particular variety of rabbit(and apparently no other animal)was susceptible to a fatal virus disease, myxomatosis.By infecting animals and letting them loose in the burrows, local epidemics of this disease could be created.Later it was found that there was a type of mosquito which acted as the carrier of this disease and paed it on to the rabbits.So while the rest of the world was trying to get rid of mosquitoes, Australia was encouraging this one.It effectively spread the disease all over the continent and drastically reduced the rabbit population.It later became apparent that rabbits were developing a degree of resistance to this disease, so that the rabbit population was unlikely to be completely exterminated.There were hopes, however, that the problem of the rabbit would become manageable.Ironically, Europe, which had bequeathed the rabbit as a pest to Australia acquired this man-made disease as a pestilence.A French physician decided to get rid of the wild rabbits on his own estate and introduced myxomatosis.It did not, however, remain within the confines of his estate.It spread through France where wild rabbits are not generally regarded as a pest but as a sport and a useful food supply, and it spread to Britain where wild rabbits are regarded as a pest but where domesticated rabbits, equally susceptible to the disease, are the basis of a profitable fur industry.The question became one of whether Man could control the disease he had invented.【语法点】情态动词+完成体不定式
【课文原句】It caused devastation by burrowing and by devouring the herbage which might have maintained millions of sheep and cattle.【闯关例句】 1.have done sth must have done sth can have done sth could have done sth may have done sth 1
新概念英语第四册第十七单元语法和句型
might have done sth 2.present
status position
must be a teacher 3.be doing sth must be watching TV
poibility
ought to have done sth should have done sth
You must have left your handbag in the theatre.你一定是把手提包忘在剧院了。Jack ________（肯定有事耽误了）, or he’d be here by now.The prisoner ________（一定是从这条路逃走的）must have escaped this way, for there are footprints.They are sweating all over.They ________（一定在踢足球）.No matter how busy you were, you ________（至少可以寄张明信片）.You were stupid to go skiing there---you ________（会把你的腿摔断）.I could have climbed that mountain ten years ago.十年前我本来是能够登上那座山的。I ________（本可以成功）, but I didn’t try my best, so I feel regretful.You could have helped him in those circumstances.在那样的情况下，你本来可以帮助他的。
If Peter had been driving faster, he ________（可能丧命了）.If it weren’t for having to leave England, I might have been tempted by that oil company’s
新概念英语第四册第十七单元语法和句型
offer.要不是因为得离开英国的话，我可能会接受是由公司的聘请了。
It would be a good thing to write to him, I should have thought.给他写封信倒是很好，但是我没有想到。
Martha did not accept the bad news.She ________（本应把这当成一个寻求其他机会的信号）.If you doubt his ability, you________（本不该雇他）in the first place.I think I should have thought sometimes that you couldn’t help thinking of the past.我想我本来应该想到你不仅会想起过去。
The policeman said that the motorist ought to have stopped, but that he must have lost his head.警察说驾驶员当时是得停下来，要不然命都丢了。
In my opinion the offender ought to have been imprisoned, but they let him off with a caution.我认为罪犯应该判刑，但是他们给他个警告就释放了。
This road ought to have been finished six months ago.这条路六个月前就该修好。
You oughtn’t to have driven that car with the brakes out of order.You might have had a serious accident.你原不该驾驶那辆制动失效的汽车。你当时有可能会遇到严重的意外事故。
She ought not to have taken his books without asking him.没有问他她本来不应该把书拿走。
【语法点】主语从句
【课文原句】It later became apparent that rabbits were developing a degree of resistance to this disease, so that the rabbit population was unlikely to be completely exterminated.【闯关例句】
（1）It is certain that he will win the match.（2）It is true that he has made a very important discovery in chemistry.（3）It is very likely that they will hold a meeting.（4）It is strange that he should do that.（5）It is important that we all should attend the meeting.（6）It is strange that the man should have stuck to his silly ideas.（7）It is a pity that we won't be able to go to the south to spend our summer vacation.（8）It is still a mystery what caused the accident.（9）It is said that he has gone to shanghai.(=He is said to have gone to shanghai)（10）It is known to all that the gun powder was first invented by the Chinese.（11）It is suggested that the work should be done with great care.（12）It seems that he has seen the film.(=He seems to have seen the film)（13）It happened that the two cheats were there.(=The two cheats happened to be there)________that he didn’t come.很遗憾他没来。
