我当然很抱歉，但我怎么知道你在抽屉里呢？

Of course I'm very sorry, but how could I know you were in the drawer?

youdao

我很抱歉让你流口水了，但你知道，这是五个新金币。

I am very sorry to make your mouth water, but these, as you know, are five new gold pieces.

youdao

我很抱歉–我不知道你是那样想的。

I'm so sorry – I had no idea you felt that way.

《柯林斯英汉双解大词典》

Well, I'm sorry. I thought you knew.

很抱歉，我以为你早就知道了。

I'm sorry 实战 - SpeakingMax英语口语达人

I'm sorry. I thought you knew.

很抱歉，我以为你早就知道了。

I'm sorry 实战 - SpeakingMax英语口语达人