He devoted all his life to work hard in people`s interests.这句话怎么错了?

问题描述:

He devoted all his life to work hard in people`s interests.
这句话怎么错了?

He devoted all his life to working hard in people`s interests.

devote sth to doing…
另 人们的利益
最好写成 the interests of the people

work 应该改成working
devote sth to doing,因为to是介词.