你好這里用how long提問比較好,因為它是對一段時間進行提問.
下面是how often ,how soon, how long的用法,可以仔細看看就明白了.
how long意為“多久、多長時間”,主要是對一段時間進行提問,答語通常是（for）three days/weeks/months等時間段,它可用于各種時態(tài).
How long do you stay in Beijing every year? 每年你在北京住多久?
How long have they lived here? 他們住在這里有多久了?
—How long were you not at school last year? 去年你多久沒上學(xué)?
—About two weeks. 約兩周.
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how soon意為“還要多久”,是對從某個基本時間到將來某動作結(jié)束或某動作發(fā)生這段時間提問,常用在一般將來時態(tài)的句子中,其答語通常是“in + 一段時間”.
—How soon can you finish the work? 還要多久你能完成這項工作?
—In half an hour. 半小時后.
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how often意為“多久……次、是否經(jīng)常”,用來提問在某一特定的時間進行某個動作的次數(shù),答語通常是always,usually,often,sometimes,once/twice a day/month等.
—How often do you get to school very early? 你多久早到校一次?
—Usually. 通常.
—How often do you see a film? 你多久看一次電影?
—Once a month. 每月一次.