1、表示目的

　　1.The purpose of a test is to show what you have learned about a subject

　　2. Believe it or not, her only purpose in saying all that is to help you help yourself

　　3.Competitive sports are recommended to young adults to prepare them for the competitive world of colleges and business

　　4.The ultimate object of scientific inquiry is to discover the laws of nature.

　　2、主語從句結構

　　1.What makes it rather disturbing is the fact that the environment we are living in is going from bad to worse.

　　2.What I remember then is not her failure, but her courage, the courage to go ahead.

　　3、過渡句

　　1.This is not necessarily the case, however.

　　2.Good intentions alone are not enough

　　3.But modern research has found that this is not so.

　　4.What does this mean as far as the project hope is concerned?

　　5.As far as I am concerned, some people are lucky while others seem marked by bad fortune.

　　6.What is point of being rich?

　　7.Yet there are advantages to rural life.

　　4、遞進式結構

　　1.Fresh vegetables are nutrious; furthermore, they are cheaper than frozen ones.

　　2.We will not only bring joy into other people’s lives,but also added happiness into our own.

　　3.But teaching offers something besides money and power:it offers love. Not only the love of learning and of books and ideas ,but also the love that teacher feels for his students

　　4.They do not seem to like one another very much. Neither are they too keen on conventional people.(正統的人)

　　5、It結構

　　1.It is advisable to exercise patience in dealing with such complicated situation

　　2.It is advisable to place important telephone numbers next to the phone in case of an emergency

　　3.It is biologically reasonable for deer to reduce their cost of living to increase their chances of surviving in winter.

　　4.It is essential that the increase in production should be geared to the increase in public demand

　　5.It is necessary that young and old people should communicate more with each other

　　6.It is thoughtless of some parents to allow their children to watch whatever program is on television

　　7.It is incredible (不可思議)that he ate the big cake just in two bites

　　8.It was obvious to everyone that the marriage would sooner or later end in separation if not divorce.

　　9.It was clear that Dad could do no more than he was doing already

　　10.It is certain that fresh air and exercises are more valuable than medicine

　　11.It is certain that with determination and hard work you will succeed eventually

　　12.It was quite apparent that both sides were making a great effort to win the prize

　　13.It was almost impossible for an Indian to gain even a fair education and extremely difficult ,as a result, for an Indian to rise high in life

　　14.It is easy to size up (估計)the situation right now. For we are not well informed on recent developments

　　15.It is not easy to say exactly what each part of the brain does.

　　16.It is not wise to change your money into U.S. currency

　　17.It is only recently that science has begun to give us some idea of how the brain really works

　　18.It will take the council a few weeks to judge the situation before it takes any further action

　　19.It is well known that many of our problems are caused at least in part by failure to communicate

　　20.It remains unknown whether there are intelligent beings outside the solar system

　　21.It is reported that the electronic industry is going on rapidly in recent year

　　22.It is reported that there has been a decrease in the annual birth rate over the last two decades.

　　23.It seems to me that the Americans are a highly mobile people. Most of them like to travel whenever they get the chance

　　24.It seemed to me that the only thing that mattered was to get her husband back to her.

　　25.It is an encouraging sign that people’s purchasing power is on the rise

　　26.It is common knowledge that people benefit a lot from reading extensively

　　27.It used to be a popular belief that we could foretell a person’s future on the basis of the date and time of his birth.

　　28.It pays in the long run (從長遠地角度看)to introduce new technique

　　29.It may well come as a surprise to learn that not only psychologists but other behavioral scientists have come to accept the positive contribution of work to the individual’s happiness and sense of personal achievement.

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