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Unit 2 How often do you exercise
知识点讲解
1 How often do you exercise
exercise n. 练习、锻炼 do morning exercise
v. 锻炼
2） how often表示“多久一次”，是对动作的频率进行提问。
其回答通常有：A 频率副词： always, usually, often, sometimes, hardly ever, never
B 次数＋时间段: 如：once or twice a week
C every ＋时间段: every day (每天)
注意:
表示“一次或两次”时，一般用once和twice表示。
如：once a month一个月一次
表示“三次或以上”时，则用“数词＋times”结构。如：five times a year一年五次
与how有关的短语：
how far(距离)多远；
how long(时间)多长；
how many多少(只可接可数名词的复数形式)；
how much多少，价格（只可接不可数名词）；
how soon(时间)多久后（事情还要过多久才发生）
how old(年龄)多大。
How often 意为 “多久、多经常” 回答用 once a month等
How long 意为“多长时间、物品多长 回答用for+时间多用于现在完成时
How soon 意为“多久” 回答用in+时间、多用于一般将来时
2 help with housework
1）help with sth 帮忙某事
help sb to do sth/help sb do sth 帮某人做某事
I often help my mom _________ (do) housework.
housework n.家务 不可数名词
homework n. 作业 不可数名词
3 What's your favorite program = What program do you like best
What’s your favorite… =What… do you like best 你最喜欢的…是什么？
What’s your favorite program
4 I go to the movies maybe once a month. 我也许一个月去看一次电影。
辨析：maybe 和may be
maybe “也许，大概，可能”。副词 （一般放句首） Maybe you are right. 也许你是对的。
may be “可能是，也许是”。 为“情态动词+be动词”结构。（位于句中） You may be right. 你也许是对的。
(1) The baby is crying ______________she is hungry.
(2) The woman _____________ a teacher .
5 How many hours do you sleep every night
how many+可数名词复数
how much+不可数名词
______________ money do you need
______________ people are there
6 And twenty percent do not exercise at all.
not… at all 一点也不 I don’t like English at all.
exercise （v/n）的用法
1）（动）:锻炼. 如： He exercises every day.
2) (可数名词)：“...操;练习”. 如：do morning/ eye exercises; do math exercises
(不可数名词):“锻炼;运动”讲：如： We often do / take exercise on weekends.
7 It is good to relax by using the Internet of watching game shows, but we think the best way to relax is through exercise.
relax v.休息
relaxed 意为“感到放松的” 修饰人
relaxing 意为“令人放松的” 修饰物
2） It’s + adj+(for sb)+to do sth (对某人来说)做什么是…的
It’s easy for us ______________________ (swim)
3): by: He learns English by singing English songs.
通过…方式
He went home by bus.= He went home on the bus= He took the bus home.
4）on the Internet 上网
5）the best way to relax 放松的最好方式
a way to do sth 做....的方式
6） through 通过… 方式+ 名词： The best way to relax is through exercise .
（从…里面）穿过： Climb through the window.
注意： across横过（从一边到另一边） walk across the street.
8 You can spend time with your friends and family as you play together.
spend time with sb. 和某人度过时光
① spend+时间/金钱+on sth 花费时间或金钱在某物上
spend+时间/金钱+（in ）doing sth 花费时间或金钱做某事
② sb pay +金钱+for sth 支付
③ sth cost sb +时间、金钱.
④ It takes sb+时间+to do sth 花费某人多少时间做某事
I spent 20 yuan ______________ this pen.
A buy B to buy C buying D bought
It takes me 10 minutes ___________________ (go) to school.
9 She says she is afraid.
be afraid to do sth 害怕做某事
be afraid of sb/sth 害怕某人或某物 be afraid of doing sth
I am afraid of snake.
I’m afraid to go there at night.
10 stay up late 熬夜，睡得很晚
stay up 熬夜，不睡觉
辨析： stay out 外出
11 She sometimes goes shopping.
sometimes “有时候” =at times How often
some times “几次” How many times
sometime “某个时候”可指过去或将来的某个时候。 when
some time “一段时间” how long
注：time作可数名词时可作“次数”解；表示“时间”时是不可数名词。
12 use sth. to do sth. 用某物做某事
Sth be used to do sth. 被用来做某事
We use pens _____________ .(write)
13 How come
“怎么会？ 怎么回事？”表示某件事情很奇怪，有点想不通；可单独使用。
How come Tom didn’t come to the party = Why didn’t Tom come to the party
14 Last month we asked our students about their free time activities.
1） ask sb. about sth. “询问某人关于某事”
ask sb. (not) to do sth,
ask sb. for sth. : 向某人要求… 如：ask teacher for help
2） “空闲的”：Are you free tonight
free “自由的”： a free country freedom(n)
“免费的”： work for free.
be free to do sth 自由地做某事
You are free _____________________.(go)
15 However, she has some bad habits, too.
辨析：but和however 表转折关系
but 并列连词 “然而，但是”。 可直接连接前后两个句子，。
However 副词 “然而，但是”。 不能直接连接句子，必须用逗号与句子隔开。
Eg: 1.It began to rain, , we went out to look for the boy.
It a sunny morning， very cold.
16 we found that only fifteen percent of our students exercise every day.
1） find + 宾语 +名词, 发现 ： We have found him (to be) a good boy.
find + 宾语 + 形容词， 发现： He found the room dirty.
find + 宾语 + 现在分词， 发现 ： I found her standing at the door.
find +it +形容词+to do sth. I found it difficult to work out this math proble.
2）数词+percent of+名词，做主语时，谓语动词单复数由后面的名词的单复数决定。
17 It is healthy for the mind and the body. 这有益于身心健康。
healthy adj. “健康的”
health n. “健康”
keep healthy
= stay healthy
= keep in good health: 保持健康
2）mind n.心意 v.介意 mind doing sth. 介意做某事
18 surprise(n) 惊讶:
to one’s surprise 令某人惊讶的是
in surprise 惊讶地
surprised 意为“感到惊讶的” 修饰人
surprising 意为“令人惊喜的” 修饰物
be surprised at sth. 对… 感到意外 (v) 使惊奇、意外：
be surprised to do sth. 惊讶做某事
be surprised that + 从句
如：I was surprised at the news = I was surprised to hear the news.

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