1 、对立法 : 先引出其他人的不同看法,然后提出自己的看法或者偏向于某一看法,
[1]. When asked about....., the vast majority of people say that ....... But I view a bit differently.
[2]. When it comes to .... , some people bielive that ....... Others claim that the opposite is true . There is probably some truth in both arguements, but I tend to the latter(后者;(二者中)后者的) ...
[3]. Now, it is commonly acknowledged that .... They claim that ... But I wonde r whether.....
2 现象法：引出要剖析的现象或者问题, 然后评论
[1]. Recently the rise inphenomenon of ... has aroused public worldwide concern.
[2]. Recently the issue of the problem of ...has been brought into focus.
[3].Inflation(通货膨胀)/Corruption(贪污 腐败)/Social inequality(不平等) ... is yet another of the new and bitter truth we have to learn to face constantly.
3 观点法：开门见山,直接了当地提出自己对要讨论的问题的看法.
[1]. Now people in significant numbers are coming to realize that...
[3]. Now there is a growing awareness of the necessity to......Now people become increasingly conscious of the importance of ......
[4]. Perhaps it is time to have a fresh look at the attitude that.......