a lurk
lurk 作名词时可数，用不定冠词 a 表示“一次潜伏（行为）”。
The guard noticed a lurk in the shadows by the wall.
警卫注意到墙边暗处有一次潜伏。
潜伏；潜藏
lurks — plural of lurk
潜伏行为；潜行
名词用法较少见，通常作动词使用。
潜伏行为
The act of lurking.
After a long lurk behind the bushes, the cat finally sprang at the bird.
在灌木丛后长时间潜伏后，猫终于扑向那只鸟。
用法提示：lurk 作单数名词，与 a 连用，表示“潜伏行为”。
The detective's short lurk outside the shop was enough to spot the suspect.
侦探在商店外短暂的潜伏足以发现嫌疑人。
用法提示：lurk 作名词，由所有格修饰，表示一次潜伏。
Several brief lurks around the parking lot helped them learn the guard's routine.
在停车场周围几次短暂的潜伏帮助他们了解了警卫的作息。
用法提示：lurks 是 lurk 的复数形式，表示多次潜伏行为。
lurk 作名词时可数，用不定冠词 a 表示“一次潜伏（行为）”。
The guard noticed a lurk in the shadows by the wall.
警卫注意到墙边暗处有一次潜伏。
复数形式 lurks 指多次、多处的潜伏行为，常与 several、many 等数量词连用。
Several lurks were reported near the border.
边境附近报告了数次潜伏。
grammar · medium
易错句子We counted five lurk in the video.
正确表达We counted five lurks in the video.
lurk 是可数名词，词典给出的复数形式是 lurks；基数词 five 后面必须接复数名词，所以不能用原形 lurk。汉语名词没有单复数变化，学习者容易漏掉词尾 -s。
grammar · medium
易错句子The guide described lurk as a patient wait for prey.
正确表达The guide described a lurk as a patient wait for prey.
lurk 作可数名词单数泛指“一次潜伏行为”时，前面要加不定冠词 a；汉语没有冠词，学习者容易在 describe 的宾语位置直接光用名词原形，从而漏掉 a。
grammar · medium
易错句子The lurks of the young tiger was caught on camera.
正确表达The lurks of the young tiger were caught on camera.
主语 The lurks 是复数，谓语 be 动词必须用 were；汉语动词没有单复数一致，学习者常按单数写成 was。数的一致由主语 lurks 决定，与后面的 of the young tiger 无关。
伺机而动；暗中搜寻下手目标
The gang was on the lurk for an easy target.
这伙人正伺机寻找容易下手的目标。
潜水模式；只看不发言的状态
He stayed in lurk mode all afternoon, reading the forum but posting nothing.
他整个下午都处于潜水模式，只看论坛不发帖。
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