Howfar和howlong的区别

1.how long“多长”,询问动作在时间上所持续的长度.其答语部分或划线部分可能是：
1）“for + 时间段”,有时可能没有介词for.如：
---How long did he wait for you here?他在这儿等了你多久?
--- For two hours.两个小时.
It took him 20 minutes to finish his homework.(对话线部分提问)
→How long did it take him to finish his homework?
2）“since + 具体时间”,“since + 时间段 + ago”或者“since + 从句”.如：
---How long are you feeling like this?像这样已经多久了?
---Since last night.从昨晚到现在.
3）表示时间的between…and…,from…to…等介词短语.如：
They were playing football from 9:00 to 10:00 yesterday.(对话线部分提问)
→How long were they playing football yesterday?
另外,how long也可以询问某事物的具体长度.如：
---How long is the desk?这张桌子有多长?
---1.2 meters.1.2米.
2.how soon“多久,多快”,询问动作在将来要经过多长时间才会发生.其答语部分或划线部分可能是：in + 时间段.如：
He’s going to Zhengzhou in two days.(对话线部分提问)
→How soon is he going to Zhengzhou?
3.how far“多远”,询问路程、距离.如：
How far is it from here to school?从这儿到学校有多远?参考资料：

how far 多远
1.How far is it from the Bank of school?银行离学校有多远
2.How far is the Earth from the sun?地球离太阳有多远?
how many
1.Library how many people?图书馆有多少人?
2.Today,the number of individuals being late?今天有多少个人迟到?
how much 多少
1.How much of this pen?这支钢笔多少钱?
2.How much is that coat?那件衣服多少钱?
how old多大年纪
1.How old are you 你几岁了?
How old are he?他多大了?
when 什么时候,
1.Don't get excited when you talk.你说话时别激动.
2.When did you last see Margaret?你上一次见到玛格丽特是什么时候?
why 为什么
1.Why should you be so interested in my affairs?你为何对我的事这么感兴趣?
2.That's why I came here.那就是我为什么要来这里的原因
where 哪里
1.Where does he come from?他是哪里人?
2.Where shall we go?我们去哪里?

how long
how long 是对时间长短的提问
har far是对距离长短的提问

about ten minutes' walk 是大概要走十分钟的路的意思.（即如果走路要花十分钟,由此可见 强调的是十分钟这个时间了）
how far对距离提问
how long是对时间多久提问或对长度提问

它们是词组,没有词性.
区别：how far 一般问距离,比如两地距离
how long 一般问长度,也可指干某事的频率 问长度比如桌子长度
换个说法,就是how far 问的一般都是比较远的距离,how long 问的一般比较短
例子：
how long is the bridge?how long have you been to China?
how far is it from Nanjing to Shanghai?