1
overrun sth
作“攻占”解时，overrun 是及物动词，直接接地点或目标。
The army overran the enemy's positions.
军队攻占了敌人的阵地。
超时；超出预定时间
overrunning — present participle of overrun
先理解核心含义，再看它在真实句子里的用法。
超时；超出预定时间
To continue for too long, especially a meeting or event exceeding its scheduled time.
The army overran the enemy's positions.
军队攻占了敌人的阵地。
常指会议、节目等超过预计时间
大批涌入并彻底占领
To defeat an enemy and invade in great numbers, seizing the enemy positions conclusively.
泛滥；大批出没
To infest, swarm over, flow over.
跑过；超出
To run past; to run beyond.
延续过久；超时
To continue for too long.
overrun
Base
原形
overruns
3rd person
第三人称单数
overrunning
-ing
现在分词
overran
Past
过去式
overrun
Past participle
过去分词
The river overruns its banks every spring.
这条河每年春天都会泛滥。
The enemy overran the fort last night.
敌人昨晚占领了那个堡垒。
The weeds have overrun the garden.
杂草已经蔓延到整个花园。
不规则动词
The project overran its budget by 20%.
该项目超出预算20%。
The stadium was overrun with fans after the match.
赛后体育场挤满了球迷。
The meeting always overruns its scheduled time.
会议总是超出预定时间。
作“攻占”解时，overrun 是及物动词，直接接地点或目标。
The army overran the enemy's positions.
军队攻占了敌人的阵地。
此义常用于被动结构，表示“被某物大量侵扰或遍布”。
The kitchen was overrun with ants.
厨房里爬满了蚂蚁。
表示“超时”时可单独使用，后接 by 加具体时长。
The meeting overran by ten minutes.
会议超出了预定时间十分钟。
Not this
The meeting has overran.
Use this
The meeting has overrun.
overrun的原形、过去式和过去分词形式相同；overran只是一般过去时，不能用于完成时。
Not this
The meeting was overrun by 20 minutes.
Use this
The meeting overran by 20 minutes.
overrun表示“超时”（continue for too long）时是不及物动词，应用主动语态；被动语态通常表示被占领或充满，不符合超时的意思。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
被（害虫、杂草等）大量侵扰；布满
The garden is overrun with weeds.
花园里杂草丛生。
攻占（某国）；占领（某国）
The rebel army quickly overran the capital.
叛军很快攻占了首都。
（河水）漫过河岸；泛滥
The river overran its banks after the heavy rain.
大雨过后，河水漫过了河岸。
超出预算
The project overran its budget by $10,000.
这个项目超出了预算1万美元。
超过规定时间；超时
The meeting overran the allotted time by fifteen minutes.
会议超过了规定时间15分钟。
被……遍布；满是……
The small town was overrun with tourists during the festival.
节日期间，这个小镇挤满了游客。
Use overrunning naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想：over（越过）+run（跑），跑过了头——时间超时、敌人攻占、水漫泛滥，都像‘跑过头’。
语域：mixed 常见场景：meetings and schedules、military reports、pest or weed problems overrun 在不同搭配中语域不同：表示“超时”（如会议、节目）时比较中性、常用；表示“占领”或“蔓延”时多用于书面或正式描述。建议根据具体搭配选择。
及物和不及物动词。常用被动语态，后接with或by表示‘充满’或‘被侵占’。
Dictionary facts from ECDICT, WIKTIONARY, WORDNET.