1
sag
不及物用法，表示物体因失去支撑或压力而自然下垂或下沉。
The mattress sagged over time.
床垫随时间推移而凹陷。
下垂；下沉
sagging — present participle of sag
先理解核心含义，再看它在真实句子里的用法。
下垂；下沉
To sink or droop in the middle under weight or pressure.
The mattress sagged over time.
床垫随时间推移而凹陷。
因自身重量或所受压力而在中间下沉至水平线或平面以下。
To sink, in the middle, by its weight or under applied pressure, below a horizontal line or plane.
从直立位置倾斜、下陷或沉降。
To lean, give way, or settle from a vertical position.
失去坚固、弹性、活力或兴盛状态；下沉、下垂、萎靡、弯曲；在忧虑、烦恼、疑虑等压力下(心灵或精神)屈服；变得不稳定或失衡。
To lose firmness, elasticity, vigor, or a thriving state; to sink; to droop; to flag; to bend; to yield, as the mind or spirits, under the pressure of care, trouble, doubt, or the like; to be unsettled or unbalanced.
走路时闲逛；慢吞吞地走；沉重地拖曳或下垂。
To loiter in walking; to idle along; to drag or droop heavily.
sag
Base
原形
sags
3rd person
第三人称单数
sagging
-ing
现在分词
sagged
Past
过去式
sagged
Past participle
过去分词
The shelf sags under the weight of books.
书架在书籍的重量下下垂。
Her spirits sagged after hearing the bad news.
听到坏消息后，她的情绪低落了。
The economy is sagging due to the crisis.
经济因危机而萧条。
规则动词，过去式和过去分词加-ed。
The old mattress sagged in the middle from years of use.
旧床垫因多年使用而中间下垂。
The shelf is sagging under the weight of too many books.
书架因书太多而正在下弯。
Heavy loads have sagged the suspension over time.
重物长时间使悬挂系统下垂。
不及物用法，表示物体因失去支撑或压力而自然下垂或下沉。
The mattress sagged over time.
床垫随时间推移而凹陷。
及物用法，表示使某物下垂。
The excessive weight sagged the rope.
过重的重量使绳子下垂。
常用介词under表示承受压力，with表示伴随原因。
The branches sagged under the heavy fruit.
树枝被沉重的果实压弯了。
Not this
The rope saged under the heavy load.
Use this
The rope sagged under the heavy load.
动词'sag'的过去式需要双写末尾的'g'再加'-ed'，不能只加'-d'。
Not this
She sagged herself onto the couch.
Use this
She sagged onto the couch.
'sag'表示身体下垂时通常是不及物动词，不需要接反身代词'herself'。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
在……的重压下下陷
The old bed sagged under the weight of two adults.
那张旧床在两个成年人的重压下塌了下去。
疲软的经济
The sagging economy has led to widespread job losses.
疲软的经济导致了大规模失业。
低落的情绪
A cup of hot tea lifted her sagging spirits.
一杯热茶让她低落的情绪振作了起来。
松弛的皮肤
This cream claims to firm sagging skin.
这款面霜声称能使松弛的皮肤变得紧致。
中间下垂
The bookshelf sagged in the middle under the heavy books.
那个书架在沉重的书的重压下中间下垂了。
下滑的销售额
The company introduced discounts to boost sagging sales.
公司推出折扣以提振下滑的销售额。
Use sagging naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
sag 的字母 s 像一条中间弯下去的弧线，再看 g 像垂下的钩子，联想重物压得中间下垂、下沉。
语域：neutral 常见场景：日常对话、建筑或物体描述、商业或经济报道、情绪或精神描写 sag 作动词时通常没有强烈的正式或非正式倾向，属于中性用词。日常口语中常用来描述物体下垂或人精神不振，在技术或书面描述（如建筑下沉、经济下滑）中也较常见。
这些词都以 /æɡ/ 音结尾，与 sag 押韵：bag、tag、rag、wag、drag、flag。注意不要被形近词误导：sage 读 /seɪdʒ/，saga 读 /ˈsɑːɡə/，发音不同。
Dictionary facts from ECDICT, WIKTIONARY.