in
例子
They live in a big house.
他们住在一个大房子里。
The keys are in my backpack.
钥匙在我的背包里。
02
在, 于
used to show when something happens within a particular time frame
例子
The flowers bloom in spring.
花在春天开放。
I was born in September.
我出生在九月。
03
在, 里
used to indicate being in a particular situation, mood, or physical state
例子
She was in tears after hearing the news.
听到这个消息后，她泪流满面。
The town is in ruins after the storm.
风暴过后，小镇处于废墟之中。
例子
He winced in pain after the fall.
跌倒后，他痛得得皱起了脸。
They cried in joy at the surprise.
他们因惊喜而高兴得哭了。
05
在, 于
used to indicate a particular characteristic being measured, judged, or noticed
例子
They are similar in tone but not in content.
它们在语气上相似，但在内容上不相似。
He 's weak in math but excels in writing.
他在数学方面很弱，但在写作方面很出色。
06
在, 里
used to indicate that something or someone is part of a particular group, place, or thing
例子
She is the only woman in the board of directors.
她是董事会中唯一的女性。
John is the newest member in our team.
约翰是我们团队中最新的成员。
07
在, 于
used to indicate someone's participation in a profession, industry, or institution
例子
She 's in advertising and works with big brands.
她在广告行业工作，与大品牌合作。
He 's in law school, hoping to become a prosecutor.
他在法学院，希望成为一名检察官。
08
用, 在
used to indicate the language or means of communication
例子
The book is written in English.
这本书是用英语写的。
Please submit the form in ink.
请用墨水提交表格。
09
在...中，在...里
used to indicate the context or sphere within which the action is taking place
例子
In managing a team, effective communication is crucial.
在管理团队时，有效的沟通至关重要。
In conducting scientific research, accuracy and reproducibility must be prioritized.
在进行科学研究时，必须优先考虑准确性和可重复性。
9.1
理论上, 从理论上讲
used to express a perspective, opinion, or limited scope
例子
In theory, it should work.
在理论上，它应该可以工作。
He was confident in his own judgment.
他对自己的判断有信心。
10
在
used to describe the relationship between one part and the whole
例子
One in five voters supported the measure.
五分之一的选民支持这一措施。
Three in ten homes now use solar panels.
现在十分之三的家庭使用太阳能板。
11
在, 里面
used to indicate spatial organization or structure
例子
The chairs are placed in a circle.
椅子被摆放成一个圆圈。
The kids stood in rows for the photo.
孩子们排成几排拍照。
12
穿着, 戴着
used to refer to clothing or uniforms someone is wearing
例子
He arrived in a sharp black suit.
他穿着一件锋利的黑色西装到达。
They marched in full uniform.
他们穿着全套制服行进。
13
在, 里
used to indicate something sensed, heard, or seen
例子
He confessed in my hearing.
他在我听到的时候里坦白了。
The ships were in view as we approached the harbor.
当我们接近港口时，船只在视线之内。
14
在, 里
used to describe something as part of a person's or thing's natural character or capacity
例子
He has it in him to lead.
他有领导能力在他身上。
I knew you had it in you to succeed.
我知道你内心有成功的能力。
in
例子
She stepped in from the rain and shook off her umbrella.
她从雨中走进来，抖了抖她的伞。
They walked in through the front door.
他们从前门走进来。
1.1
在里面, 内部
used to indicate being situated or surrounded within a space or enclosure
例子
We were locked in for the night.
我们被锁在里面过夜。
The kids stayed in while the storm passed.
孩子们在暴风雨过去时呆在里面。
02
到达, 进入
used to express reaching a place, especially in reference to transport or scheduled events
例子
Her flight got in just after midnight.
她的航班刚过午夜就到达了。
The shipment came in late this afternoon.
货物今天下午晚些时候到了。
03
里面, 进入
to be placed or merged into a system, structure, or composition
例子
Fold the berries in gently at the end.
最后轻轻地将浆果折叠进去。
She pasted the final photo in before submitting the scrapbook.
在提交剪贴簿之前，她把最后的照片贴进去了。
04
向内, 向海岸
used to refer to moving inland or to the shoreline
例子
We set up camp before the tide came in.
我们在潮水向内涌来之前搭好了营地。
The waves rolled in, covering the rocks one by one.
波浪向内翻滚，一块一块地覆盖岩石。
05
内, 近
(in baseball) used to describe defensive positioning closer to the batter
例子
The outfield was playing in for the final out.
外野手为了最后一个出局而内收防守。
With a runner on third, the infield came in.
三垒有跑者时，内野向前靠近。
5.1
向内, 里面
(of a pitch) used to describe a ball thrown near the inside part of the plate
例子
He threw a fastball in to jam the hitter.
他投了一个快球内角来挤打击者。
That curveball broke sharply in.
