表地点的介词at、on、in到底怎么用
【at、on、in的用法】
一、at
1、用在表示地域面积不大的某个点的地方（如饭桌旁、电影院、车站、机场等）前（to refer to a pos ition or location which we see as a point）
I was sitting at my desk. (当时我正坐在课桌旁。
)
2、用在公司名称（侧重表达的是工作的单位，而不是工作地点）前（to talk about locations at comp anies, workplaces when we see them as a place of activity）
How many people are working at Microsoft? (有多人在微软工作？)
3、用在很多人参与的活动场合前（to refer to activities which involve a group of people）
Were you at Lisa’s party/the cinema/the theatre? (你当时在丽莎的聚会上/电影院里/剧院里吗？)
4、用在学校前（with school/college/university）
She always did well at school. (她在学校表现一直很好。
)
5、用在具体地址、某人家里前（to refer to an address or someone's house)
They once lived at number 12 South George’s Street. (他们曾经住在南乔治街12号。
)
6、用在公共服务场所（to talk about public places where we get treatments, such as a hairdr esser’s or doctor’s surgery）
I can’t meet at four. I’ll be at the hairdresser’s until five. (四点我无法跟你碰面。
我在美发店要呆到五点。
)
7、用在大部分商店前（to refer to most shops）
Look what I bought at the butcher’s today. (看看我今天在肉店都买了些什么。
)
8、用在旅途中经过的地点前（to refer to a place which is a part of our journey）
We stopped at a very nice village. (我们途经一个很漂亮的村庄。
)
9、用在不含day的节假日前（to refer to a holiday without “day”in its name）
People will always enjoy a big dinner at Christmas. (人们在圣诞节总会享用一顿大餐。
)
【特殊用法】
at home - at work-at the seaside - at sea (on a voyage) - at reception - at the corner of a street - at the back / front of a building / group of people, etc. - arrive at small places or some events
二、on
1、用在任何物体或地点的表面前（to refer to a position on any surface）
I know I left my wallet on the table. (我知道我把钱包落在桌子上了。
)
2、用在道路和河海湖前（to describe a position along a road or river or by the sea or by a l ake）
Dublin is on the east coast of Ireland. (都柏林位于爱尔兰的东部海岸。
)
3、用在建筑物的楼层前（to talk about a floor in a building）
They live on the 15th floor. (他们住在15楼。
)
4、用在公共交通工具前（to talk about being physically on public transport）
I was on the train when she phoned. (她给我打电话时，我在火车上。
)
注意：当我们描述旅游时选择的交通工具时，一般用by，如：He went to Paris by air. (他坐飞机去了巴黎。
) 但是，如果要表达走路，则用on foot。
5、用在小岛前（with small islands）
She spent her holiday on a small island. (她在一个小岛上度的假。
)
【特殊用法】
on the left - on the right - on the way - on holiday - on the radio - on television - on a horse - on the back / front of a letter / piece of paper etc.
三、in
1、用在某个地方的内部前（to talk about locations within a larger area）
I know my book is somewhere in this room. Can anyone see it? (我知道我的书就在这个房间的什么地方。
有谁看到吗？)
2、用在物理意义上的工作地点前（to talk about workplaces when we see them as a physical l ocation）
She works in an open-plan office. (她在一个开敞式的办公室里工作。
)
注意：当表示农场（farm）时，一般用on，如：I've always wanted to work on a farm. (我一直想在农场里工作。
)
3、用在class前（with class）
He found it difficult to concentrate in class. (他觉得很难在课上集中注意力。
)
4、用在国家、城市、县镇或其他地域前（with countries, cities, counties, towns or places as such) They live in New York. (他们住在纽约。
)
【特殊用法】
in the newspaper - in bed - in hospital - in prison - in the street - in the sky - in an arm chair (sit) - in a photograph - in a picture - in a mirror - in the corner of a room - in th e back / front of a car - arrive in a country or town
遇到失意伤心事，多想有一个懂你的人来指点迷津，因他懂你，会以我心，换你心，站在你的位置上思虑，为你排优解难。
一个人，来这世间，必须懂得一些人情事理，才能不断成长。
就像躬耕于陇亩的农人，必须懂得土地与种子的情怀，才能有所收获。
一个女子，一生所求，莫过于找到一个懂她的人，执手白头，相伴终老。
即使芦花暖鞋，菊花枕头，也觉温暖；即使粗食布衣，陋室简静，也觉舒适，一句“懂你”,叫人无怨无悔，愿以自己的一生来交付。
懂得是彼此的欣赏，是灵魂的轻唤，是惺惺相惜，是爱，是暖，是彼此的融化；是走一段很远的路，蓦然回首却发现，我依然在你的视线里；是回眸相视一笑的无言；是一条偏僻幽静的小路，不显山，不露水，路边长满你喜爱的花草，静默无语却馨香盈怀，而路的尽头，便是通达你心灵的小屋……
瑟瑟严冬，窗外雪飘，絮絮自语说了这多，你可懂我了吗？若你知晓，无需说话，只报一声心灵的轻叹，那，便是我的花开春暖。
你相不相信，人生有一种念想，不求奢华不求结果，不求你在我身边，只愿有一种陪伴暖在心灵，那，便是懂得。
有人懂得是一种幸福，懂得别人是一种襟怀，互为懂得是一种境界。
懂得，真好！。