6。表示目的

　　1)The purpose of a test is to show what you have leaned about a subject。

　　2)The intent is not to catch everyone but rather to catch enough to spread the word。

　　3)Competitive sports are recommended to young adults to prepare them for the competitive world of college and business。

　　7。表示结果

　　1)Too much work and too little rest may lead to loss of health。

　　2)If you try to learn too many things at a time，you may get confused。

　　3)By consistent hard work we will be able to achieved our objectives (目标)。

　　8。表示对比和比较

　　1)Jobs and work do much more than most of us realize to provide happiness and contentment。

　　2)Work is more than a necessity for most human beings；it is the focus of their lives，the source of their identity and creativity。

　　3)Rather than a punishment or a burden，work is the opportunity to realize one's potential。

　　4)The more scientists find out，the more questions they are unable to answer.examda

　　9。表示条件或假设的结构

　　1)Without the distraction of TV，they might sit around together after dinner。

　　2)As long as the brain is given plenty of exercise it keeps its power。

　　3)Were it left to me to decide whether we should _______，I should not hesitate a moment to prefer the latter。

　　4)Without a degree and with no vocational experience their chances of getting good jobs are slim。

　　10。表示举例

　　1)Take______for example，

　　2)An illustration(例证)may make the point clear。

　　11。表示采取措施

　　1)The government should be taking effective(有效的)measures to overcome current difficulties。

　　2)As college students，we are obliged to make every effort to help support the Olymic Games。

　　3)The school authorities should invest more energy and money in improving working and living conditions for the teachers。

　　12。表示让步关系

　　1)While it may be more convenient to possess a car，it is also expensive and troublesome at times。

　　2)Although I do not earn a great deal of money for this job，the pleasure I receive from the work makes it worthwhile。

　　13。表示因果或前提关系

　　1)Because of(owing to)the pressure(压力)of examinations，many students are left with little or no free time。

　　2)Perhaps it's because few of us know how to accept compliments(赞扬)gracefully。

　　3)That is why housework is considered as such a dreary grind(乏味的苦差事)。

　　4)The reason for this is that

　　14。表示存在的问题

　　1)One of the greatest problems facing the 21st century will be what to do with all the rubbish produced in the world。

　　2)To travel abroad is a desire shared by many people，but few can afford to do it。

　　3)Cheating is now considered to be a major problem in colleges and universities。

　　4)Many people find it harder and harder to keep up with the radical changes that characterize our time。

　　5)At first thought，the problem seems far too involved (复杂)，but it can certainly be solved when seriously dealt with 。

　　15.There be结构

　　1)There are other techniques that might help you with you studying。

　　2)There is much that we can learn from the Chinese classic works。

　　3)There is no sense(道理)in leaving important decisions to inexperienced people。