1.how long意為多長時間，主要用來對一段時間(如three days, four weeks 等)提問的。
例句：
How long have you been waiting?
你等了多久了？
How long did you spend on your homework?
你做家庭作業用了多長時間？
How long have you been in this game?
你幹這行當多長時間了？
How long have you been in your present job?
你幹現在這工作多長時間了？
How long have you been living in this country?
你在這個國家居住多久啦？
How long have you been employed at this job?
你受雇做這個工作有多久了？
How long does the journey usually take?
這段旅程通常需要多長時間？
How long have they been at war?
他們交戰有多長時間了？
How long can a human being go without sleep?
人不睡覺能活多久？
How long have you lived around here?
你住在這一帶有多長時間了？
How long were you in the queue?
你排多長時間隊了？
How long he'll be able to do so is a moot point.
不知道他還能這樣做多久。
How long will it take you to knit up this pattern?
你織完這個花樣要多長時間？
How long will it take her to swim the Channel?
她遊過英吉利海峽得用多長時間？
How long can you balance on one leg?
你單腿能站多久？
How long do you think this storm will last?
你看這暴風雨會持續多久？
How long will the fine weather hold?
好天氣會持續多久？
How long have you been married?
你結婚多長時間了？
How long does it take to qualify?
需要多長時間才能取得資格？
2 how often意為每隔多久，主要用來對頻率副詞或狀語(如once a week等)提問的。
例句：
How often do you use the bus?
你多長時間坐一次公共汽車？
How often do you go to church?
你多久去教堂做一次禮拜？
How often does he come here? —Once a month.
他(每隔)多久來一次?每月一次。
How often do you go to the cinema?—once a week.
你多長時間去看一次電影？—一周一次。
How often do you go to the theatre?
你多久看一次戲？
How often do you go riding?
你多長時間騎一次馬？
How often do you exercise?
你多長時間鍛煉一次？
How often do you go swimming?
你多久去遊泳一次？
How often do you actually get a gift you really need?
你會多久收到一個你确實需要的禮物？
How often do you water these trees?
你多久給這些樹澆一次水？
How often do you brush your teeth?
你多久刷一次牙？
How often do the buses run?
公共汽車每隔多久一趟？
3. how soon問多久以後做某事；多快；詢問某個事情多久以後發生
常對 “in+一段時間 ”提問， 表示“多久之後”,對（從即時起）到将來某個時刻間的時間長短提問，回答通常為 in+一段時間。
How soon will you arrive here?-I will arrive here in 3 hours.
你多久以後能到達？三小時内。
How soon will you come back?
你多久回來?
How soon can you come up with the money?
你什麼時候（多久）能拿出這筆錢？
How soon can you get here?
你什麼時候能趕到這兒？
4. how far問距離上多遠；到什麼程度[範圍]
How far is it to your house from here?
從這兒到你家有多遠？
How far is it from here?
離這裡多遠？
How far is it to Malcy?
這兒離馬爾錫有多遠？
How far is it to the station?
到車站有多遠？
How far is the airport from here?
機場離這兒好遠？
How far can you throw?
你能扔多遠？
You lived to tell the tale this time but who knows how far you can push your luck.
你這次算是逃過了一劫，不過誰知道你的運氣還會持續多久呢？
How far have you got with that report?
你那個報告寫得怎麼樣了？
How far can we trust him?
我們能夠信任他到什麼程度？
How far is human nature determined by biology?
人性在多大程度上是由其生理因素決定的？
It's still not clear how far the Russian parliament will go to implement its own plans
俄羅斯議院在實施自己的計劃時到底會采取怎樣的極端措施尚不明了
How far did the film tell the truth about Barnes Wallis?
影片講述的巴恩斯·沃利斯的故事有多少真實的成分？
How far will members have progressed towards harmonising their economies?
各成員國在使彼此經濟協調一緻的程序上會有多大進展？
How far gone are you?
你懷孕幾個月了？
牛津高階英漢雙解詞典
說明偶爾也問時間。