in的意思和用法（最好有例句）

in
介词 prep.
1.在...里,在...上
The two brothers study in the same class.
两兄弟在同一个班里上课.
The telephone is in the little study on the ground floor.
电话在一楼的小书房内.
2.在...之内;在...方面
He is lacking in courage.
他缺乏勇气.
3.从事于;参加着
She is in business.
她做生意.
4.穿着,戴着
He is dressed in black.
他穿黑衣服.
5.朝,向
She hurried away in the opposite direction.
她朝相反的方向匆匆离去.
6.(表示手段、方法、材料)用,以
They paid in cash.
他们用现金支付.
7.在...期间;在...以后
He'll come back in a week.
他将于一周之后回来.
I haven't met her in a long time.
我好长时间没有遇见她了.
8.处在...中
The room was in disorder.
房间里乱七八糟.
9.(表示数量、程度、比例)按,以;在...中
One child in twenty has this disease.
二十个小孩中有一个患有这种疾病.
10.在...身上,在...上
In him I see a future leader.
我在他身上看到了一个未来的领袖人物.
11.(表示过程)在...当儿;在...过程中
The work is in progress.
这工作正在进行中.
12.(表示动作的方向和结果)进入到...中;成,为
He pushed a button and set the machine in motion.
他按下按钮开动了机器.
副词 ad.
1.进;在里头
Please come in.
请进.
2.在屋里;在家
I called on him; but he wasn't in.
我去拜访他,但他不在家.
3.(车、船、季节等)已到达,已来临
Spring is in at last.
春天终于来了.
4.(庄稼)已收进;已成熟
The wheat crop is in.
小麦收进来了.
5.(服装等)时髦
Miniskirts are in again.
迷你裙又时髦起来了.
6.当政;当选
The Democratic Party is in.
*党执政了.
7.【板】轮到击球,【网】(球)在界内
8.(加)入,(搀)入
形容词 a.
1.在里面的;朝里面的[B]
I found the letter in my tray.
我在文件盘里发现了这封信.
2.【口】时髦的,流行的;赶时髦的[B]
These clothes are the `in' thing now in Los Angeles.
这些衣服在洛杉矶正流行.
the in crowd
赶时髦的一群
This is the in thing to wear this season.
这是这一季最流行的穿着.
She mixed with the in crowd.
她与时髦阶层交往.
3.【口】限于小圈子的[B]
It was an in joke.
这是小圈子里的一个玩笑.
4.(火等)燃烧着的;(灯)亮着的[F]
名词 n.
1.当朝派;执政者[P1]
2.【美】【口】门路,关系[C]