那个曲球急剧地向内弯曲。
06
在里面, 参与
used to indicate taking part in or having access to something, often privately, commonly followed by "on"
例子
He's in on the plan to restructure the team.
他参与了团队重组的计划。
Were you in on the surprise?
你参与了这个惊喜吗？
07
关系好, 受宠
in a favorable or friendly relationship with someone
例子
Ever since the project started, she 's been in with the senior managers.
自从项目开始以来，她就与高级经理们关系很好。
He tried to get in with the popular group by buying everyone coffee.
他试图通过给每个人买咖啡来与受欢迎的小组搞好关系。
7.1
在, 里
in a particular type of connection or status, often used in idiomatic expressions
例子
She's clearly in bad with her neighbors after the noise complaints.
在噪音投诉之后，她显然与邻居关系不好。
He's in deep with that investor group, financially and personally.
他在财务和个人方面都与那个投资者集团有深入的关联。
08
生产中, 活跃
(of oil well) actively producing oil
例子
That new well is finally in.
那口新井终于投产了。
The site will be in by next quarter.
该站点将在下个季度投入生产。
09
逐渐地, 慢慢地
used to indicate becoming noticeable or clearly perceived
例子
The music faded in slowly.
音乐逐渐变得清晰可闻。
Her image came in through the fog.
她的形象从雾中显现出来。
10
当选, 就职
(in politics) used to refer to gaining official power or being voted into a role
例子
She was voted in as president.
她被投票选为总统。
The new mayor came in last week.
新市长上周上任了。
in
例子
Bright neon colors are definitely in this season.
明亮的霓虹色绝对是这个季节的流行。
That hairstyle is n't in anymore.
那种发型已经不流行了。
例子
The doctor is in today.
医生今天在。
Is Mr. Thomas in, or should I call back later?
托马斯先生在吗，还是我应该稍后再打来？
03
时髦的, 流行的
belonging to or identified with a socially exclusive, trendy group
例子
Only the in crowd got invited to the private screening.
只有in人群被邀请参加私人放映。
He 's always been part of the in group at school.
他在学校里一直是in团体的一员。
例子
The in part of the ring has a secret engraving.
戒指的内部部分有一个秘密雕刻。
You'll find the sensor in the in compartment.
您会在隔间里找到传感器。
05
界内, 有效
(of a ball in sports) having landed or remained inside the boundaries of play
例子
The referee called it in, but the other team challenged.
裁判称其为界内，但对方球队提出质疑。
From my angle, that serve was clearly in.
从我的角度看，那次发球明显在界内。
例子
The in party is facing criticism for rising inflation.
执政党因通货膨胀上升而面临批评。
The in administration proposed a tax reform bill.
现任政府提出了一项税改法案。
例子
The in train arrived on time.
进火车准时到达。
They waited for the in tide to reach the shore.
他们等待涨潮到达岸边。
08
可用的, 已到达
having arrived, reported, or been finalized
例子
The results are finally in.
结果终于出来了。
All the applications are in now.
所有的申请现在都已经提交了。
09
盈利的, 赚钱的
having gained or made money by a specific amount
Informal例子
He's in a couple thousand dollars from crypto.
他通过加密货币赚了几千美元。
They're in twenty percent over their initial investment.
他们比初始投资多了百分之二十。
Informal例子
That was definitely an in joke, they all laughed except me.
那绝对是一个内部笑话，除了我他们都笑了。
His comment was full of in references.
他的评论充满了in的引用。
11
在, 里面
having reached a specified amount or point in time, money, consumption, etc.
例子
I'm already two hours in and barely halfway through.
我已经投入两个小时了，才完成了一半。
We were ten miles in before we saw a sign.
我们看到标志之前已经进入了十英里。
12
愿意, 准备好
willing, ready, or on board to participate in something
Slang例子
I'm in for taking on this project.
我愿意接手这个项目。
She's in to lead the client presentation.
她愿意领导客户演示。
In
01
内部人士, 掌权者
a person who currently holds a position of power, influence, or insider status
Informal例子
The voters were tired of the ins and wanted a complete change in leadership.
选民对内部人士感到厌倦，希望领导层彻底改变。
During the debate, the out challenged the policies of the in.
在辩论期间，局外人挑战了局内人的政策。
in-
01
不, 伊姆
used to indicate negation or absence
例子
The results were incomplete, so the study had to continue.
结果不完整，因此研究不得不继续。
Her response was insincere, which made him doubt her apology.
她的回应不真诚，这让他对她的道歉产生了怀疑。
02
进-, 入-
used to express movement inward or involvement
例子
The spy was trained to infiltrate enemy territory.
间谍被训练潜入敌方领土。
They worked to incorporate new methods into the system.
他们努力将新方法纳入系统中。
