作业帮he lived in china when he was born 为什么不用since
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/13 04:01:43
he lived in china when he was born 为什么不用since
he lived in china when he was born
因为都是过去式.
注意下面的区别::
He has been living in china since he was born
他从出生,一直住在中国.
如果用since ，前面的主句就要用现在完成时