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英语中，how一词有“怎样”的意思，它可以构成一些短语对数量、时间、高度等进行提问。我们要注意区分这样的三组how短语：
一、对数量提问的how many 与how much
两个短语都是用来提问“多少”的，但提问的对象不同：how many 提问可数名词的数量，后面要用复数形式；而how much 提问的是不可数名词的数量，有时也问物品的价格。例如：
How many apples do you have? 你有几个苹果？
How much rice did Li Xiao eat for lunch? 李潇午饭吃了多少米饭？
How much is Miss Yang’s skirt? 杨女士的裙子多少钱？
二、对时间提问的how often, how long 与how soon
这三个短语都是用来提问“多久”的，但是用法各异：
1.how often 意思是“多久一次”或“多久几次”， 表示“单位时间内的次数”或“每隔一段时间一次”，提问表示频率的时间状语，如every day, usually, often, sometimes, once a week（每周一次）， three times a day（每天三次）， every other day（每隔一天）等。例如：
——How often do you go to the cinema? 你多久去看一次电影？
——Twice a month. 每月两次。
——How often does the overseas Chinese come back to see his parents?
那位华侨多久回国探亲一次？
——Once a year. 一年一次。
2.how long 意思是“多久”，提问的是表示“一段时间”的状语，如for three days, for half an hour, since 20 years ago（自从20年前），since last weekend（自从上个周末）等。例如：
——How long does it take you from home to school? 你从家到学校需要多长时间？
——For about 5 minutes. 大约五分钟。
——How long has Tom read the book? 那本书汤姆看了多长时间了？
——Since last Friday. 自从上个星期五。
3.how soon意思是“还要多久（时间）才……”，提问的是表示“将来的一段时间以后”的状语，主要体现在“in+一段时间”这个特定的短语上。在这里，in 用于在将来某时间上，表示“在……以后”，如in five days（在五天以后）， in half a year（在半年以后）， in a century（在一个世纪后）等。但是，像“after a week, after ten hours”这样的时间短语就不能用how soon进行提问，而要用when 这个疑问词了。例如：
——How soon will Kate leave for London? 凯特多久以后动身去伦敦？
——In two weeks. 两个星期以后。
——How soon will they fly to Beijing? 他们多久以后飞往北京？
——In an hour. 一个小时以后。
三、对高度提问的how tall 与how high
这两个短语都是用来提问“多高”的，how tall常询问人、树等细长物体的高度，而how high常询问建筑物、山体等的高度。例如：
How tall is Jackie Chan? 成龙多高？
How high is Mount Tai? 泰山有多高？
小试牛刀：对划线部分提问。
1. There are eleven players in a football team.
2. We want five pieces of bread.
3. The color TV set is 2,000 yuan.
4. Kathy writes to her pen pal once a week.
5. His brother watched TV for two hours last night.
6. Xiao Yu will come back in half an hour.
7. He went to Japan after a month.
8. Yao Ming is 2.26 metres tall.
9. The new teaching building is about 50 metres high.
10. I often go to work on foot.
[Key: 1.How many players are there in a football team? 2.How much bread do you want? 3.How much is the color TV set? 4.How often does Kathy write to her pen pal? 5.How long did his brother watch TV last night? 6.How soon will Xiao Yu come back? 7.When did he go to Japan? 8.How tall is Yao Ming? 9.How high is the new teaching building? 10.How do you often go to work?]
一、对数量提问的how many 与how much
两个短语都是用来提问“多少”的，但提问的对象不同：how many 提问可数名词的数量，后面要用复数形式；而how much 提问的是不可数名词的数量，有时也问物品的价格。例如：
How many apples do you have? 你有几个苹果？
How much rice did Li Xiao eat for lunch? 李潇午饭吃了多少米饭？
How much is Miss Yang’s skirt? 杨女士的裙子多少钱？
二、对时间提问的how often, how long 与how soon
这三个短语都是用来提问“多久”的，但是用法各异：
1.how often 意思是“多久一次”或“多久几次”， 表示“单位时间内的次数”或“每隔一段时间一次”，提问表示频率的时间状语，如every day, usually, often, sometimes, once a week（每周一次）， three times a day（每天三次）， every other day（每隔一天）等。例如：
——How often do you go to the cinema? 你多久去看一次电影？
——Twice a month. 每月两次。
——How often does the overseas Chinese come back to see his parents?
那位华侨多久回国探亲一次？
——Once a year. 一年一次。
2.how long 意思是“多久”，提问的是表示“一段时间”的状语，如for three days, for half an hour, since 20 years ago（自从20年前），since last weekend（自从上个周末）等。例如：
——How long does it take you from home to school? 你从家到学校需要多长时间？
——For about 5 minutes. 大约五分钟。
——How long has Tom read the book? 那本书汤姆看了多长时间了？
——Since last Friday. 自从上个星期五。
3.how soon意思是“还要多久（时间）才……”，提问的是表示“将来的一段时间以后”的状语，主要体现在“in+一段时间”这个特定的短语上。在这里，in 用于在将来某时间上，表示“在……以后”，如in five days（在五天以后）， in half a year（在半年以后）， in a century（在一个世纪后）等。但是，像“after a week, after ten hours”这样的时间短语就不能用how soon进行提问，而要用when 这个疑问词了。例如：
——How soon will Kate leave for London? 凯特多久以后动身去伦敦？
——In two weeks. 两个星期以后。
——How soon will they fly to Beijing? 他们多久以后飞往北京？
——In an hour. 一个小时以后。
三、对高度提问的how tall 与how high
这两个短语都是用来提问“多高”的，how tall常询问人、树等细长物体的高度，而how high常询问建筑物、山体等的高度。例如：
How tall is Jackie Chan? 成龙多高？
How high is Mount Tai? 泰山有多高？
小试牛刀：对划线部分提问。
1. There are eleven players in a football team.
2. We want five pieces of bread.
3. The color TV set is 2,000 yuan.
4. Kathy writes to her pen pal once a week.
5. His brother watched TV for two hours last night.
6. Xiao Yu will come back in half an hour.
7. He went to Japan after a month.
8. Yao Ming is 2.26 metres tall.
9. The new teaching building is about 50 metres high.
10. I often go to work on foot.
[Key: 1.How many players are there in a football team? 2.How much bread do you want? 3.How much is the color TV set? 4.How often does Kathy write to her pen pal? 5.How long did his brother watch TV last night? 6.How soon will Xiao Yu come back? 7.When did he go to Japan? 8.How tall is Yao Ming? 9.How high is the new teaching building? 10.How do you often go to work?]