做某事困难英文怎么说两种说法

"It is difficult to do something"
"Doing something is difficult"

第一种说法是将困难当做客观事实，用 "it" 来表示。第二种说法是将困难当做主观感受，用 "doing something" 来表示。

例句1:
It is difficult to learn a new language. (学习一门新语言很困难)

例句2:
Doing math problems is difficult for me. (我做数学题很困难)