Have you seen my dictionary Yes.l put it in your desk just now

题目

Have you seen my dictionary Yes.l put it in your desk just now
为什么用have.seen而不用Did.see
我觉得看没看到对现在没什么影响啊

答案

提问者的本意是问你是否知道我的词典在哪里?侧重点是你是否知道我的词典在哪里(现在的状态),而不是你有没有见过我的词典(过去的动作).试比较：
Have you seen my dictionary?Yes,I put it in your desk just now./ No,I don't know where it is.
When did you see it?Yesterday.
使用过去时和完成时,其侧重点有明显区别,可根据提问者的本意及回答进行判断