She said that go shopping early in the morning was better.这句话中“go”为什么改成“going”?

问题描述:

She said that go shopping early in the morning was better.这句话中“go”为什么改成“going”?

这道题中going shopping early in the moring was better是从句,从句中动名词going shopping是主语.用动词做主语时,应用ing形式