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人教版八上Unit2 How often do you exercise 单元知识梳理
短语归纳
1.help with housework帮助做家务
2.on weekends在周末 3.how often多久一次 4.hardly ever几乎从不 5.once a week每周一次 6.twice a month每月两次 7.every day每天 8.be free有空 9.go to the movies去看电影 10.use the Internet用互联网 11.swing dance摇摆舞 12.play tennis打网球 13.stay up late熬夜；睡得很晚 14.at least至少 15.have dance and piano lessons上舞蹈课和钢琴课 16.go to bed early早点睡觉 17.play sports进行体育活动 18.be good for对……有好处 19.go camping去野营20.not…at all一点儿也不…… 21.in one’s free time在某人的业余时间 22.the most popular最受欢迎的23.such as比如；诸如 24.old habits die hard积习难改 25.go to the dentist去看牙医26.morn than多于；超过 27.less than少于 28.help sb. with sth.帮助某人做某事 29.How about… ......怎么样？/ ……好不好？ 30.want sb. to do sth.想让某人做某事 31.How many+可数名词复数+一般疑问句？ ……有多少…… 32.主语+find+that从句. ……发现…… 33. spend time with sb.和某人一起度过时光34.It’s+ adj.+ to do sth. 做某事的……的。 35.by doing sth. 通过做某事 36.the best way to do sth.做某事的最好方式
【语法及知识点讲解】
1. 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.
2. ----How often do you usually go shopping
—Sometimes/Twice a week. 有时候/一周两次.
1) go shopping 意为“去购物”。Go+ v- ing : 表示进行某项活动。如：
Go swimming/ shopping/skating/skiing/fishing/climbing/hiking
2)频率副词：always=all the time, usually, often, sometimes=at times , hardly ever, never
(1).sometimes: 有时候； sometime：某时；
some times：许多次/倍; some time: 一段时间
(2). hardly(adv): 几乎不
hard adj.硬的；困难的；严厉的；勤奋的
a hard writer
adv.努力地； 猛烈地 study/rain hard
3）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：
频率副词： always, usually, often, sometimes, hardly ever, never
how often :------次数＋时间段: 如：once or twice a week
every ＋时间段: every day (每天) 区别：everyday（每天的；日常的）
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)
而表示“三次或以上”时，则用“数词＋times”结构。
如：five times a year (一年五次)
4）由how构成的疑问词组的用法
how many+ 可数名词复数 如：how many programs
howmuch+不可数名词 如：how much coffee
但how much=what’s the price of.. 还有“多少钱”的意思 如：How much are those pants
how many times: “多少次”. 其答语表示次数。如：once ,twice，three times等
How old... 询问年龄 如：How old are you I am five.
how long 多久(时间) 常用 for two days，for three hours等回答。
多长（某物的长度） 如：---How long is the river --- 10 kms.
how soon 用来询问过多久，多久以后，其答语是in two hours，in three days等。
如：How soon wil he come back？In an hour。
3. free “空闲的”：Are you free tonight
be free “自由的”： a free country
freedom(n)
“免费的”： work for free.
full “满的；饱的” …be full of… :
The bottle is full of water. 瓶子里装满了水。
“忙的”=busy He had a full life
4．She says it’s good for my health. 她说那对我的健康有益。
(1）be good for：“对……有好处”。如：Doing exercise is good for our health.
（2）be good at：“擅长于……” 如：He is good at playing football.
(3) be good to sb./sth: “对……好” 如：The old woman is good to us.
(4) be good to do sth.: “适合；宜于” 如：The water is good to drink.
(5) be good with: “与……相处好” 如： The teacher is good with his students.
5．go online = use the Internet ：上网
6. Teenager magazine 青少年杂志
7. more than two hours=over two hours:超过
8. go to the dentist: 去看牙医
9. keep healthy = stay healthy = keep in good health: 保持健康
10. ask sb. to do : 叫…做某事
Teacher asked me to clean the classroom.
Ask sb. not to do sth.: 叫…不要做某事
Teacher asked me not to clean the classroom.
ask sb. about sth. : 问某人某事
We asked our students about their free time activities.
ask sb. for sth. : 向某人要求… 如：ask teacher for help
11. help sb. with sth.
如：They help me with this problem. 他们帮助你解决这个问题。
help sb.（to）do.
如：They help you (to) solve this problem. 他们帮助你解决这个问题。
12. surpise
(n) 惊讶: to one’s surprise 令某人惊讶的是
in surprise 惊讶地
surprise v) 使惊奇、意外：
be surprised at sth. 对… 感到意外
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
13. although(conj):“尽管；虽然”，表示转折关系，同义词有though, 不能与but同时使用。
如： Although they’re neighbors, they don’t play together.
= They’re neighbors, but they don’t play together. 尽管他们是邻居，但是他们不在一起玩。
14. maybe (adv): 也许，大概
(Maybe) he (maybe) knows it.
May + v(原)：也许，大概 He may know it.
如：Maybe he is at home.= He maybe is at home.= He may be at home.
15. It’s good to relax by using the Internet or watching game shows.
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.
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： 横过（从一边到另一边） walk across the street.
16. such as =like + 名短：
如： such as winning the game.
for example + 句子：
如：It’s healthy for the mind and the body.
17..Old habits die hard. 恶习难改.
die(v):死亡；消失
death(n): 死亡；
dead(adj): 死的；
dying(adj): 垂死的；临终的；（植）枯萎的 dying wish----遗言
18.You can spend time with your friends and family as you play together.
度过（时间） 如：spend the weekend with family
花费（时间、钱） 如：He spent 20 yuan (in) buying the magazine.
同义句：He spent 20 yuan on the magazine.
He paid 20 yuan for the magazine.
It took him 20 yuan to buy the magazine.
The magazine cost him 20 yuan.
19.percent 名词，意为“百分之……”
百分数用基数+ percent (不用复数形式)，percent做主语时，谓语动词的数要根据其后面的名词来确定
e.g. 50％ fifty percent　百分之五十
Fifty percent of the apples are bad. 50%的苹果都坏了。

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