how-long-how-often-和how-soon的区别

howlong,howsoon和howoften都含有how,并且都和“多长时间、多久”有关,但它们的用法不相同.howlong意为“多久、多长时间”,主要是对一段时间进行提问,答语通常是（for）threedays/weeks/months等时间段,它可用于各种时态.HowlongdoyoustayinBeijingeveryyear?每年你在北京住多久?Howlonghavetheylivedhere?他们住在这里有多久了?—Howlongwereyounotatschoollastyear?去年你多久没上学?—Abouttwoweeks.约两周.________________________________________________howsoon意为“还要多久”,是对从某个基本时间到将来某动作结束或某动作发生这段时间提问,常用在一般将来时态的句子中,其答语通常是“in+一段时间”.—Howsooncanyoufinishthework?还要多久你能完成这项工作?—Inhalfanhour.半小时后.______________________________________________howoften意为“多久……次、是否经常”,用来提问在某一特定的时间进行某个动作的次数,答语通常是always,usually,often,sometimes,once/twiceaday/month等.—Howoftendoyougettoschoolveryearly?你多久早到校一次?—Usually.通常.—Howoftendoyouseeafilm?你多久看一次电影?—Onceamonth.每月一次._______________________________________________自我测试○○○○○○○○○○○○选择填空.1.—_______didthemeetinglast?—Abouthalfanhour.A.HowsoonB.HowlongC.HowfarD.Howmuch2.—_______willEzhou-HuanggangBridgebefinished?—Inafewmonths.A.HowsoonB.HowlongC.HowoftenD.Howfar3.—________willittakeyoutogettothepostoffice?—Abouthalfanhour.A.HowoldB.HowlongC.HowsoonD.Howoften4.—_________doyouwritetoyourmother?—Onceamonth.A.HowmanytimesB.WhattimeisitC.HowsoonD.Howoften5.—_______ayeardoesyourschoolhavesportsmeetings?—Twiceayear.A.HowoftenB.HowsoonC.HowlongD.Howmanytimes_______________________________________________答案：1.B2.A3.B4.D5.A