1
possessive determiner + brother
常用所有格修饰。
My brother is a teacher.
我的兄弟是一名教师。
兄弟
先理解核心含义，再看它在真实句子里的用法。
兄弟
a male with the same parents as someone else
My brother is a teacher.
我的兄弟是一名教师。
同一父母的儿子。
Son of the same parents as another person.
对宗教或兄弟会成年男性成员的尊称
Title of respect for an adult male member of a religious or fraternal order.
与他人至少有一个共同父母的男性(参见同父异母兄弟、继兄弟)。
A male having at least one parent in common with another person (see half-brother, stepbrother).
对兄弟会/姐妹会组织的成年男性成员、运动中的同志,或对陌生人的尊称。
Title of respect for an adult male member of a fraternal/sororal organization, or comrade in a movement, or even a stranger using fictive kin.
My younger brother is studying at a university in Beijing.
我的弟弟正在北京的一所大学读书。
She has three brothers, all older than her.
她有三位哥哥，都比她年长。
We grew up together, so he's more than a friend; he's like a brother to me.
我们一起长大，所以他不仅仅是朋友，对我来说就像兄弟一样。
常用所有格修饰。
My brother is a teacher.
我的兄弟是一名教师。
强调所属关系的一种表达。
He is a brother of mine.
他是我的一个兄弟。
用于宗教或社团称呼。
Brother John is a monk.
约翰修士是一名修士。
Not this
I have two brother.
Use this
I have two brothers.
中文'兄弟'的复数不变，但英语可数名词复数必须加-s，所以应使用brothers。
Not this
My brother name is Jack.
Use this
My brother's name is Jack.
中文用'的'表示所有格，英语要用's，因此brother后需加's。
Not this
Brother is tall.
Use this
My brother is tall.
中文可省略限定词，但英语中单数可数名词前通常需要冠词或物主代词，所以应加my。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
哥哥；大哥
My big brother is a doctor.
我哥哥是一名医生。
弟弟
He is my little brother.
他是我的弟弟。
哥哥（较正式）
His elder brother works in a bank.
他的哥哥在银行工作。
弟弟（较正式）
She has two younger brothers.
她有两个弟弟。
亲兄弟；歃血为盟的兄弟
They swore to be blood brothers.
他们发誓要成为结拜兄弟。
姻亲兄弟（姐夫、妹夫等）
My brother-in-law is a teacher.
我的姐夫是一名教师。
老大哥（指监视或控制他人的权威人物或机构）
The government is watching our every move like a big brother.
政府像老大哥一样监视我们的一举一动。
血盟兄弟（指通过仪式结拜的兄弟）
They became blood brothers and promised to always protect each other.
他们成了血盟兄弟，发誓永远保护彼此。
异母兄弟（指亲密的朋友，如亲兄弟）
Even though we're not related, he's like a brother from another mother.
尽管我们没有血缘关系，但他就像我的亲兄弟一样。
兄弟，能借我一角钱吗？
During the Great Depression, many asked, 'Brother, can you spare a dime?'
大萧条时期，许多人问：‘兄弟，能借我一角钱吗？’
他不重，他是我兄弟。
The song 'He Ain't Heavy, He's My Brother' is about supporting a struggling sibling.
歌曲《他不重，他是我兄弟》是关于支持一个挣扎的兄弟姐妹。
Use brother naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
兄弟的英文brother，联想'bro'像'不弱'，因为兄弟互相支持，不弱小。
通常用于指代同父母或同父/同母的男性亲属；在非正式或日常对话中常见，正式场合也可使用，但一般较少用于学术或官方文本。
可数名词；复数形式为brothers
Dictionary facts from ECDICT, WIKTIONARY.