我上英文网查了些资料，recommend最正确的用法是recommend+doing或that从句，即：I recommend (that) sb (should) do something.
如果用it做形式主语，句子可以变成“It is recommended that sb (should) do something.”
那It is recommended to do something是否正确？我查了一些使用案例，好想存在这样的表达方式（不知道是否权威），根据不定式做主语从句的规则好像也行得通，即：to do something is recommended.
好困惑，望有研究过的大佬们解答