写作： 

列举法: 

  一系列事情，用诸多原因来阐明一件事情的原因。常用列举法。常用first,firstly,in the forst place,forst of all,in the beginning, to begin with,second,secondly,third,thirdly,next,besides,in addition,moreover,finally,last,lastly,also,another,still another,above all,most inportantly 等词汇连接。

举例法：为使文章更有说服力，常用举例法。常用for example,for instance,as an exple,as a first example,in another instance,take...as an example等词汇连接。