一、how long有以下两个主要意思
1. 表示多长时间，与延续性动词连用,主要用来对一段时间(如three days, four weeks 等)提问。常用“for+一段时间”和“since+时间点” 回答
A：How long did he stay here? 他在这儿呆了多久?
B：About two weeks. 大约两个星期。
A：How long does it take to get to London from here? 从这里到伦敦要多长时间?
B：At least ten hours. 至少要10个小时。
A: “How long were you away last year?”
B: “About two weeks”
A: —How long will he be away?他要离开多长时间?
B: —He will be away for two days.两天时间。
A: —How long have you been a teacher?你当老师多久了?
B: —For about ten years.大约10年了。
瞬时动词come/ go/ leave/ start/ arrive/ buy/ die/ join/ borrow/ marry等不能与表示一段时间的状语连用
2. 表示某东西有多长。如
A：How long is the river? 这条河有多长？
B：About 500 km. 大约500千米。
二、关于how often的用法
how often用来提问某动作或状态发生的频率，即问某人在一段时间内做某事做了几次。主要对频度副词或状语(如：always，usually， often， never或 twice a day ，once a week, ,three times a month , every day, sometimes,等)提问。
用英语表示多少次，除了一次（once）和两次(twice)外, 其他都用基数词+times来表示，三次 “three times”,五次 “five times”。
A：How often does he come here? 他(每隔)多久来一次?
B：Once a month. 每月一次。
A：How often do you visit your mother? 你多长时间看你妈妈一次?
B：Once a week. 一周一次。
A : How often do you go to the movie? 你多久去看一次电影？
B : Twice a month.
A : “How often do you watch TV?”
B : “Tree times a week.”
A：—How often do you go to see a film?你多久看一次电影?
B：—Once a week.一周一次。
Did Li Ming eat breakfast once last week？上周李明吃了两次早餐。
Danny ate breakfast twice last week.上周Danny吃了一次早餐。
Mr. Wood ate breakfast seven times last week.伍德老师上周吃了七次早餐。）
三、how soon的用法
how soon 指再过多久，主要用来对表示将来的一段时间,常对句子中的in···时间状语进行提问。(如：in an hour, in two weeks 等)提问。如
A：How soon will he be back? 他要多久才回来?
B：In an hour. 1 小时以后。
A：How soon shall we know the results? 我们多久能知道结果?
B：I don’t know.
A：“How soon will you be ready?”
B：“I’ll be ready in five minut
A：--How soon will you be ready?
B：--I’ll be ready in five minutes.
e minutes.
A: —How soon will the building be finished?大楼过多久才能完工?
B: —In a month.一个月吧。
四，how far意思是“多远”，对距离提问时用。
How far is it by rail from Shanghai to Guangzhou? ------- 650 kilometres.
乘火车从上海到广州有多少路程？
How far is it from you home to your school ? ---About two kilometers.
从你家到学校有多远呢？
—How far is it from here to the park?从这里到公园有多远?
—It is two kilometers.两千米远。
一，选填 (how long， how often， how soon ， how far )（最下方美图后有答案）
---1.____________ have you been in China?
---For three years.
---2._____________will he back?
---In five minutes.
---3.______________ do you visit you grandparents?
---Once a week.
---4. ________________ should I throw it?
---five metres.
---5 ___________did you stay there?
---for a week.
---6______________ do his parents let him watch TV?
--- Three times a week.
---7 ________________ will her husband come?
---In two days.
二选择题：
1.--____have you been learn English.
—I have been learn English for six years.
A. How long B. How often
C. How far D How soon
2. --___can you be ready, Andy?
--In ten minutes.
A How much B How often
C How long D How soon
3.—____yogurt do you need? ['jɒgət]酸乳酪
-- ____Three cups.
A. How long B. How far
C. How long D. How much
4.—_____can we board（上 ）our plane?
—In twenty minutes.
A How long B How often
C How soon D How much
5.—Xiao Wang, _____will it take to fly to Guangzhou?
—Sorry, I do not know.
A. how far B. how soon
C. how man
[巩固练习]
1. I don’t know_______ he will get here.
A. how long B. ho
C. how often D. how many
2. “_____does he take this medicine?”
“Twice a day.”
A. How soon B .
C. How much D. How often
3. “_______have you been at this factory?”
“I have been here since 1993.”
A. When B.
C. How often D. What time
4. “________can you finish this work?”
A. How often B. Ho
C. How long D. How far
5. “__________ will he stay here?”
A. How many times B. How often
C. what time D. How long
6. _______does your sister write to your parents?
A. How ma
C. How long D. How far
7. ________does it take you to finish you homework every day?
A. How long B. How often
C. How soon D.
1.“_______have they studied English?”
“They have studied English for three years.”
A. How long B. Ho
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
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
answer BDBBD BAACC