in作为介词，有哪些意思

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.
电话在一楼搭野的小书房内。
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.
他消枝拿将于一周之后回来。
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拿搭的领袖人物。
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

a friend in me
a friend in need
in the room
in the same class
He is lacking in courage.
He is dressed in black
in the opposite direction
They paid in cash
I haven't met her in a long time.
.The room was in disorder.
One child in twenty has this disease.
In him I see a future leader.
The work is in progress.
He pushed a button and set the machine in motion.