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中考网整理了关于初中八年级上册英语期末复习:第二单元,希望对同学们有所帮助,仅供参考。  How often do youexercise?  【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  People can live to 100, butfew?people can live to 150.  There is?little?timeleft. I won’t catch the first bus.  Could you give me?alittle?milk?  3. hard / hardly  hard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?understandthem.  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\\\"dbetter not believe it.  关于那故事,你最好不要相信。  5. That soundsinteresting.  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 andheavier. 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 arebad. 50%的苹果都坏了。  Twenty percent of the meat is inthe 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 atall. 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, pay  It 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...  10. however 副词,意为“然而,可是”,表示转折关系,可放在句首、句中、句末。

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