how far 与how long的区别
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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
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
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