________ that he should know about this.他必须知道此事。________ that we be present.我们出席是至关重要的。
________ that this miion not fail.这项使命不失败至关重要。
________ that a meeting be convened this week.本周开一次会非常重要。
新概念英语第四册第十七单元语法和句型
________ that this tax be abolished.废除这个税是恰当的。
________ that so many people should lose their jobs.竟有这么多人失业这是不公平的。________ that she should have said nothing about it.她竟未谈及此事令人惊讶。
________ that they should deny my request.他们竟然拒绝我的请求，这是不可思议的。
【语法点】there be句型中的同位语从句
【课文原句】There were hopes, however, that the problem of the rabbit would become manageable.【闯关例句】
There are ___signs_____that the situation may be improving.有迹象表明情况可能好转。There can be __no doubt______about his being the best man for the position.毫无疑问，他是这职位的最适当人选。
There is __no poibility ______ that Bob can win the first prize in the match.鲍勃不可能赢得比赛的一等奖。
There were unmistakable ___proof _____ that john had eaten up the jam.有确切的证据证明约翰吃完了果酱。
There’s ___chance likelihood__probability ___ of my flight being delayed.In that event I’ll phone to let you know.我的飞机可能会晚点，如果那样的话，我会打电话告诉你。Is there any ________that he will carry out(any certainty of his carrying out)his undertaking? 有什么把握他会执行他所承担的工作？
Is there any ________that the accused men(’s)being in the town the day the crime was committed? 有任何证据表明案发的那一天被告是在镇里吗？
Is there any ________ that their team will be(any likelihood, poibility of their team’s being)defeated? 他们的队有任何被击败的可能性吗？
So far there is ________that spaceships from other planets do exist.到目前为止还未证明来自其它行星的宇宙飞船确实存在。
There is __no guarantee ______ that the doctor would make her out of danger.还不能保证医生会使她脱险。
There is abundant ________that cars have a harmful effect on the environment.充分的证据表明，汽车对环境有害。
【语法点】介词宾语
【课文原句】The question became one of whether Man could control the disease he had invented.【闯关例句】
1、形容词
Her pronunciation is far from perfect________.她的发音远非完美。
2、副词
新概念英语第四册第十七单元语法和句型
His uncle is back from abroad________.他叔叔从国外回来。
They live somewhere_nearby near here _______.他们住在这附近。
3、介词短语
The boy jumped _from behind the door_______.这男孩从门后面跳了出来。
The ball rolled out from under the table ________.那个球从桌子底下滚出来了。
4、动名词
On arriving in Venice, we knew that it was a city of water.我们一到威尼斯就知道它是一座水城。
Don't forget to turn off the lights before leaving your claroom.离开教室以前别忘了关灯。
I succeeded in paing the driving test.我成功地通过了驾驶考试。
He entered the chemistry lab without being permitted.他未经允许就进入化学实验室。
5、动词原形
The policeman could not_but let _______ him go.警察无可奈何，只好让他走了。
His father had nothing to do all day except________.他的父亲整天无事可做，只是打牌。
6、不定式
The plane is about to take off.这架飞机快要起飞了。
The company had no choice but ________ me my money back.该公司除了向我退款外，别无办法。
7、数词
The students began to show up by ________.学生们开始三三两两地露面了。
When we went in we found his room at ________.我们走进去的时候发现他屋里乱七八糟。
It is a book of English phonetics, grammar and usage ________.这是一本集英语语音、语法和习惯用法于一体的书。
There was only one piece of cake, but we can cut it________.只有一块蛋糕，但我们可以把它切成两半。
8、分词
He spoke English so well that took it for _granted_______that he was an American.他讲英语讲得好极了，因此我一直认为他是美国人。
I took it for ____granted _____that'd you'd want to come with us,so I bought you a ticket.我认为你和我们一起去是理所当然的，所以给你买了一张票。
9、疑问句＋不定式短语
Marx gave us some advice on how to leaern English ________.马克思就怎样学习外语给了我们一些忠告。
10、从句
She got very angry because of what he said ________.她因为他说的话而非常生气。I am thinking of ________.我正在考虑怎样为人民做更多的事。
Remain stay Unconscious Verb
新概念英语第四册第十七单元语法和句型
Ashore
Shore
Sleep asleep Fire
afire Float
afloat Prefix in on
Enslave Encage Empower Entitle
Behead Befriend
Important Load v Trust v adj.unimportant
unload
v
mistrust
v
adj.6
新概念英语第四册第十七单元语法和句型
Scent Smell fragrance odour bad
ensue
the ensuing day
what will ensue from this?
A Crack between two rocks The door Opened a crack
