比较级： sadder
最高级： saddest
易混淆的单词： SadSAdSAD

But her much lighter weight made me sad .

她消瘦而单薄的身子让我又难过万分。

This was a very sad day for me .

这对我来说是极其悲伤的一天。

Eg. john is sad because his dog has died .

约翰因为自己的狗死了非常伤心。

But , that would be a sad situation .

但是，那将会是一种很可悲的境地。

The sad truth is that he probably never needed to .

悲哀的事实是，他可能从来都不需要提这样的要求。