How far 跟 How long 用法上有何不同
推荐回答（3个）
how far 是指距离的长短.如果想问“你家里这里多远?”就要用how far.
how long 是指事物,东西的长短（也可是时间）
例句：
How long do you stay in Beijing every year? 每年你在北京住多久？
How long have they lived here? 他们住在这里有多久了？
—How long were you not at school last year? 去年你多久没上学？
—About two weeks. 约两周。
how long有以下两个主要意思：
1. 表示多长时间，主要用来对一段时间(如three days, four weeks 等)提问。如：
A：How long did he stay here? 他在这儿呆了多久?
B：About two weeks. 大约两个星期。
A：How long does it take to get to London from here? 从这里到伦敦要多长时间?
B：At least ten hours. 至少要10个小时。
2. 表示某东西有多长。如：
A：How long is the river? 这条河有多长？
B：About 500 km. 大约500千米。
How far 和How long 的区别
A:
持续多长时间（多久）
how long
How long have you been here?
For five months.
长度（多长）
how long
How long is the bridge?
It’s 500 metres.
距离（多远）
how far
How far is it from here to the zoo?
It’s 6 kilometres
意思不同，how far是多远，how long是多长时间
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