prep. 在（某范围或空间内的）某一点； 在（某物的形体或范围）中； 在…内； 在…中； 进入；
adv. 在里面； 在内； 进入； 在家里； 在工作单位；
adj. 流行的； 时髦的；
[例句]He was in his car.
他坐在他的车里。
[其他] 复数：ins
He lived in a small village.他过去住在一个小村子里。
There are many stars in the sky. 空中有很多星星。
He is the tallest boy in the class.他是班里个子最高的男孩。
She is always in a red blouse. 她总是穿着红色衬衫。
in用作形容词时的意思是“时髦的，流行的”。如：
What do you think will be the in colour this year? 你认为今年会流行什么颜色？
She was surprised to find that miniskirts were in again. 她吃惊地发现超短裙又流行了。
Please write in English.请用英语写。
I usually write in ink.我通常用墨水写。
1、时髦的；流行的；受欢迎的
If you say that something is in, or is the in thing, you mean it is fashionable or popular.
e.g. A few years ago jogging was the in thing.。.
几年前慢跑很流行。
e.g. It is the 'in' place to go for a quick drink after work.
那是一个“很受欢迎”的地方，工作之后可以去那儿喝上几杯。
2、（与现在分词连用）在…过程中
You use in with a present participle to indicate that when you do something, something else happens as a result.
e.g. In working with others, you find out more about yourself.
在与别人一起工作的过程中，你会进一步认识你自己。
3、肯定会经历；注定遭受
If you say that someone is in for a shock or a surprise, you mean that they are going to experience it.
e.g. You might be in for a shock at the sheer hard work involved.。.
所做工作之艰辛可能会让你大吃一惊。
e.g. When you venture outside, you are in for a surprise.
你外出探险时，定会遇上意想不到之事。
4、对…怀有仇恨；伺机报复…
If someone has it in for you, they dislike you and try to cause problems for you.
e.g. The other kids had it in for me.
其他的孩子对我怀恨在心。
5、卷入；参与
If you are in on something, you are involved in it or know about it.
e.g. I don't know. I wasn't in on that particular argument.。.
我不知道。我没有参与那一争论。
e.g. I'm going to let you in on a little secret.
我要向你透露一个小秘密。
6、与…友好相处；深得…的欢心
If you are in with a person or group, they like you and accept you, and are likely to help you.
7、因为；原因是
You use in that to introduce an explanation of a statement you have just made.
e.g. I'm lucky in that I've got four sisters.
我很幸运，因为我有4个姐姐。
1. 表示在某物的形体或范围中，常译作“在„„内，在„„中”。如：
She was still lying in bed at eight this morning. 今天早上八点钟时她还在被窝里躺着。 He was so hurried that he left the key in the lock. 他是如此地匆忙，竟把钥匙忘在锁里面了。
2. 表示在某范围或者空间内的某一点，常译作“在„„内 / 里面”。如：
The story happened in Sichuan Province.故事发生在四川省内。 You can see thousands of stars twinkling in the sky. 你会看到成千上万颗星星在空中闪耀。
3. 表示穿着，戴着。如：
He was dressed in 本站… a dark suit at the funeral. 葬礼上他穿者一套深色西服。
The lady in white was in charge of the company. 那位白衣女子掌管着这家公司。
4. 用于描述具体的环境。如：
Now they are still standing in the rain. 他们现在还在雨中站着呢。 They could see nothing in the darkness. 黑暗中他们什么也看不见。
5. 表示构成„„的整体 / 局部，包含„„在内。如： All the paintings in his collection were bought in Japan. 他收藏的所有的画都是在日本买的。 We can clearly recognize his farther in him. 在他身上我们可以清楚地看到他父亲的影子。
6. 表示在某段时间以后，后面接表示一段时间的名词短语。如：
We’ll return in a few days. 我们几天后就回来。
Mom will be well again in three weeks’ time. 妈妈三周后就会好的。
7. 表示某事的形式、形状、安排或数量。如：
The students sat in rows on the playground. 学生们一排排地坐在操场上。
When new school year begins, the students come to school in twos and threes. 新学期开始了，学生们三三两两地来到学校。
8. 表示所处状态或状况或表示正在进行的动作。如：
I bought the car ten years ago, yet it is still in good condition. 我这辆车是十年前买的，现在仍然很好。
Please put the books in good order before you leave. 离开前把书整理好。
9. 表示所使用的语言、材料等。如：
Please write the composition in blue ink. 请用蓝色墨水写作文。
The old man is in good health. 这位老人身体很好。
His grandmother's life is in danger.他祖母生命危险。
The woman is in trouble.这位妇女处于困境中。
1、在（特定年、月等）；在…期间
If something happens in a particular year, month, or other period of time, it happens during that time.
e.g. 。.。that early spring day in April 1949.。.
1949 年4月早春的那一天
e.g. Export orders improved in the last month.。.
上个月出口订单增加了。
2、在（某一情形、形势）之中
If something happens in a particular situation, it happens while that situation is going on.
e.g. His father had been badly wounded in the last war.
在上次战争中，他的父亲受了重伤。
e.g. 。.。issues you struggle with in your daily life.
你在日常生活中费力应对的问题
3、花费…时间
If you do something in a particular period of time, that is how long it takes you to do it.
e.g. He walked two hundred and sixty miles in eight days.
他在8天里走了260英里的路。
4、在（一段时间）之后
If something will happen in a particular length of time, it will happen after that length of time.
e.g. I'll have some breakfast ready in a few minutes.。.
几分钟后我就能做点儿早饭出来。
e.g. They'll be back in six months.
6个月之后他们就会回来。
5、在（某一年龄段）之中
You use in to indicate roughly how old someone is. For example, if someone is in their fifties, they are between 50 and 59 years old.
e.g. 。.。young people in their twenties.
20多岁的。年轻人
e.g. 。.。Molly, a tall woman in her early sixties.
莫莉，一位60出头的高个女士
at，in，on
这些前置词在表示地点或时间时均含“在……”之意。
at 表地点时，指空间位置上的某一点；表时间时，指在时间上的某一时刻。
in 表地点时，指在某一立体空间范围内；表时间时，指一段时间或与年、月、季节时间连用。
on 表地点时，指某物与另一物表面相接触，或与某地方接壤等；表时间时，指在某一天或某一天的某个时间，尤指在星期几。
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