英语 This is the pen used by David.This pen was used by David.这两句有什么差别?
问题描述：
英语 This is the pen used by David.This pen was used by David.这两句有什么差别?
答
This is the pen used by David.意思是：这是大卫用的那支钢笔.
used 是过去分词作定语.
This pen was used by David.意思是：这支钢笔是大卫用的.
本句是一般过去时的被动语态.