he is at home 对at home提问

at home表示地点,使用疑问词where.Where is/Where's he?
 2.in the supermarket表示地点,故仍然使用疑问词where.Where are you?
 3.on Sundays表示时间,故用疑问词when.When do you usually watch TV and do housework?
再问： 谢谢，my parents usually go to work by bus。对by bus提问 jack feels ill 。对ill 提问 she has three schoolbag 。对three提问 mary often plays with Helen 。对Helen提问
再答： by bus表示方式，用疑问词How. How do your parents usually go to work? 2. ill表示身体状况，用疑问词How。 How does Jack feel? 3. three表示数量，用疑问词How many。 How many schoolbags does she have? 4. Helen表示人，用疑问词Who。 Who does Mary often play with?