a positive change that has happened in my country is having subways前面绝对没错,就不知道是不是用is having
问题描述：
a positive change that has happened in my country is having subways前面绝对没错,就不知道是不是用is having
如果不对，能帮忙改成完整的话吗？前面a positive change that has happened in my country不变，后面表达有地铁的意思！
答
原句有误,改为：
A positive change that has happened in my country is that subways have been opened.
用that引导的宾语从句