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初中英语总复习:初三上册英语知识点

武汉状元教育2019-03-11 10:52

  Unit2 How often do you exercise?

  【重点语法】

  1. 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。

  2.“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,

  3. 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:

  1)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。

  2)how long “多久”

  —How long did it take you to clean thehouse? 你打扫房子用了多久?

  —It took me half an hour to clean thehouse. 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)

  【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

  18. come 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 be

  maybe 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. a few / few / a little / little

  a few (少数的,几个,一些)

  a little (一点儿,少量)

  表示肯定

  few (很少的,几乎没有的)

  little (很少的,几乎没有的)

  表示否定

  修饰可数名词

  修饰不可数名词

  People can live to 100, but few people canlive to 150.

  There is little time left. I won’t catchthe first bus.

  Could you give me a little milk?

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