how long 与 how far 的区别 麻烦讲详细点,举几个例子,

how long 与 how far 的区别 麻烦讲详细点,举几个例子,
how long 与 how far 的区别 麻烦讲详细点,举几个例子,

how long 与 how far 的区别 麻烦讲详细点,举几个例子,
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 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
How far 的意思是多远,一般引导提问路程的特殊疑问句
例：How far is it from your home to school? 你家到学校有多远?
How long 的意思是多长时间,一般引导提问时间的特殊疑问句
例：How long have you been in America? 你在美国呆了多久?

前者问时间长短，后者问路程。
How long did you work?
How far is it from your school to the bus station?

How long 多长时间
How long will you be staying in the U.S.?
那您准备在美国停留多久？
How far 指距离“多远”
How far is it from here to the airport?
从这里去机场有多远？

how long是指多长时间
how far是指多远距离，或者到达何种程度
But for how long can China sustain such growth?
但中国能够保持多久这样的经济增长？
I can't imagine how far it could shoot off ornaments though.
我不能想象它能把上面的装饰品射出去多远。