1
prolong + noun
直接宾语，表示延长某事物。
The medicine can prolong your life.
这种药可以延长你的寿命。
延长；拖长
prolonging — present participle of prolong
先理解核心含义，再看它在真实句子里的用法。
延长；拖长
to make something last longer or continue for more time
The medicine can prolong your life.
这种药可以延长你的寿命。
在空间或长度上延伸
To extend in space or length.
延长；延长持续时间
To lengthen in time; to extend the duration of.
推迟到较远的时间；延期。
To put off to a distant time; to postpone.
变长；延长。
To become longer; lengthen.
prolong
Base
原形
prolongs
3rd person
第三人称单数
prolonging
-ing
现在分词
prolonged
Past
过去式
prolonged
Past participle
过去分词
The meeting has been prolonged by another hour.
会议被延长了一个小时。
They were prolonging their vacation in Europe.
他们当时正在延长他们在欧洲的假期。
规则动词，过去式和过去分词加-ed
The meeting was prolonged because of the heated debate.
由于激烈的辩论，会议被延长了。
He took a break to avoid prolonging his headache.
他休息了一下，以免头痛持续更久。
If you prolong the exposure, the photo will become overexposed.
如果你延长曝光时间，照片会变得过度曝光。
直接宾语，表示延长某事物。
The medicine can prolong your life.
这种药可以延长你的寿命。
用by短语表示延长的具体时长。
They prolonged the meeting by an hour.
他们将会议延长了一个小时。
被动结构，表示某事被延长。
The event was prolonged due to bad weather.
由于天气恶劣，活动被延长了。
Not this
The meeting prolonged for two hours.
Use this
The meeting was prolonged for two hours.
prolong 是及物动词，必须接宾语或用被动语态；不能像不及物动词那样直接使用。
Not this
We need to prolong the time of the meeting.
Use this
We need to prolong the meeting.
prolong 本身已包含“时间延长”的意思，无需再加“the time”，否则造成冗余。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
延长寿命
Regular exercise and a healthy diet can help prolong life.
定期锻炼和健康饮食有助于延长寿命。
延长痛苦
The doctors decided not to prolong the agony and let the patient go peacefully.
医生决定不延长痛苦，让病人平静地离去。
延长谈判
Both sides agreed not to prolong negotiations unnecessarily.
双方同意不必要地延长谈判。
延长停留
We decided to prolong our stay in Paris for another week.
我们决定在巴黎再延长停留一周。
延长持续时间
The medication may prolong the duration of the treatment.
这种药物可能会延长治疗的持续时间。
延长战争
The lack of a peace agreement only serves to prolong the war.
缺乏和平协议只会延长战争。
延长痛苦（指拖延不愉快或紧张的过程）
The judge decided not to prolong the agony and delivered the verdict immediately.
法官决定不再延长痛苦，立即宣布了判决。
拖延不可避免的事情
By avoiding the discussion, he was only prolonging the inevitable.
他回避讨论，只是在拖延不可避免的事。
延长悬念
The director prolonged the suspense by switching to a different scene.
导演通过切换到另一个场景来延长悬念。
Use prolonging naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
记住“pro”像“前”，“long”是“长”，往前拉长就是“延长”的意思。
语域：formal 常见场景：正式书面语、学术/科技语境 prolong 通常用于正式或书面语境，表示‘延长’时间或过程。在医学、法律等专业领域也较常见。
及物动词，后需接宾语。
Dictionary facts from ECDICT, OCTANOVE, WIKTIONARY, WORDNET.