我以前也遇到过这几个词汇✧(＾＿－✿ ，下面我就讲讲区别。be born in通常用于指明出生的年份、月份、城市或国家；be born on 通常用于具体的日期、日子；be born at 则用于更为详细的时间点，例如小时数或者地点。这里就给大家总结了一个它们基础知识的表格，可以先简单了解一下先：
了解完它们的基础知识后，现在就来看看它们的具体区别吧ლ(・∀・ )ლ
1、时间描述的不同
be born in通常用于指明出生的年份、月份、城市或国家；be born on 通常用于具体的日期、日子；be born at 则用于更为详细的时间点，例如小时数或者地点。
例句：
①She was born in 1989. 她在1989年出生。
②He was born on July 4th. 他在7月4日出生。
③She was born at dawn. 她在黎明时出生。
2、精度不同
be born in的在描述上的精度是最低的，它适用于对出生的日期、月份、年份或地点的宽泛描述；而 be born on的精度会更高，在描述上更具体，常用于具体的某一天；最后 be born at则是最具有精度的，常表示特定的时间点或地点。
例句：
①I was born in China. 我在中国出生。
②My father was born on the first day of spring. 我父亲在春天的第一天出生。
③He was born at the stroke of midnight.他在午夜时分出生。
3、语境应用的不同
be born in常用来引出年龄、国家或城市；be born on常用于周年庆祝或纪念日期；be born at常应用于描绘更为详细具体的出生瞬间或地点。
例句：
①She was born in the 90s. 她在九十年代出生。
②People born on February 29th have unique birthdays. 2月29日出生的人有独特的生日。
③The baby was born at the hospital.孩子在医院出生。
be born in 后接月份或大地点，be born on 后接某日，be born at加具体时刻或小的地点。
重点词汇
born
英 [bɔ:n] 美 [bɔ:rn]
vt.bear的过去分词;支撑，支持;亲自携带，运输
vi.结果，生产;和…有关
adj.出生的，出身于…的;天生的，天赋的
一、be born in
落地; 出生于…; 诞; 下生
拓展例句
1、That there's a lurking variable which is just that people are more likely to be born in June.
人们的研究对象之中有一个隐藏变量，那就是大多数人都是在六月出生的。
2、If I am born earlier, perhaps be born in other country, won't get such bestowing.
如果我出生得更早，或者出生在其他国家，就不会得到这样的恩赐。
3、A dynasty enough to affect the process of Chinese Civilization would be born in his hands.
一个足以影响中华文明进程的王朝将在他的手中横空出世。
4、The baby was conceived in march, so will be born in december.
这个小孩是3月份怀的，所以将在12月出生。
二、be born on
出生于
拓展例句
1、Romanian peasants held them to be born on the moon.
罗马尼亚农民认为他们在月亮上出生。
2、We knew the babies were going to be born in different countries but there was also a chance they'd be born on different days because it was so late.
我们知道这两孩子可能会出生在不同的国家，不过我们还想过也许他们会出生在不同的两天。你知道，那天生孩子的时候，时间已经很晚了。
3、Jingjiu city to be born on dec.19.
东莞京九城将于本月19日诞生。
4、The new state to be born on Saturday from a civil war that claimed over 2m lives will emerge on a war footing, fragile, with few workinginstitutions and, sceptics believe, a strong chance of failure.
这个上周六刚刚从导致逾200万人丧生的内战中诞生的新国家，仍将以战争为根基，十分脆弱，几乎没有行之有效的制度，而怀疑者认为，它很有可能以失败告终。
三、be born at
出生于
拓展例句
1、The two cubs are the first to be born at the zoo in10 years.
10年来伦敦动物园中总共出生了两只小狮子。
2、Their mother Abi was the last cub to be born at the zoo in1999.
它们的妈妈Abi是1999年伦敦动物园里出生的最后一只狮子。
3、Dai said his laboratory was already producing a second litter of mini-pigs, which are expected to be born at the end of July.
代说他的实验室正在生产第二窝迷你猪，它们有希望在七月底出生。
4、Grey is lubricious, 2-8 comprise corymb, be born at side branch top;
花白色，2-8朵组成伞房花序，生于侧枝顶端；
本回答被网友采纳"be born in" 强调出生地点，后接地点名词，用于询问或表达具体地点的出生情况。"be born on" 强调出生日期，后接日期名词，用于询问或表达具体的出生日期。"be born at" 使用较少，无明确的释义区别。它们在释义、用法、使用环境、影响范围和形象上存在一些区别，具体内容如下所示。
1. 释义区别：
"be born in" 表示某人出生于某个地方，强调出生地。"be born on" 表示某人在某个日期出生，强调出生日期。"be born at" 没有明确的释义区别，不常用。
例句：
He was born in New York. (他出生在纽约。)
She was born on May 10th. (她在5月10日出生。)
They were born at different times. (他们在不同时期出生。)
2. 语法区别：
"be born in" 后面接表示地点的名词或名词短语。"be born on" 后面接表示日期的名词或名词短语。
例句：
She was born in a small town. (她出生在一个小镇上。)
He was born on a sunny day. (他在一个阳光明媚的日子出生。)
3. 用法区别：
"be born in" 用于询问或表达地点的出生情况。"be born on" 用于询问或表达具体的出生日期。
例句：
Where were you born? (你在哪里出生的？)
She was born on January 1st, 1990. (她在1990年1月1日出生。)
4. 使用环境区别：
"be born in" 和 "be born on" 在正式场合和书面语中更为常见。"be born at" 不太常用，使用较少。
例句：
The famous actress was born in Paris. (那位著名女演员出生于巴黎。)
I was born on a Tuesday. (我在一个星期二出生。)
be born in后接出生的年或月份；出生的较大的地方，如大城市、国家、洲等。
be born on后接出生的日期。
be born at后接具体出生时刻；出生的较小的地方，如家、村、乡村等。
例题
He was born ______ a cold winter morning.
A. on B.in C. at D. /
A【解析】试题分析：句意：他出生在一个寒冷的冬天的早上。在具体某一天的早、下午、晚上，应用介词on。in 用于泛指早、下午或晚上；at 用在具体的时间点前。故选A。考点：考查介词。
二、1.时间介词in , on，at用法有个口诀：
at午夜、点与分，上午、下午、晚用in。
年、月、年月、季节、周之前加上介词in。
将来时态多久后，这些情形亦用in。
日子、日期、年月日，星期之前要用on。
2.地点介词on，at与in的用法辨析
介词at表示较小的地方，如家、村、乡村等，如：He lives at a small village.
介词in表示较大的地方，如大城市、国家、洲等，如：He lives in Beijing.
介词on表示一物放在另一物上面，两者紧贴在一起，如：The book is on the table.本回答被网友采纳
"be born in"指的是出生在某个较大的范围、地区或国家内。例如，"I was born in China."（我出生在中国。）"She was born in New York City."（她出生在纽约市。）
"be born on"指的是出生的日期或特定的日期。例如，"I was born on May 10th."（我出生在5月10日。）"He was born on a Tuesday."（他出生在星期二。）
"be born at"相对较少使用，但它可以指具体的地点或某个特定的时刻。例如，"The baby was born at the hospital."（宝宝在医院出生。）"She was born at midnight."（她在午夜出生。）
需要注意的是，具体使用哪种表达方式取决于所描述的具体情境和信息。