In the past several years,i had many chances to inspect many places of China
问题描述：
In the past several years,i had many chances to inspect many places of China
答
1. 楼上说的有道理,不知道楼主用inspect想要表达什么含义.
2. 另外,还有一个关键错误：如果句子时间状语是“in the past/last + 一段时间”时,则该句只能使用现在完成时或现在完成进行时.
所以,还需要把had改成have had.
have作为谓语动词时,不能用于进行时态,也不能用于现在完成时态.