1） To prevent this phenomenon/trend from worsening/running wide/To guide the matter/situation to the best advantage,it is necessary/important to……（可用于分析建议类、原因分析类等议论文）
2） In the face of……some people take the position that……/some people come to believe that……,to which I can't attach/add my consent.（可用于批驳分析类议论文）
或：In the face of……people retain/take/show/assume different attitudes/position s/standpoints.（可用于各抒己见类议论文）
或：In the face of……many people have come up with……（可用于对比分析类议论文和知识性说明文等）
3） But many people feel puzzled about/perplexed at/over whelmed with……（the changes/situation）,so this essay is intended to……（可用于批驳分析类议论文和知识性说明文）
4） Although lots of people follow the fashion/trend,I still set my heart on……（可用于理由陈述类议论文）
5） To get a sense of how……we must turn first to causes for it/to what benefit