１．说明事物现状
２．事物本身的优缺点（或一方面）
３．你对现状（或前景）的看法
Nowadays many people prefer A because it has a significant role in our daily life. Generally, its advantages can be seen as follows. First ----------------(Ａ的优点之一). Besides -------------------（Ａ的优点之二）.
But every coin has two sides. The negative aspects are also apparent. One of the important disadvantages is that ----------------(Ａ的第一个缺点)．To make matters worse,------------------(Ａ的第二个 缺点)．
Through the above analysis, I believe that the positive aspects overweigh the negative ones. Therefore, I would like to ---------------(我的看法)．
(From the comparison between these positive and negative effects of A, we should take it reasonably and do it according to the circumstances we are in. Only by this way, ---------------(对前景的预测)．)
★★★议论文的框架
(1) 不同观点列举型（ 选择型 ）
