人教版初二英语八年级上册Unit2 知识点 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 amonth. 他一个月后能回来。 2）how long “多久” — How long did it take you toclean the house? 你打扫房子用了多久？ — It took me half an hour to cleanthe 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） 【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=moststudents 15. shop=go shopping=do someshopping 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 iscrying. Maybe she is hungry. The woman may be ateacher. 2. a few / few / alittle / little a few (少数的，几个，一些) a little...
