darken是一個英語動詞，基本意思是“使變暗，變黑”，引申還可指“憂郁，生氣，不快”。第三人稱單數(shù)：darkens；現(xiàn)在分詞：darkening；過去式：darkened；過去分詞：darkened。

　　例句：

　　1、It was a tragedy that darkened his later life.

　　這場悲劇給他后來的`歲月蒙上了陰影。

　　2、The sky began to darken as the storm approached.

　　暴風(fēng)雨來臨時天空變得黑沉沉的。

　　3、As the day darkened the streetlights came on.

　　天色漸暗，街燈亮了。