【问】 Why must she be so nasty to me?

请问这里的must是什么意思?

【答】 must还有一种含义：“偏要”、“硬要”。表示说话人对主语所发出的动作或行为是不希望的，不满的甚至是生气的。must用于第二人称时，常常含有讽刺挖苦的意思：

1. Why must you be so stubborn? (《新英汉词典》)

你为什么偏要这么固执呢?

2. He must come and worry her with questions，just when she was busy cooking the din-

ner.(ALD)

正当她忙着做饭的时候，他偏偏来问一些问题打扰她。

3. Just when we were ready to go away for the holidays，the baby must catch measles.

(ALD)

正当我们准备动身去度假的时候，婴儿偏偏患上了麻疹。

4. If you must smoke，at least you could use an ashtray.(CGEL)

如果你偏要抽烟，那你至少要用个烟灰缸。

5. If you must know，I’m going to help him look for an appartment.(EED)如果你偏要知道，那我告诉你，我要去帮助他找一套公寓。

6. Why must it always rain on Saturdays?

为什么偏偏星期六总是下雨?

7. As I was sitting down to lunch. the electric bell must ring.

我刚要坐下来吃午饭，电铃偏偏这时响了起来。