It was sad to see them go.
看著他們離去，真讓人難過(guò)。
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(tīng)到令尊大人去世，我感到非常難過(guò)。
We are very sad to hear that you are leaving.
聽(tīng)說(shuō)你要走了，我們十分難過(guò)。
Her moods kept changing ─ now happy, now sad.
她的情緒總是變幻不定——時(shí)而歡喜，時(shí)而憂傷。