区别how-often-how-long--how-soon-how-far--how-many

How often 多久一次; How many多少;
How long多久; How soon多久后；How far 多远
一、用法
1.How often对never,hardly every,once a month等表示频率的词进行提问。

How often表示“多少时间一次或每隔多久”.是就做某事的频率提问。

针对How often的回答一般
是“Twice a year”.“Three times a week”.
e.g. “How often do you watch TV?”
“Tree times a week.”
2.How many对数字提问,且在后面How many要跟一个复数名词。

eg:She eats only one egg for breakfast.
Does she eat one egg for breakfast?
How many eggs does she eat for breakfast?
3. How long表示“时间多久或物体多长”.表示时间侧重指“一段时间”.针对“How long”的回答一般是时间段,
如“for three days”,“three years”
e.g. “How long were you away last year?”
“About two weeks”
4. How soon表示“多久之后”.侧重某人某事能多快时间完
成. How soon的回答一般为: “ in + 时间
段” e.g. “ in two days”“in five years”
e.g. “How soon will you be ready?”
“I’ll be ready in five minutes”
5．How far表示“多远”
How far is it?
二、练习题
1. “_______have they studied English?”
“They have studied English for three years.”
A. How long
B. How many
C. How often
D. How soon
2. “______will he leave here?”
“He will leave here in a month”
A. How often
B. How long
C. How soon
D. How many times
3. “____does he watch TV”“Once a week.”
A. How long
B. How soon
C. How often
D. How many
4. I don’t know_______ he will get here.
A. how long
B. how soon
C. how often
D. how many
5. “_____does he take this medicine?”
“Twice a day.”
A. How soon
B. How long
C. How much
D. How often
6. “_______have you been at this factory?”
“I have been here since 1993.”
A. When
B. How long
C. How often
D. What time a
7. “________can you finish this w ork?”
A. How often
B. How soon
C. How long
D. How far
8. “__________ will he stay here?”
A. How many times
B. How often
C. what time
D. How long
9. _______does your sister write to your parents?
A. How many
B. How often c. How long D. How far
10. ________does it take you to finish you homework every day?
A. How long
B. How often
C. How soon
D. How much。