( )they have a brother?( )they have a brother?

问题描述:

( )they have a brother?
( )they have a brother?

这个句子考查含有实义动词的一般疑问句
have 为实义动词,所以变否定以及疑问句要借助助动词,如do 或does.
此句主语为they 为复数的概念,所以 要用到 Do.
does 用于第三人称单数.希望能够帮助到你.