there ...great changes in my hometown in the last ten years为什么用have been

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there ...great changes in my hometown in the last ten years为什么用have been
there ...great changes in my hometown in the last ten years
为什么用have been

there ...great changes in my hometown in the last ten years为什么用have been
There have been great changes in my hometown in the last ten years.
解析:in the last ten years 为表示一段时间的时间状语
所以句子要用 现在完成时