So much has changed 许多东西已改变.
主语so much许多东西,谓语has changed已改变.
Yesterday Once More《昨日重现》第二段第一节最后一句
Looking back on how it was in years gone by 回过头来看看走过的岁月,
And the good times that I had 和曾经美好的时光,
makes today seem rather sad, 如今的生活是如此令人心伤,
So much has changed. 多少东西都已改变,无法阻挡!