这个句子是形式主语句型吗

题目

这个句子是形式主语句型吗
Eating vegetables and fruit are good for him.
如果不是，请帮我改成 形式主语句型

答案

Eating vegetables and fruit are good for him.是动名词做主语.
但原句子不对,Eating vegetables and fruit 是动名词,应为单数主语：
Eating vegetables and fruit is good for him.
如果改为形式主语,是这样的：
It is good for him to eat vegetables and fruit.句子意思不变.