He was really very small. However,criminals became afraid just looking into his eyes.

VOA: special.2010.03.17

But I'm afraid that our musicians are very tired.

但是看来我们的音乐师们现在都非常疲惫了。

That's all实战 - SpeakingMax英语口语达人

I think you'll find "I'm afraid of" very useful

我想你会发现“I'm afraid of”是个非常有用的句型。

I'm afraid of 课堂 - SpeakingMax英语口语达人

"My dear Fortunato," I said, "I'm afraid I have been very stupid.

VOA: special.2009.02.07