how long,how soon,区别
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How soon, How ofen, How long的用法和区别
1、how soon,一般用于将来时态，意思为“多久之后”，侧重某人某事能多快时间完成.后面回答用: in+”如“ in two days”“in five years”
例如：A：How soon will he be back? 他要多久才回来?
B：In an hour. 1 小时以后。
2、how long,表示多长时间，主要用来对一段时间(如three days, four weeks 等)提问例句：A：How long did he stay here? 他在这儿呆了多久?
B：About two hours. 大约两小时。
How long 还表示“东西有多长”
如：A: How long is the river? 这条河有多长？
B: About 50 km. 大约50千米。
3、How often，它是一个对频率提出问题的疑问词,表示“多少时间一次或每隔多久”比如：once a week，three times a week（month 、ye ar……）
例如：A：How often do you play table tennis? 你们多久打一次球?
B：Once a month. 每月一次。
知识点补充：
How far 的意思是多远，一般引导提问路程、距离的特殊疑问句
例：How far is it from your home to school? 你家到学校有多远？
练习题
对划线部分提问
1、It took me three hours to do my homework.
__ __ __ __ __ __to do __ homework?
2、He will come here in ten minutes.
___ ___ will he ___ ____?
3、Mary visits her parents once a week.
____ ____ ____ _____ ____ her parents?
4、It is five miles from the bookshop to the bus station.
————from bookshop to the bus station?
5、There are two apples in my bag.
___ ____ apples ___ ___ in ___ bag?
6、The line is about six meters .
___ ___ is the line?
7、“______will he leave here?”
“He will leave here in a month”
A. How often
B. How long
C. How soon
D. How many times
8. “____does he watch TV”“Once a week.”
A. How long
B. How soon
C. How often
D. How many 9． I don’t know_______ he will get here.
A. how long
B. how soon
C. how often
D. how many
10. “_____does he take this medicine?”
“Twice a day.”
A. How soon
B. How long
C. How much
D. How often
11. “_______have you been at this factory?”
“I have been here since 1993.”
A. When
B. How long
C. How often
D. What time a
12. “________can you finish this work?”
A. How often
B. How soon
C. How long
D. How far
13. “__________ will he stay here?”
A. How many times
B. How often
C. what time
D. How long
14. _______does your sister write to your parents?
A. How many
B. How often c. How long D. How far
15. ________does it take you to finish you homework every day?
A. How long
B. How often
C. How soon
D. How much
答案：1、How long did it take you /your 2、How soon/come here
3、How often does Mary visit
4、How far is it
5、How many /are there /your
6、How long
7、C
8、C
9、B 10、D 11、B 12、B 13、D 14、B 15、A