Unit2 How often do you exercise?一、重点短语1.look after = take care of 照顾2. surf the internet 上网3.healthy lifestyle 健康的生活方式keep healthy=stay healthy 保持健康 5.eating habits 饮食习惯 6.take more exercise 做更多的运动7.the same as 与什么相同8.be different from 不同9.once a month 一月一次10.twice a week 一周两次11.make a difference to 对什么有影响12.most of the students=most students 大部分学生13.shop=go shopping=do some shopping 购物14.be good for 对什么有益15.be bad for 对什么有害e home from school 放学回家17.of course = certainly = sure 当然18.get good grades 取得好成绩19.keep/be in good health 保持健康20.take a vacation 去度假21.help with housework 帮助做家务22.on weekends 在周末23.how often 多久一次24.hardly ever 几乎从不25.every day 每天26.be free 有空27.go to the movies 去看电影e the Internet 用互联网29.swing dance 摇摆舞30.play tennis 打网球31.stay up late 熬夜；睡得很晚32.at least 至少33. go to bed early 早点睡觉34.such as 比如；诸如35. have dance and piano lessons 上舞蹈课和钢琴课36.play sports 进行体育活动37. go camping 去野营38.not…at all 一点儿也不…… 39.i n one’s free time 在某人的业余时间40.the most popular 最受欢迎的41.old habits die hard 积习难改42.go to the dentist 去看牙医43.morn than 多于；超过44.less than 少于二、习惯用法1. What’s your favorite……? 你最喜爱的…… 是什么？2. How about…? ...... 怎么样？/ …… 好不好？3.How many+ 可数名词复数+ 一般疑问句？…… 有多少……?4. 主语+find+that 从句. …… 发现……5.. by doing sth. = through + 名词通过做某事6. help sb. with sth. 帮助某人做某事7. spend time with sb. 和某人一起度过时光8. want sb. to do sth. 想让某人做某事9. It’s+ adj.+ to do sth. 做某事的…… 的。
10. ask sb. about sth. 向某人询问某事11. the best way to do sth. 做某事的最好方式三、词语辨析：1. how often 多久一次，用来提问动作发生的频率。
回答用：once ，twice, three times 等词语。
How often do you play sports? Three times a week.how long 多长，用来询问多长时间，也可询问某物有多长。
How long does it take to get to Shanghai from here? How long is the ruler?how far 多远，用来询问距离，指路程的远近。
回答或具体公里数，或30 minutes’ walk / drive…How far is it from here to the park? It’s about 2 kilometers.2. free 空闲的，有空的，反义词为busy. be free 有空，闲着，相当于have time.I’ll be free next week. = I’ll have time next week.还可作“ 免费的、自由的” 解。
be free to do sth. 自由地做某事。
The tickets are free. You’re free to go or to stay.3. 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，也可引导一个问句，相当于疑问句why, 但how come 开头的特殊疑问句使用的仍然是陈述语序。
How come Tom didn’t come to the party? = Why didn’t Tom come to the party?4. stay up late 指“ 熬夜到很晚，迟睡” 。
Don’t stay up late next time.stay up 指“ 熬夜，不睡觉” 。
He stayed up all night to write his story.5. go to bed 强调“ 上床睡觉” 的动作及过程，但人不一定睡着。
I went to bed at eleven last night.go to sleep 强调“ 入睡，睡着，进入梦乡” 。
She was so tired that she went to sleep soon.6. 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.7. percent 百分数，基数词+ percentpercent 没有复数形式，作主语时根据所修饰的名词来判断谓语的单复数。
Forty percent of the students in our class are girls.Thirty percent of time passed.8. more than 超过，多于，不仅仅，相当于over. 在句型转换中考查两者的同义替换。
反义词组为：less than.I lived in Shanghai for more than / over ten years.9. afraid 形容词，担心的，害怕的，在句中作表语，不用在名词前作定语。
I’m afraid we can’t come here on time.be afraid of sb / sth 害怕某人/ 某事；be afraid of doing sth. 害怕做某事。
Some children are afraid of the dark. Don’t be afraid of a sking question.I’m afraid + 从句，恐怕，担心：I’m afraid I have to go now.10. sometimes , sometime, some times , some time 的区别：sometimes 频度副词，有时。
表示动作发生的不经常性，多与一般现在时连用，可位于句首、句中或句末。
(How often 提问)Sometimes I get up very early. ------How often do you get up?sometime 副词，某个时候。
（When 提问）表示不确切或不具体的时间，常用于过去时或将来时，对它用疑问词when.I will go to Shanghai sometime next week. ------When will you go to Shanghai next week?some times 名词词组，几次，几倍。
其中time 是可数名词，（how many times 提问）I have read the story some times. -------How many times have you read the story?some time 名词短语，一段时间. 表示“ 一段时间” 时，句中谓语动词常为延续性动词，（How long 提问）I’ll stay here for some time. -----How long will you stay here?11. 频率副词: always, usually, often, sometimes, never频率副词在句中通常放在实义动词之前, be 动词或助动词之后。
常用于一般现在时态中12.“ 次数” 的表达方法一次once ；两次twice ；三次或三次以上用基数词+ times13. As for homework , most students do homework every day .as for... 意思是“ 至于；关于” ，+ 名词、代词或动词的-ing 形式（即动名词）。
如：As for him ，I never want to see him here. 至于他，我永远不希望在这里见到。
As for the story ，you'd better not believe it. 关于那故事，你最好不要相信。
14. That sounds interesting.这是“ 主语+ 系动词+ 表语” 结构的简单句。
sound （听起来），look （看起来），smell（闻起来），taste （尝起来），feel （觉得），seem （好象），grow （变得）,get（变得）等词在英语中可用作系动词，后跟形容词作表语。
如：It tastes good. 这味道好。
The music sounds very sweet. 这音乐听起来很入耳。
The smoke grew heavier and heavier. 烟雾变得越来越浓了。
15. Be about （介词）“ 是关于…”+ 名/ 代/V-ing16.however 副词，意为“ 然而，可是” ，表示转折关系，可放在句首、句中、句末17.not … at all 意为“ 一点也不”. not 应放在be 动词、情态动词或助动词之后。
即否定句+ at alle.g. The story isn’t interesting at all. 那个故事一点也没有趣。