1、Ihas both advantages and disadvantages既有利又有弊。例如：1Obviously television has both advantages and disadvantages2Living in a city has both advantages and disadvantages3Com pared with cars，bikes have their advantages and disadvantages举一反三：1Although computers bring people a lot of convenience，they have man
2、y disadvantages2has many advantagesFor example，However，just as every coin has two sides，has its disadvantages（本例将利弊分开讲，转折过渡自然。just as every coin has two sides也很值得背诵。）IIplay（s）an important role part in在中扮演重要角色起重要作用。例如：1Computers play an important role in science and technology2Computers play a more a
3、nd more important role in our lifeComputers play an increasingly important role in our studies3Education plays an important part in developing our mind4Addiction to alcohol and drugs play a role in homelessness举一反三：1Advertisement plays an informative role in our daily life2In the past，letters played
4、 a decisive role in long-distance communicationBut now ，telephone，email，fax have taken their placeIIIWith the development of，随着的发展，例如：1With the developm ent of our econo- m y，m any Chinese fam iliescan afford a car2With the development of our economy and society，pollution is more and more serious3Wi
5、th the rapid development of science and technology，people canget a college degree by taking online-courses at home4With the current social and technological developments，employees with more knowledge and higher academic degrees are needed举一反三：1With the rapid increase of Chinas population，housing pro
6、blem is becoming more and more serious随着中国人口的急剧增加，住房问题越来越突出。2With more and more women entering society，peoples attitude towards women is changing随着越来越多的妇女走入社会，人们对妇女的态度也在改变。3With the deepening of Chinese reform and opening up，an increasing number of Chinese families can afford a car随着中国改革开放的深入，越来越多的中
7、国家庭买得起车了。（“越来越多”除了常用的 more and more外，还可以用 an increasing number of， a growing number of，a significant number of，a great number of 等来表达。）本结构看似固定，实则富于变化，只要记住 with有“随着”的意思，相信大家可以根据实际的需要造出更多的句子。我们已经看到，开门见山的开头使论文直切主题，直白明确地提出了论点。不过在讨论某些有争议性的问题时，就显得有欠缺，因为我们必须在文章的开头引出人们对要讨论的问题的不同看法，然后再表明自己的观点。下面就是专门针对争议性论文的一
8、种句型。IVWhen it comes to，some people think believe that，others argue claim that opposite reverse is true There is probably some truth in both arguments statements，but当说到，有些人认为，但另一些人则持相反的观点。这两种观点可能都有点道理，但。本结构先用 when it comes to 引出话题，再用 someothers 这个对立的结构引出了两种相反的观点，然后说 There is some truth in both表明严谨公正的
9、态度，最后用 but很自然地引出了自己的论点。请看下面这个例子：TV，a good thing or bad thingWhen it comes to TV，some people believe that it is extremely valuable，as it provides relaxation， entertainment and education Others argue that it is harmful for it begins to control our lives and deprives people of time to do other activitiesThere is probably some truth in both sidesBut we must realize that television itself is neither good or badIt is the uses to which it is put that determines its value to society
