It is difficult to do sth, 或 Doing sth
is difficult. To do sth is difficult.
都可以表示, 做某事很难。
还有个很常见的短语, have difficulty to do sth一般to do和doing的区别：
前者表示偶尔的动作；后者表示常有的习惯；
如: I have difficulty to do my homework;
Ihave difficulty doing my homework; 前者表示：我这次的作业难住我了； 后者表示：我经常都觉得我的作业做起来很难；
It's difficult to do sth与It's difficult doing sth
英语说it’s difficult to do sth肯定是对的。
如：
It’s difficult to describe how I feel. 很难描述我的感受。
It’s difficult to understand anything he says. 要理解他说的话很困难。
It’s difficult to get into a university nowadays. 如今进大学读书是难事。
It’s difficult describing how I feel. 很难描述我的感受。
It’s difficult understanding anything he says. 要理解他说的话很困难。
It’s difficult getting into a university nowadays. 如今进大学读书是难事。
