needing a lot of effort, skill, etc.; hard to do, make, understand, or deal with; not easy
hard to deal with; not easy to please or persuade
"a difficult task"
"nesting places on the cliffs are difficult of access"
"why is it so hard for you to keep a secret?"
"a difficult child"
"an unmanageable situation"
Knowledge..is difficult to gain.
It is difficult to imagine a more universal disaster.
出自： J. L. Motley
Some harbours..are made difficult of access by..sunken rocks.
出自： J. Conrad
Help to see him through the difficult weeks ahead.
误 The sentence is difficult to be understood.
正 The sentence is difficult to understand.
误 He is very difficult to learn languages.
正 It's very difficult for him to learn languages.
误 I am difficult to understand the article.
正 It's difficult for me to understand the article.
析 difficult表示“难的,困难的”,一般用来指物,不以“人”作主语,并且须用“It is/was difficult for sb to- v ”的结构。