when， where， what， what， which， which怎么用？
when（什么时候）；用法：问时间；
例子：We play games in the afternoon ? When do you play games?
where（在哪里）；用法：问地点（状语）；
例子：We play games at home on Sunday ? Where do you play games on Sunday?
what（什么）；用法：问人的职业或事物是什么；
例子：He is a worker. What is he? He has a book. What does he have ?
which（哪一个）；用法：问一定范围内特指的人或物；
例子：The big box is mine. Which box is yours? The girl at the door is Ann. Which girl is Ann?
whose（谁的）；用法：问所属关系；
例子：This is her book. Whose book is this ? This book is hers. Whose is this book?
who（谁；什么人）；用法：问人的身份姓名等；
例子：He is LiLie Who is he ? He is my brother. Who is he ?
how（如何）；用法：问健康状况、 做事的方式等；
例子：He is fine/strong. How is he ? I go home by bike. How do you go home?
why（为什么）；用法：问原因；
例子：He isn't at school today because he is ill. Why isn't he at school today ?
