1. be in on it : 熟悉内情；
2. be in for it : 势必倒霉；
3. be in for : 必定遭到, 参加；
4. in and out : 进进出出；
副词
1. Please come in.
请进。
2. I called on him; but he wasn\'t in.
我去拜访他，但他不在家。
介词
1. In which direction did he go?
他朝哪个方向去了？
2. There is a pencil in the box.
匣子里有一枝铅笔。
3.
3. One child in twenty has this disease.
二十个小阿中有一个患有这种疾病。
结婚纪念日
A：When is your parents’ wedding anniversary?
你父母的结婚纪念日是在哪天？
B：Their anniversary is in August.
他们的结婚纪念日是在八月。
方位;移动（POSITION OR MOVEMENT）
1. 在…里;在…之内
Someone or something that is in something else is enclosed by it or surrounded by it. If you put something in a container, you move it so that it is enclosed by the container.
e.g. He was in his car.
他坐在他的车里。
e.g. ...clothes hanging in the wardrobe...
挂在衣柜里的衣服
2. 在(某处)
If something happens in a place, it happens there.
e.g. We spent a few days in a hotel...
我们在一家宾馆住了几天。
e.g. He had intended to take a holiday in America...
他本打算去美国度假。
3. 在家;在办公室
If you are in, you are present at your home or place of work.
e.g. My flatmate was in at the time...
我的舍友当时在房间里。
e.g. He has had to be in every day.
他每天都得坐班。
4. 进;入
When someone comes in, they enter a room or building.
e.g. She looked up anxiously as he came in...
他进来的时候,她焦虑不安地抬起头来看了看。
e.g. They shook hands and went in.
他们握了手,走了进去。
5. (火车)进站;(轮船、飞机)抵港
If a train, boat, or plane has come in or is in, it has arrived at a station, port, or airport.
in的意思
e.g. We\'d be watching every plane coming in from Melbourne...
我们会密切注意从墨尔本飞来的每架飞机。
e.g. Look. The train\'s in. We\'ll have to run for it now.
看,火车进站了,我们现在得赶紧朝那边跑了。
6. (潮)在上涨
When the sea or tide comes in, the sea moves towards the shore rather than away from it.
in
e.g. She thought of the tide rushing in, covering the wet sand...
她想象潮汐涌来,淹没潮湿的沙滩。
e.g. If the tide was in they went swimming.
如果涨潮了,他们就去游泳。
7. 在(橱窗)里面
Something that is in a window, especially a shop window, is just behind the window so that you can see it from outside.
e.g. The light in the window went out...
橱窗里的灯熄灭了。
e.g. There was a camera for sale in the window.
橱窗里有一架相机待售。
8. 在(镜子)之中
When you see something in a mirror, the mirror shows an image of it.
e.g. I couldn\'t bear to see my reflection in the mirror...
我不忍看镜子里自己的样子。
e.g. He caught sight of his hair in a mirror.
他从镜子里看见了自己的头发。
9. 穿着;戴着
If you are dressed in a piece of clothing, you are wearing it.
e.g. He was a big man, smartly dressed in a suit and tie.
他身材高大，穿着西服打着领带，非常帅气。
e.g. ...three women in black.
3 个黑衣女子
10. (包裹)在…之中;(覆盖)在…之下
Something that is covered or wrapped in something else has that thing over or round its surface.
in的解释
e.g. His legs were covered in mud.
他的腿上满是泥浆。
e.g. ...carrots wrapped in newspaper.
包在报纸里的胡萝卜
11. (裂缝或洞)在…表面上
If there is something such as a crack or hole in something, there is a crack or hole on its surface.
e.g. There was a deep crack in the ceiling above him.
在他头顶的天花板上有一道很深的裂缝。
e.g. ...an unsightly hole in the garden.
花园里一个很不雅观的洞
方位;移动（POSITION OR MOVEMENT）
1. 在…里;在…之内
Someone or something that is in something else is enclosed by it or surrounded by it. If you put something in a container, you move it so that it is enclosed by the container.
e.g. He was in his car.
他坐在他的车里。
e.g. ...clothes hanging in the wardrobe...
挂在衣柜里的衣服
2. 在(某处)
If something happens in a place, it happens there.
e.g. We spent a few days in a hotel...
我们在一家宾馆住了几天。
e.g. He had intended to take a holiday in America...
他本打算去美国度假。
3. 在家;在办公室
If you are in, you are present at your home or place of work.
e.g. My flatmate was in at the time...
我的舍友当时在房间里。
e.g. He has had to be in every day.
他每天都得坐班。
4. 进;入
When someone comes in, they enter a room or building.
e.g. She looked up anxiously as he came in...
他进来的时候,她焦虑不安地抬起头来看了看。
e.g. They shook hands and went in.
他们握了手,走了进去。
5. (火车)进站;(轮船、飞机)抵港
If a train, boat, or plane has come in or is in, it has arrived at a station, port, or airport.
in的意思
e.g. We\'d be watching every plane coming in from Melbourne...
我们会密切注意从墨尔本飞来的每架飞机。
e.g. Look. The train\'s in. We\'ll have to run for it now.
看,火车进站了,我们现在得赶紧朝那边跑了。
6. (潮)在上涨
When the sea or tide comes in, the sea moves towards the shore rather than away from it.
in
e.g. She thought of the tide rushing in, covering the wet sand...
她想象潮汐涌来,淹没潮湿的沙滩。
e.g. If the tide was in they went swimming.
如果涨潮了,他们就去游泳。
7. 在(橱窗)里面
Something that is in a window, especially a shop window, is just behind the window so that you can see it from outside.
e.g. The light in the window went out...
橱窗里的灯熄灭了。
e.g. There was a camera for sale in the window.
橱窗里有一架相机待售。
8. 在(镜子)之中
When you see something in a mirror, the mirror shows an image of it.
e.g. I couldn\'t bear to see my reflection in the mirror...
我不忍看镜子里自己的样子。
e.g. He caught sight of his hair in a mirror.
他从镜子里看见了自己的头发。
9. 穿着;戴着
If you are dressed in a piece of clothing, you are wearing it.
e.g. He was a big man, smartly dressed in a suit and tie.
他身材高大，穿着西服打着领带，非常帅气。
e.g. ...three women in black.
3 个黑衣女子
10. (包裹)在…之中;(覆盖)在…之下
Something that is covered or wrapped in something else has that thing over or round its surface.
in的解释
e.g. His legs were covered in mud.
他的腿上满是泥浆。
e.g. ...carrots wrapped in newspaper.
包在报纸里的胡萝卜
11. (裂缝或洞)在…表面上
If there is something such as a crack or hole in something, there is a crack or hole on its surface.
e.g. There was a deep crack in the ceiling above him.
在他头顶的天花板上有一道很深的裂缝。
e.g. ...an unsightly hole in the garden.
花园里一个很不雅观的洞
