询问时间的词语有when，what time，what day，how long，how soon，how often等。虽然这些词语都是询问时间的，但用法却不相同。
1.when用来询问某一点时间，也可询问某一段时间，是“什么时候、什么时间”之意。
①He will go to Beijing next week．
→When will he go to Beijing?
②Han Mei came to see Uncle Wang last week．
→When did Han Mei come to see Uncle Wang?
2.what time常用来询问某一具体时间，是“什么时间、几点钟”的意思。
①I get up at 6:00
→What time d0 you get up?
②The plane will arrive at 8:10．
→What time will the plane arrive?
3.What day用来询问星期几。
Today is Friday．
→What day is it today?
4.how long是“多长时间”的意思，用来询问某一段时间。
①It took my father three weeks to finish the work．
→How long did it take your father t0 finish the work?
②I have been a teacher for 10 years．
→How long have you been a teacher?
5．how soon意思是“多久(以后)，”用来询问将来的某一时间。
①He will finish the work in a week．
→How soon will he finish the work?
②The train will leave at once．
→How soon will the train leave?
6.hOW often是“多久一次”之意，用来询问频度。常见的频度词语有：always，usually，often，sometimes，never，once aday，twice a week，three times a month等。
①Fenny cleans her rooms once a week．
→How often does Fenny clean her rooms?
②I make phone calls to my friends twice a month
→How often do you make phone calls to your friends
How often 和how many times的区别如下：
how often意思是“多久一次，多常”，用来对动作在时间上所发生的频率提问，其提问部分或答语部分往往是always, usually，often，sometimes, hardly （ever），never 等频度副词或every day, every week等“every+时段”及once a week, three times a year等“词数+时段”的副词性短语。例如：
---How often do you watch TV? 你多久看一次电视？
---Every Saturday evening. 每星期六晚上。
how many times意思是“多少次”，用来询问动作发生的次数。其提问部分或答语部分往往是表示次数的once, twicey以及three times, ten times等“基数词+times"等结构。例如：
---How many times have you been to Beijing?你到过北京几次？
---Twice. 两次。
注意下面的对划线部分提问的句子。
I go to the movies three times a week.
对three times提问：How many times do you go to the movies a week?
对three times a week提问：How often do you go to the movies.
1. Millie goes swimming （once a week.这个）
How often does Millie go swimming?
2. Simon （never这个）plays football.
How often does Simon play football?
3. My brother plays the violin( for one hour这个）every day
How long does my brother play the violin every day?
4. Sandy plays basketball (three这个）times a week
How many times does Sandy play basketball every week?
5. He eats vegetables and fruit (every day这个）
How often does he eat vegetables and fruit?
6. It takes her( two hours这个） to clean her bedroom
How long does it take him to clean her classroom?
7. She needs (a lot of这个）coffee to drink.
How much coffee does she need to drink?
8. There is (one这个）book in the school bag.
How many books are there in the schoolbag?
9. He carries the food (with a big basket这个）
How does he carry the food?
10. The boy has(some fish and rice这个）for lunch.
What does the boy have for lunch?
1 how long
指多长时间，主要用来对一段时间(如three days, four weeks 等)提问：
How long did he stay here? 他在这儿呆了多久?
About two hours. 大约两小时。
2 how soon
指再过多久，主要用来对表示将来的一段时间(如in an hour, in two weeks 等)提问：
How soon will he be back? 他要过多久才回来?
In two weeks. 两星期之后。
3how often
指每隔多久，主要用来对频度副词或状语(如once a week等)提问：
How often do you visit your mother? 你多长时间看你妈妈一次?
Once a week. 一周一次。