1、I have a guilty conscience about forgetting to post your letter
我忘記寄出你的信，為此深感不安。

2、I have a guilty conscience about forgetting to post your letter.
我忘記寄出你的信，為此深感不安。

3、But I am like that kid and have a guilty conscience generally.
而我就像那個小孩一樣，做賊心虛一般。

have a guilty conscience翻譯