Unit 2预习指导（知识点+练习题）2022-2023学年人教版八年级英语上册

八年级英语上册unit2 预习指导 一、知识点 【重点语法】 l.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） 一How soon wil1 he be back?他多久能回来？ -He wil1 be back in a month.他一个月后能回来。 2)how1ong“多久” 一How long did it take you to clean the house?你打扫房子用了多久？ 一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 T.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 l0.be different from不同 11.once a month一月一次 l2.twice a week一周两次 l3.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 l9.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 fewfew a little little People can live to 100,but few people can live to 150. There is little time left.I won't catch the first bus. Could you give me a little 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” 0 The ground is too hard to dig. I can hardly understand them. It's 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,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。soud(听起来)，1ook(看起来)，smel1(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 ve