1
be sheathed in/with sth
覆盖义多用被动语态；主动式也可说 sheathe sth with/in sth，但不如被动常见。
The ship's hull is sheathed in copper.
船体用铜板包覆。
插入鞘；装鞘
先理解核心含义，再看它在真实句子里的用法。
插入鞘；装鞘
put (a knife, sword, etc.) into a sheath
The ship's hull is sheathed in copper.
船体用铜板包覆。
将(刀剑等)插入鞘中。
To put (something such as a knife or sword) into a sheath.
用保护性覆盖物包裹(某物)。
To encase (something) with a protective covering.
动物将(身体部位,如爪子)缩回体内。
Of an animal: to draw back or retract (a body part) into the body, such as claws into a paw.
sheathe
Base
原形
sheathes
3rd person
第三人称单数
sheathing
-ing
现在分词
sheathed
Past
过去式
sheathed
Past participle
过去分词
She sheathes the knife after each use.
她每次用完刀后都把刀插入鞘中。
He sheathed his sword and walked away.
他把剑插入鞘中，然后走开了。
The workers are sheathing the building's walls with metal panels.
工人们正在用金属板覆盖建筑物的墙壁。
sheathe 常指把刀剑放入鞘中，也可指用保护层覆盖。
After the fencing match, she sheathed her foil and shook hands with her opponent.
击剑比赛结束后，她把花剑插回剑鞘，并与对手握手。
A careful hiker always sheathes his knife before putting it into the backpack.
细心的徒步旅行者总是先把刀插回刀鞘，再放进背包。
She was sheathing the ceremonial dagger when the telephone rang.
电话响起时，她正把礼仪匕首插回鞘中。
覆盖义多用被动语态；主动式也可说 sheathe sth with/in sth，但不如被动常见。
The ship's hull is sheathed in copper.
船体用铜板包覆。
对象通常为刀、剑等刃具，表示“把…插入鞘中”。
He sheathed his knife and walked away.
他收刀入鞘，然后走开了。
此为文学或修辞性用法，表示把利器深深地刺入肉体。
The knight sheathed his dagger in the enemy's chest.
骑士把匕首刺入敌人的胸膛。
Not this
They sheath the swords before the ceremony.
Use this
They sheathe the swords before the ceremony.
sheath 是名词，意为“刀鞘”；表示“把……插入鞘”要用动词 sheathe。这里主语是 They，一般现在时用动词原形 sheathe，不能用名词 sheath。
Not this
The worker sheathed the cable plastic.
Use this
The worker sheathed the cable with plastic.
sheathe 表示“用……包覆/给……加护套”时，需要用介词 with（或 in）引出材料，不能像中文“给电缆包上塑料”那样把材料直接放在宾语后面；所以应在 cable 后加 with。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
把剑插入剑鞘
He sheathed his sword after the duel.
决斗结束后，他把剑插回剑鞘。
收起爪子
The cat sheathed its claws and sat quietly.
那只猫收起爪子，安静地坐着。
用塑料包覆
The wires are sheathed in plastic to prevent electric shocks.
电线用塑料包覆以防触电。
被冰覆盖
The trees were sheathed in ice after the storm.
暴风雪后，树木被冰覆盖。
收剑入鞘；停战，言和
After years of conflict, the two leaders finally agreed to sheathe the sword.
经过多年的冲突，两位领导人终于同意停战言和。
Use sheathe naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
sheathe 由 sheath（鞘）变来，想象刀回鞘的动作：把剑“插回鞘”，也引申为“覆盖、包上护套”。
语域：mixed 常见场景：swords or knives、protective outer coverings sheathe 多用于书面或较正式场合，常指把刀剑插入鞘中，或给物体加上保护性外套；日常口语较少用，更常说 put away 或 cover。
表示“插入鞘”时宾语通常为刀剑；表示“覆盖”时常用被动结构 be sheathed in/with。
Dictionary facts from ECDICT, WIKTIONARY.