unit2
how often do you exercise?
一、知识点。
1. -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): 几乎不硬的；困难的；严厉的；勤奋的 a hard writer
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)
2.由how构成的疑问词组的用法。
1howmany+ 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：howmucharethosepants?
2)how many times: “多少次”. 其答语表示次数。如：once ,twice，three times等。
3) how old...询问年龄如：how old are you? i am five.
4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.
(5)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空闲的”：are you free tonight4. at least 至少 at most 最多。
be free “自由的”： a free country freedom(n) 5. stay up 熬夜
免费的”： work for free6. junk food 垃圾食品。
7 “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
8．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.
9．go online = use the internet ：上网10. teenager magazine 青少年杂志。
11. more than two hours=over two hours:超过 12. go to the dentist: 去看牙医。
13. keep healthy = stay healthy = keep in good health: 保持健康。
14. 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
15. 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。
16n) 惊讶： to one’s surprise 令某人惊讶的是 in surprise 惊讶地
surprisebe 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.
17. fifteen percent of the students 百分之十五的学生 16. swing dance 摇摆舞。
18. 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。
19. 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
20. 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。
are the results. 以下是结果。
22. most students use it for fun and not for homework.
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.（v-ing)
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.（动词用不定式）
二、重点句子。
1. 在周末你干什么？我通常看电视。what do you do on weekends? i usually watch tv.
2. 你多久看一次电视？每天都看。how often do you watch tv? every day.
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