How far 是提问“路程有多远”,询问距离的.
如 How far is it from his house? 距离他家有多远?
It’s 6 kilometres.六公里.
问时间的有How often, how long与 how soon
How often有“多久一次”的意思.是就做某事的“频率”提问.针对How often的回答一般是 ：Twice a year”. “Three times a week”.
如 --How often do you watch TV? 你多久看次电视?
--Tree times a week.一周三次.
How long表示 “时间多久或物体多长”. 侧重指 “一段时间”.针对 “How long” 的回答一般是时间段,如 “for three days”, “three years” .
如 --How long were you away from home last year? 你去年离家多久?
--About two weeks”.大概两个礼拜.
How soon表示 “多久之后”,侧重某人某事能多快时间完成.How soon的回答一般: “ in + 时间段”,如 “ in two days” “in five years”
如 --How soon will you be ready? 多久之后你能准备好?
--I’ll be ready in five minutes.5分钟后.