"Be worried about" 是一个表达担忧或忧虑的常用短语。当这个短语后面接句子时，通常会以从句（Subordinate Clause）的形式出现，用来具体说明导致担忧的原因或情况。以下是一些例句：
1. I am worried about his safety because he hasn't arrived yet.
  - 我担心他的安全，因为他还没有到达。
2. She is worried about the upcoming exams as she hasn't had much time to prepare.
  - 她担心即将来临的考试，因为她没有太多准备时间。
be about to3. We are worried about the financial situation of the company since profits have been declining.
  - 我们担心公司的财务状况，因为利润一直在下降。
4. He is worried about his health now that he has been feeling tired all the time.
  - 他担心自己的健康，因为他一直感到疲倦。
5. They are worried about their daughter's grades because she has been struggling in school lately.
  - 他们担心女儿的成绩，因为她最近在学校里有些困难。
在这些例句中，从句进一步说明了为什么人们感到担忧，从而加深了理解担忧的原因。

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