她还有一个哥哥用英语怎么说

"She has a brother" 用英语说就是 "She has a brother."
这是一句基本的英语句子，用来表达“她有一个哥哥”的意思。其中，"she" 是主语，"has" 是动词，"a brother" 是宾语。
例句：
She has a brother who is a doctor. (她有一个是医生的哥哥。)
She has a brother who lives in New York. (她有一个住在纽约的哥哥。)
She has a brother who is three years older than her. (她有一个比她大三岁的哥哥。)