The scientists have found it hard to clone a new healthy being.
问题描述：
The scientists have found it hard to clone a new healthy being.
这一句的语法点或知识点是什么
答
本句中it为形式宾语,真正的宾语是不定式to clone a new healthy being.
find + 宾语+宾补的结构, hard为宾语补足语