频度副词
1.频度副词：表示动作发生间隔（既频率）的副词。

它们有：always ; usually ; often ; sometimes ;
seldom ； hardly ever ; never 等。

2. how often意为“多久一次”，用来提问在某一段时间内进行某个动作的频率。

其回答通常是
often、sometimes、never、hardly ever、always、once a day、once a week等等表示频率的副词
或是短语。

例: --- She hardly ever watches TV. （划线提问）
--- How often does she watch TV
例句理解：1. —What do you usually do on weekends
—I often go to the movies.
2. —How often do you shop
—I shop once a week.
3. — How often does she exercise
—She exercises every day.
3.频度副词：表示频率不确定
频率短语表示频率确定
（1）不确定的频度副词
always（100%）＞ usually（约80%~90%）＞ often（约60%）＞ sometimes（约30%）
＞ seldom（约20%）＞ hardly ever（约10%）＞ never（0%）
（2）表示确定的频率短语
every day/week/month/year 每天/周/月/年 once a week 每周一
次
twice a week 每周两次 twice a month 一月两次
three times a day 一天三次
注：三次或三次以上一般用“基数词＋times”表示。

（3）在句中位置：频度副词在句中通常放在be动词、助动词、情态动词之后，在实义动词之前。

例：She is often late for school.
I can never be sure.
He always helps me.
课堂巩固练习:
一、对划线部分提问
1）He always plays basketball after school.
_______ does he always _______ after school
2) They hardly ever play football.
_______ _________ ________ they play football
二、单项选择
( ) 1. ---How often ______ she exercise ---Twice a week.
A. do
B. does
C. doing
D. did
( ) 2. I ______ like to drink milk.
A. not
B. doesn’t
C. don’t
D. no
( ) you go swimming ---Sometimes.
A. How often
B. How long
C. how many
D.
How old
( )4. Katrina watches TV once ______ week.
A. a
B. the
C. an
D. ﹨
知识扩展：
1. how long多久（用来提问有多长时间）
回答通常是more than two weeks、for a week、ten years等表示一段时间的状语。

例：—How long did you study English in China
—For three weeks.
2. how soon用来提问“需要多长时间才会”，指某一动作要多长时间以后才能完成或发生。

回答通常是“in＋一段时间”
例：—How soon will you come back
—In a week.
【活学活用】
1.用how far, how often, how long填空。

1) does she usually exercise
2) is it from your home to the school
3) have you been away from (离开) your hometown
答案：1)How often 2)How far 3)How long
2.了解下列频率副词，写出其汉语意思.
always (100%)_______ usually (80%)________ often (60%)______
sometimes (30%)_____ hardly ever(1%)_______ never (0%)_______
4.【区别】How often和How many times
① How often用来提问某个动作间隔多久发生一次，即询问动作发生的频率。

通常对一些表示频
率的副词进行提问；也可以对频度短语进行提问。

② How many times意思是“多少次”，用来提问做某事的次数，往往就once, twice, three
times等
词语进行提问。

典型例题：
1）Li Ming does his homework every day. （就划线部分提问）→
How often does Li Ming do his homework
解析：every day属于频度短语，就频度短语提问用How often.
2）The old man went to the zoo three times this year.（就划线部分提问）→How many times did the old man go to the zoo this year
解析：这里就次数提问用how many times.
课堂巩固：
一、用所给词的正确形式填空
1. I watch TV _________ (one) a week.
2. He watches TV _________ (two) a week.
3. Katrina __________ (exercise) every day.
5.语法归纳
特殊疑问词How的用法
1)询问不可数名词的数量
2)询问价钱或钱的数量。