trouble作“麻烦”“困难”解时是不可数名词，作“给人添麻烦的人”“麻烦事”解时是可数名词。trouble可用作及物动词，也可用作不及物动词。用作及物动词时，后接名词、代词或动词不定式作宾语。常用短语：ask for trouble；make trouble。

trouble的用法例句：

1. She dropped out after 20 kilometers with stomach trouble.

20公里后她因胃痛而退出了比赛。

2. Her husband had never before had any heart trouble.

她丈夫以前从来没得过任何心脏疾病。

3. A dentist may decide to extract the tooth to prevent recurrent trouble.

牙医可能会决定拔掉那颗牙，以免反复发作。

4. She was fitted with a pacemaker after suffering serious heart trouble.

她患上严重的心脏病后安装了心脏起搏器。

5. Might I trouble you for a drop more tea?

能否麻烦您再添一点茶?