The boy was very sad.

男孩非常伤心。

I'm excited, and also sad.

我很兴奋，也很难过。

I like movies that are sad.

我喜欢悲伤的电影。

Help a friend who's very sad.

帮助一个非常伤心的朋友。

Dino the dinosaur was very sad.

恐龙迪诺非常难过。

She makes me laugh when I'm sad.

当我难过时，她让我笑。

Yes, I am, but I feel a bit sad.

是的，但我有点难过。

He keeps to himself, grumpy and sad.

他独自一人，脾气暴躁且悲伤。

My classmates and I are all a bit sad.

我的同学和我都有点难过。

The other two men feel ashamed and sad.

另外两个人感到羞愧和难过。