have you seen my pen anywhere
问题描述：
have you seen my pen anywhere
did you see my pen anywhere?这两句的不同之处在哪里?
答
1.have you seen my pen anywhere(现在完成时)have 强调的是到目前有没有看见我的刚笔
2.did you see my pen anywhere(一般过去时) did 强调的是过去有没有看见我的刚笔