就是要举例说明来支持你的观点，为什么你觉得这种变化是好的，或者是坏的。

　　完整的高分答案框架：

　　简单介绍现在完成时的使用，并说明变化的程度。
　　内容：几个变化的方面。
　　讲述过去，使用过去时态，讲述这几个方面的过去状态。
　　讲述变化，说明变化原因，看这几个方面发生了怎样的变化。
　　讲述现在，使用现在时和形容词的比较级。
　　结论：变化的影响，是好的方面。

　　My hometown has experienced rapid growth in recent years.
　　The streets are wider and the buildings are cleaner.
　　In the past, the streets in my hometown were very narrow and the buildings were old and dirty.
　　However, because of the economic development due to tourism,
　　the streets are now much wider and cleaner and the building are more modern.
　　Overall, I think this is a good development for my hometown.

　　来源：