七年级下册五个频率副词

七年级下册五个频率副词
七下Unit 5（频度副词）
例句观摩
1. Do you often come to school by bike?
2. How do you usually come to school?
3. I always come to school by bus.
4. I usually come to school on foot, but sometimes by bike.
5. I seldom walk to school.
6. I never come to school by subway.
7.-How often do you come to the library?
-Once. / Twice. / Three times a week. / Very often. / Seldom. / Every day.
通过观察上述句子，你知道画线部分的词在英语中叫作什么副词吗?它在句中的位置是怎样的?对这些副词提问应用哪个疑问副词呢?
表示行为动作发生频度的词，被称为频度副词，也可称为时间副词。

如: always, usually, often, sometimes，once, twice，seldom等。

但它们各自表示动作发生的频率有所不同。

1. 图解频度副词的百分比。

(阴影部分表示各自的频率)
(百分比是表示各个副词的频率)
★ always
always意为“总是”，相当于all the time。

与现在进行时连用时，表示强烈感情色彩。

如:
(1) I always get up at six in the morning.我总是在早晨六点起床。

(2) He is always smoking.他总是抽烟。

(厌恶)
(3)She is always helping others.她总是帮助别人。

( 赞赏)
★ usually
usually可以指通常的动作，但是侧重已经形成的习惯，它从已经形成的角度来说明动作。

如:
(1) I usually do some shopping with my parents on Sundays.
我经常在星期天和我的父母一起去买东西。

(2) He usually goes to school by bike.他通常骑自行车上学。

★ often
often是指经常性的动作，意思为“常常，经常”。

如:
(1)The boy doesn't often do his homework. 这个孩子经常不做作业。

(2) He is often late for school.他经常上学迟到。

★ sometimes
sometimes意思为“有时，不时”，表示次数较少(低于often所表达的次数),常常与一般现在时或一般过去时连用。

如:
(1) Sometimes he goes to work by bike ，and sometimes he goes by bus.
有时候他骑自行车上班,有时候他乘公共汽车上班。

(2) Sometimes I help my parents in the house.有时候我帮助父母做家务。

★ hardly 和seldom
它们两个的意思均为“很少,几乎不”,它所表示的次数非常少，少得几乎没有。

它们存在的句子被看成是否定句。

如:
(1) He hardly drinks.他几乎不喝酒。

(2) She seldom plays cards.她很少打牌。

★ never
never意思为“决不，从未”，表示一次都没有。

如:
(1) He never lives there. 他从来都没有在那儿住过。

(2) She never has anything to do.她一向无所事事。

以上的频度副词都表示模糊频率，没有准确地说某事在一段时间内发生的次数。

还有一些是较准确的频度副词。

这些频度副词常作状语，放在句尾。

I drink milk and eat vegetables every day.我每天喝牛奶，吃蔬菜。

I exercise once a week.我每周锻炼一次。

I eat McDonald's twice a month. 我一个月吃两次麦当劳。

I visit my grandmother four times a year.我一年去看奶奶四次。

表示较确定的频率的短语有:
every day每天
once a week一周一次
twice a month一个月两次
four times a year一年四次
once two weeks两周一次
twice three months三个月两次
2. 频度副词的位置:
多在行为动词之前，be动词、情态动词、助动词之后,
若放在句首，则表示强调或修饰全句。

如:
He always helps others.他总是帮助别人。

She is seldom worried.她很少忧虑。

We don't often watch TV.我们不经常看电视。

Sometimes he has some bread for breakfast.有时他早餐吃面包。

3. 对频度副词或频度副词短语提问可用how often ,意为“每隔多久”。

如:
(1)- How often do you go to the library?
你们每隔多久去一次图书馆?
-We go to the library three times a week.
我们每周去三次图书馆。

(2)-How often does he play computer games?
他每隔多久玩一次电脑游戏?
-He usually plays computer games.
他经常玩电脑游戏。