Have you seen him today?与Do you see him today?这两句话除了时态不一样,其它

Have you seen him today?与Do you see him today?这两句话除了时态不一样,其它 Have you seen him today? Yes, I saw him this morning. have you seen john today 和Do you see john today 有什么区别? Have you seen him yet? I have not seen him for a long time .( )you see him ,give hi Had you come yesterday,you would have seen him.这句话有没有语法错误,我认 --Have you seen Mr.Li today? A :Have you seen the temperature today? Will you____(see) him today? Have you ever seen him ________? what do you have today? Have you been corresponding with him?这句话是什么时态?什么用法呢?