I'm afraid not.

恐怕不行。

youdao

Usher: Sorry, but I'm afraid not.

招待员：对不起，恐怕不行。

youdao

"Have you found Paula?"—"I'm afraid not, Kate."

“你找到葆拉了吗？”—“恐怕还没有，凯特。”

《柯林斯英汉双解大词典》

"I'm not afraid of you.

VOA: special.2010.01.20

I think part of the message here is that... I want to mention just one more, I'm afraid we're out of time But believe it or not, I could talk to you for another 24 hours.

我觉得需要传达的信息是。。。,我想要再次重复一遍，我担心时间不够了,信不信由你，我可以跟你再聊,24个小时。

普林斯顿公开课 - 人性课程节选

No.Not my cup of tea,I'm afraid." There is also a view that conventional graveyards help to preserve history and display the spirit of a community.

VOA: standard.2010.07.22

I'm not afraid and I'm not threatened.

NPR: Amputee Wounded in Iraq to Return to Active Duty

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

NPR: Excerpt: 'Five Children and It'

I'm always, you know, I'm not afraid of that.

NPR: 'Viva': Diego Urcola and His Dream Band