为什么用since?my bother studied at the high school since he joined the army

来源：学生作业学帮网 编辑：学帮网 时间：2024/05/15 04:43:53

为什么用since?
my bother studied at the high school since he joined the army

我的哥哥高中毕业后就去参军了

自从，自什么之后