此类作文要求对某一现象或事物的优点或缺点进行正反两方面的分析，最后得出结论或发表自己的看法。注意是针对一件事物，要与比较分析类相区分。
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Nowadays, there is awidespread concern over (the issue that)_________________. In fact, there areboth advantages and disadvantages in X. Generally speaking, it is widelybelieved there are several positive aspects as follows. Firstly,_________________________. And secondly _________________________。
Just As a popular sayinggoes, "every coin has two sides", X is no exception, and in anotherword, it still has negative aspects. To begin with, _____________________. Inaddition, ______________________________。
To sum up, we should tryto bring the advantages of X into full play, and reduce the disadvantages tothe minimum at the same time. In that case, we will definitely make a betteruse of the X。
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X now plays such animportant part in so many people’s lives that _____________________. Obviously,X has both advantages and disadvantages。
As is often pointed outthat, X makes us know ________________ so that __________________. In addition,_________________________. Yet here again, there is a danger. The main problemwith it is that _______________________________. It is criticized on thegrounds that it contributes to ______________________. Besides, _________________________。
In any case, whether theultimate of X is good or not, one thing is certain that __________________. Itis the uses to which it is put that determine its value to society。
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X has many advantages. Inthe first place, ____________________________. Second,___________________________. Third, ____________________________. For all theseadvantages, it is really worthwhile to _________________________________。
However, just aseverything has two sides, there are some disadvantages in _______________. Themost serious problem is ________________________. Besides,__________________________。
Therefore,given an opportunity to ______________________, one must consider both sides offactors carefully before making up his mind. On the whole, it is a good thingto __________________, but on the other hand, one must not lose sight into forthe advantages。
