he lived in china when he was born 为什么不用since
问题描述:
he lived in china when he was born 为什么不用since
答
如果用since ,前面的主句就要用现在完成时
答
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.