sad没有动词及动词过去式。

Proud people breed sad sorrows for themselves .
骄傲的人给自己招来悲哀。

He sobbed out the whole sad story .
他哽咽着叙说这个悲惨的故事。

The sad story touched his heart .
那个悲惨的故事触动了他的心弦。

He felt deeply grieved at this sad news .
他听到这个不幸的消息。

One gets tired of sad happenings .
种种不幸的遭遇使得人厌烦了。

What i saw made me very sad .
我所目睹的一切使我感到非常难过。

It was grave; it was sad and comic .
它是坟墓，既悲惨又滑稽。

It was very sad to see the tradition die .
看到这个惯例取消，感到非常悲伤。

I was not always so sad and slow .
我原来并不象现在这样萎靡不振，动作迟缓。

He was conscious of life, and a little sad .
他有生活意识，同时又有点悲哀。