评论型作文也称开放型议论文，因为文章只是客观地分析和评论某一事物的正反两方面，或在某一问题上反映出来的两种不同看法，并不下结论说这个事物对或错，这个看法正确与否。

句型结构：

 
P1: S1 Topic: the issue to be commented
   S2 Thesis: different attitudes towards it
P2: S3 Its advantages or one’s side’s opinion
   S4 Detail 1
   S5 Detail 2
   S6 Transition
   S7 Its disadvantages or the other side’s opinion
   S8 Detail 1
   S9 Detail 2
P3: S10 The balanced view
Sentence Pattern
S1: Why should we…? Does …? Such question as these are often asked, especially by those…
S2: The answers to these questions                   vary from
   Opinion of the issue                  often      differ sharply/ widely.
   Attitude towards the problem
S3: Some people argue/maintain         that …
   As is often/frequently pointed out 
S4: There is no       doubt      that…
                   denying 
S5: It certainly      helps      people       to solve /enjoy/ benefit…
                  offers                 greater opportunity/chance to