第一句： 描述背景 There are various different opinions on the subject of …

　　替换句型： there are widely differing views on the issue of whether …or not.

　　The issue of whether …or not is certainly a contentious one .

　　The past 20 years have seen a dramatic increase in …

　　The past 20 years have seen a considerable increase in …

　　These days , it seems that …

　　第二句： 引入话题 while some people might suggest that …,

　　替换句型：1. while some still hold to the view that …

　　2. this raises certain question about …

　　3. Despite the arguments of some people that …

　　第三句： 表达观点 I personally believe that …

　　替换句型：1. In this essay , I intend to argue that …

　　2. I would argue that the overall impact of …has in fact been negative /positive . Two of the primary drawbacks associated with this trend are asfollows .

　　3. Although there are valid arguments to the contrary , in this paper Iwill argue that

　　4. It is my believe that …

　　5. Personally I do not agree with this opinion , for the followingreasons

　　6. However , I am not a believer in the argument that …

　　7. I disagree with this point of view for the following reasons

　　第二段：(说理)

　　第一句： Firstly, obvious is a sight that …

　　替换句型：1. first of all , it is indisputable fact that …

　　2. first of all , it is an undeniable fact that …

　　3. it is an irrefutable fact that …

　　4. it is vitally important that …

　　5. one point which I believe to be absolutely pivotal is the fact that…

　　6. it is vital that …

　　第二句： This is because …

　　第三句： for example …

　　替换句型： This is particularly so given the fact that …

第三段： (举例)

　　第一句： In addition to this …

　　替换句型：1. Equally importantly , …

　　2. further and even more importantly ,

　　3. even more disturbing , is

　　4. secondly and more importantly , though , in order to …, it is essentialthat …

　　第二句：for example ,

　　替换句型： 1. one particularly good example of this is …

　　2. one particularly salient example of this is

　　第三句： …

　　第四段：(反方观点)

　　第一句：It is also true that …(反方观点)

　　替换句型：1. However , perhaps the strongest argument in favor of …is that …

　　2. Yet , perhaps the strongest argument in favor of …is that …

　　第二句：if …(极端，特殊情况下的一些合理性，进一步说明该段第一句话)

　　第三句：however ,

　　替换句型：however , this is unlikely to occur while …

　　第五段：(结论)

　　第一句：by way of conclusion , I once again reaffirm my position that …because…

　　第二句： Although they are by no means insurmountable , it is highly unlikelythat they will be resolved in foreseeable future .

　　结尾补充句型：

　　1. It , therefore , demands our further consideration .

　　2. Given the seriousness of the problems that it causes , I believe thatthis should be the ultimate goal.

　　3. therefore , it is clearly in our own interests to do sth.