I'm feeling very guilty— I've been meaning to call my parents for days, but still haven't got around to it.

我感到非常内疚—几天来我一直打算给父母打电话，但还是没抽出时间打。

《牛津词典》

I lied to my parents and now I feel very guilty.

我骗了我父母，现在感到很内疚。

youdao

If one of 60, 000 has an accident, you feel very guilty.

如果60000事物中有一件是事故，你就会感到内疚。

youdao

Of the eight, only one was found guilty, and only in a very limited way.

VOA: special.2010.06.03

If found guilty, BAE may face huge charges but lawyers say the case may be very difficult to prove.

VOA: standard.2009.10.01

And I was always - in those times I was feeling very guilty that I wasn't doing the project.

NPR: Making Peace With The Bible By Writing It Out Word For Word

We had escaped, and we felt very guilty about it.

NEWYORKER: Raj, Bohemian

This measured, among other things, feelings of guilt on a scale from one (very slightly guilty or not at all) to five (extremely guilty).

ECONOMIST: Religion got it right: pain seems to assuage guilt