sad的副词是什么

　　She looked sad and tired.

　　她看上去又伤心又疲惫。

　　We are very sad to hear that you are leaving.

　　听说你要走了，我们十分难过。

　　Your article brought back sad memories for me.

　　你的文章勾起了我悲伤的回忆。

　　How can anyone look sad at an occasion like this?

　　在像这样的一个场合怎么会有人看上去悲伤呢？

　　I was very sad indeed to hear of your father's death.

　　听到令尊大人去世，我感到非常难过。