found it hard to be polite

He finds it h____ to be polite. i found it important to stard hard I found it hard to living. I found it hard to understood i found it hard to be understood.为什么不能这样说? We found that it was too hard to find out the differences be How to be polite I found it was hard to talk with her=I found () hard () with "It costs nothing to be polite" said Winston S.Churchill It cost nothing to be polite的中文意思 it does not hurt to be polite翻译 The man found it hard to fall _____ (sleep).