Leaving
基本义是离开某地或岗位；也可表示“留下痕迹/便条”（“leaving a note”）。进行时 “is leaving” 常表示即将动身。动名词可用于句首：“Leaving early saves time.”
- “They are leaving for the airport at six.” (他们六点动身去机场。)
- “Leaving the door open let the cool air in.” (门没关让凉风吹了进来。)
- “She apologized for leaving the meeting early.” (她为提早离开会议道歉。)
“Leave” 源自古英语 “lǣfan”（留下、剩下），与表示“剩余、遗产”的语义相关，后扩展出“离去”。
“-ing” 形式用于进行时或名词化；不规则动词原形 “leave” 去 “e” 加 “-ing”。
职场邮件里 “I am leaving the company” 是正式告别；歌曲主题里 “leaving” 常与成长、分手相连。
- 固定搭配: “leaving party” (欢送会), “without leaving a trace” (不留痕迹)
“leave” 像把 leaf（叶子）从枝头拿走——离开的同时也可能留下落叶。
“Leaving the harbor, the ship sounded its horn twice.” (船驶离港口时鸣了两次汽笛。)