I 'm afraid I can' t agree.

恐怕我不能同意。

youdao

I "m afraid I can" t.

恐怕我不行。

youdao

"I" m afraid I can "t answer that question," I said.

“我恐怕不能回答这个问题，”我说道。

youdao

I'm afraid I can't quite accept that.

恐怕我无法接受这种观点。

普林斯顿公开课 - 人性课程节选

You can say "I'm afraid of the dark."

你可以说，“I'm afraid of the dark.”

I'm afraid of 课堂 - SpeakingMax英语口语达人

I'm afraid I can't let some extreme and unfounded comments go unchallenged.

BBC: Is Marion Jones right to drop coach?

"I'm afraid I can't say more, " he teases.

FORBES: Three men and a Web idea

I'm afraid I can't do that.

NPR: Space Race Permeated Pop Culture