Question

how long,how soon,how far 怎们用？

比如说 看到···用how long

Answer 1

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？