(how often does your mother wash the clothes?按所给的提示回答问题7week

---- How often does sam pack his schoolbag?
---- (Sam packs his schoolbag) twice a day.
How often 用于提问动作的频率.“多长时间一次”
---- When/ What time does your father hang up his clothes
---- My father hangs up his clothes at seven.
When/What time 用于提问动作发生的时间.“什么时候”