You'd have to be sad to wear a shirt like that.
你穿著那樣的襯衣顯得老氣。
I was very sad indeed to hear of your father's death.
聽到令尊大人去世，我感到非常難過。
How sad that all his hard work should come to nothing.
他的所有辛勤勞動竟全部付諸東流，太讓人傷心了。
The increase in crime is a sad reflection on our society today.
犯罪的增加令人遺憾地反映了當今社會不太好的一面。
It's a sad fact that many of those killed were children.
讓人難以接受的是遇難者中很多是孩子。
It was sad to see them go.
看著他們離去，真讓人難過。