她对我说的话感到非常沮丧，我感到很内疚。

She was so upset about what I'd said and I felt so ___guilty.

我因为把她独自留在那里而感到内疚。

I felt ___guilty about leaving her there on her own.

我因为忘记说再见而感到良心不安。

I've got a ___guilty conscience because I forgot to say goodbye.