I'm afraid you guessed wrong.

恐怕你猜错了。

《牛津词典》

I'm afraid I never wrote back.

我恐怕从未写过回信。

《牛津词典》

I'm afraid we can't come.

很遗憾，我们来不了。

《牛津词典》

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

VOA: special.2009.02.07

Okay, have to stop there--might add a word or two-- but on Thursday we turn, I'm afraid with a certain awkwardness; I wish there were an intervening weekend, to Freud and Peter Brooks.

好的，必须在此停下了，再加一两句-,到周四我们将会，恐怕有点尴尬;,我希望会有一个周末，留给弗洛伊德和彼得，布鲁克斯。

耶鲁公开课 - 文学理论导论课程节选

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'm going for an operation in July and that's my lot I'm afraid.

BBC: SPORT | Cricket | Counties | Essex | Injury forces Irani's retirement

Then Anthea cried out, 'I'm not afraid.

NPR: Excerpt: 'Five Children and It'

" Says Columbia University's Alan Tall, "Even after reading it, I'm afraid I'm a bit confused.

FORBES: Fuzzy Drug Company Math