1. Have difficulty (in) doing something
结构：have difficulty (in) + 动名词
例句：
She has difficulty (in) understanding accents.
They had difficulty solving the math problem.
2. Have trouble doing something
结构：have trouble + 动名词
例句：
I have trouble falling asleep at night.
He had trouble adapting to the new environment.
3. Struggle with something
结构：struggle with + 名词/动名词
例句：
Many students struggle with essay writing.
He’s struggling with the new software.
4. Find it difficult to do something
结构：find it difficult + 不定式
例句：
I find it difficult to concentrate in noisy places.
They found it difficult to meet the deadline.
5. Have a hard time doing something
结构：have a hard time + 动名词
例句：
She had a hard time learning to drive.
We’re having a hard time keeping up with the workload.
6. Face challenges in...
结构：face challenges in + 名词/动名词
（较正式，多用于书面）
例句：
The company faces challenges in expanding overseas.
Students often face challenges in time management.
⚠️ 常见错误提醒：
错误：have difficulty to do something
正确：have difficulty doing something
根据语境可选择不同表达。需要具体例句或进一步解释可补充说明！
