why是提问原因的:Why are you late again?你为什么又迟到了?
when是提问时间的:When does the train leave for Beijing?去北京的火车什么时候走?
what是提问名词的:What is it?它是什么?
which是提问哪一个的:Which one is yours?哪一个是你的?
why是提问原因的:Why are you late again?你为什么又迟到了?
when是提问时间的:When does the train leave for Beijing?去北京的火车什么时候走?
what是提问名词的:What is it?它是什么?
which是提问哪一个的:Which one is yours?哪一个是你的?