Unit 2 How often do you exercise 知识点总结

八年级上册Unit 1 Where did you go on vacation 知识点总结
重点短语：
1. go to the movies 去看电影
2. look after = take care of 照顾
3. surf the internet 上网
4. healthy lifestyle 健康的生活方式
5. go skate boarding 去划板
6. keep healthy=stay healthy 保持健康
7. eating habits 饮食习惯8. take more exercise 做更多的运动
9. the same as 与什么相同
10. be different from 不同
11. once a month一月一次
12. twice a week一周两次13. make a difference to 对......有影响/作用
14. most of the students=most students
15. shop=go shopping=do some shopping 购物
16. be good for 对......有益
17. be bad for 对......有害
e home from school放学回家
19. of course = certainly = sure 当然
20. get good grades 取得好成绩
21. keep/be in good health 保持健康
22. take a vacation 去度假
词语辨析：
1.maybe / may bemaybe 是副词，意为“大概， 可能，或许”，一般用于句首。May be是情态动词，意为“可能是...，也许是...，大概是...”.
The baby is crying. Maybe she is hungry.
The woman may be a teacher.
2. however 副词，意为“然而，可是”，表示转折关系，可放在句首、句中、句末。
3. hard / hardlyhard作形容词，意为“困难的，艰苦的，硬的”;作副词，意为“努力地，猛烈地”。hardly为副词，意为“几乎不”。The ground is too hard to dig.I can hardly understand them.It’s raining hard. The peoplecan hardly go outside.
4. 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。
5. 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。
6. percent 名词，意为“百分之……”百分数的表示方法：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。50%：fifty percent　百分之五十Fifty percent of the apples are bad.50%的苹果都坏了。Twenty percent of the meat is in the fridge.20%的肉都在冰箱
7. 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。The story isn’t interesting at all.那个故事一点也没有趣。
8. It is +adj. to do sth.做某事是……的。It is interesting to playcomputer games.玩电脑很有趣。
9. take,spend, payIt takes sb. some time to do sth.意为“花费某人……时间来做某事”。人(sb.) spend 时间/钱 on sth. “买某物花了……钱”。人(sb.) spend 时间/钱 (in) doing“花费多少时间来做某事”。pay 的主语必须是人，而“花钱买某物”为pay...for...
语法讲解
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。
“次数”的表达方法一次 once， 两次twice，三次或三次以上：基数词+ times, 如：three times, five times,
how often“多久一次”问频率，回答常含有频率词组或短语。
常见的how疑问词：
How soon 多久(以后)—How soon will he be back 他多久能回来 —He will be back in a month.他一个月后能回来。
how long “多久”—How long did it take you to clean the house 你打扫房子用了多久 —It took me half an hour to clean the house.我打扫这房子用了半小时。
(3)How many+名复How much+不可名“多少” 问数量(how much 还可问价格)