初二英语上册：Unit 2 重要知识点整理.docx

【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 times3. 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 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）【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 students15. 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 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. a few / few / a little / littlePeople can live to 100, but few people can live to 150.There is little time left. I wont catch the first bus.Could you give me a little milk?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.Its raining hard. The people can 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，youd 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 isnt 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 play computer 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.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。