改成动词的非限定形式

题目

改成动词的非限定形式
I hope that l can win the competition in the end.
I spent the whole morning typing the documents my boss had given me
English is so diffcult that many students can't learn it well
They studied as hard as they could so that they could get good marks in the final exan

答案

I hope to win the competition in the end.
I spent the whole morning typing the documents given to me by my boss.
English is too difficult for many students to learn it well
They studied as hard as possible in order to get good marks in the final exam.