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八年级英语新目标上课本重难点整理Unit 1 Unit 1 How often do you exercise?【知识梳理】 I. 重点短语1. go to the movies=go to the cinema 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 skateboarding 去划板6. (be) in good health =（be）healthy 身体健康7. keep healthy=keep in good health 保持健康8. as for 至于 9. take/do exercise=play/ do sports 锻炼,做运动10. eating habits 饮食习惯 11. the same as 与相同12. once a month 一月一次 13. be different from 不同14. twice a week 一周两次 15. make a difference to 对什么有影响16. how often 多久一次 17. although=though 虽然18. most of the students=most students 大多数学生19. activity survey 活动调查 20. go shopping=do some shopping 购物21. do homework 做家庭作业 22. do housework 做家务事23. junk food 垃圾食物 24. be good/bad for 对有益(害)25. on/at weekends 在周末 26. want to do sth=would like to do sth =feel like doing sth 想要做某事27. want sb to do sth = would like sb to do sth 想要某人做某事28. try to do sth 尽量做某事try doing sth. 试着做某try ones best to do sth. 尽力做某事29. come home from school 放学回家30. of course=certainly=sure 当然31. get good grades 取得好成绩32. help sb (to)do sth 帮助某人做某事，33. help sb with sth 在某方面帮助某人34. a lot of =lots of=many /much 许多，大量的35.as for 至于；关于 36.how many 多少（针对可数名词）37.how much 多少（针对不可数名词）38.of course = sure 当然；确信 39.every day 每一天40.every night 每晚 41.hardly ever 几乎不42.be good for ones health 有益健康 43.try to do sth. 尝试做某事44.kind of 有点II. 重要句型1 How often do you exercise? 你多久锻炼一次？2 Three to six times a week 每周三到六次3 How long do you sleep every night? 你每天睡几个小时？4I sleep more than 5 hours every night 多于5小时5. How often do you eat fruit and vegetables? 你多久吃一次水果和蔬菜？6What do you usually do on weekends？你周末通常做什么？7I usually play soccer 我通常踢足球8What is your favorite program？你最喜欢的节目是什么？9Some students are very active，they exercise every day一些学生非常的活泼，每天都运动.10As for homework，most students do it every day关于作业，大多数学生每天都做.III. 交际用语询问别人做某事的频繁程度IV. 重要语法频率副词一For about three years大约三年. (2)how soon意为“多久以后”.多用于将来时间，其答语为in+一段时间.How soon will your mother come back?你妈妈多久以后回来?一She will be back in ten minutes她十分钟以后回来. (3)how many times意为“多少次”，它只询问次数，即“多少次”.常用once一次,twice两次，three times三次等回答.一How many times did you get to Beijing?你去北京几次了?Oh，four times哦，四次了. (4)how far意为“离多远”，多用来询问路程.How far is it from your school to your home?你家距离学校有多远?【易混辨析】house, family ,home (1)house一般指所居住的建筑物，即“房子，住宅”.His house was burned in a big fire他的房子在一场大火中被烧毁了.(2)family着重指家庭成员. My family are au here我们一家都在这儿. (3)home则指某人出生及生活的环境，包括住处及家人. He left home at the age of 18他18岁离开了家. 4.try try to do sth试图做某事，想要做某事 try ones best竭尽所能 She tries to learn English她试着去学英语. Jack tries his best to win the game杰克尽他最大的努力去赢这场比赛. 5. a lot of, many, much 三者都可表示“许多”，a 10t 0f既可修饰可数名词，也可修饰不可数名词；many修饰可数名词复数；much修饰不可数名词.We have a lot of friends-We have many friends我们有许多朋友.Do you have a lot of money?=Do you have much money?你有许多钱吗?在修饰可数名词复数时，a lotlots of可与many互换；在修饰不可数名词时，alotlots of可与much互换.但a lotlots of一般不用于否定句和疑问句中，在这两类句子中要用many或much.6.kind of kind of后接形容词或副词，意为“有点，有几分”.He felt kind of tired他感觉有点累.The like is kind of expensive那辆自行车有点贵.(1)a kind of+ m一种This kind of question is hard to answer这种问题很难回答.(2)all kinds+n各种各样的There are all kinds of flowers iIl the park公园里有各种各样的花.(3)different kinds of+n不同种类的There a地different kinds of animals in the zoo.动物园里有不同种类的动物.7Maybe ,perhaps, likely possible, probablymaybe. perhaps和probably都有“也许，大概”的意思.perhaps也许，大体和possibly同义；probably大概，肯定的成分较大，是most likely的意思；possibly可能，常和call，may，must等情态动词连用，比probably语气弱得多；maybe或许，比perhaps普通，但不庄重；likely或许，通常与most，very连用.8although , though although和though作连词用，意为“尽管，虽然”，二者可以通用.AlthoughThough they are so poor ,they have enough to eat他们虽然穷，食物还是够吃的.注意：在一个句子中，用了although或though就不能用but了，用了but则不能用although或though，即：“虽然但是”不见面，但是可以用yet.9hard, hardly hard既可作形容词，也可作副词，其词义丰富；hardly是具有“几乎没有，几乎不”这种否定含义的独立副词.ms ground is too bard to dig这块地太硬，挖不动.(adj)Chinese is hard t0 learn for foreigners对于外国人来说汉语很难学.(adj.)You should study hard你应该努力学习.(adv)There is hardly any coffee left几乎没剩下什么咖啡了.(adv)Hardly anybody came几乎没有什么人来. (adv)【中考连线】一Do you have any plans for your summer vacation？ 一I am _for London next Sunday Agoing to Bleaving C. will go 答案：B点拨：leave for意为“动身去某地”，故选B.(2009浙江湖州中考)-_do you visit your uncle? -Once a week, at least AHow long B How many CHow often D How soon 答案：C点拨：本题考查疑问词的用法.由答语“至少一周一次”可知用how often how long “多久”；how many多少”；how soon多久”.(2009淄博中考)-Would you mind _my little sister while III away? -Of course not Alooking for B. looking at C. looking after D. looking forward to 答案：C点拨：由题意“当我不在时，你介意照顾一下我妹妹吗?”知选looking after.2009河北中考)-_can you be ready ，Andy? 一In ten minutes. AHow much BHow often CHow long D How soon 答案：D点拨：how much多少提问不可数名词或价格； How often多久一次；how long多久，多长；how soon多久，用于将来时态.由答语in ten minutes“在l0分钟之后”知选D.Unit 2 Whats the matter?【知识梳理】 I. 重点短语1. have/ catch a cold=have got a cold 感冒2.a sore back/throat 背(咽喉)痛3. have a stomachache 胃痛4. lie down and rest 躺下休息5. see a dentist 看牙医6. drink lots of water 多喝水8. a good idea 好主意.9. stressed out 筋疲力尽10. a healthy lifestyle 健康的生活方式11. traditional Chinese doctors 传统中医医生12. a balance of yin and yang 阴阳调和13. too much yin 阴气太盛14. a balanced diet 饮食平衡15. healthy/yin/yang food 健康(阴性，阳性)食品16. at the moment = now 此刻17. enjoy oneself = have a good time =have fun=have a wonderful time 玩得高兴,过得愉快19. host family 寄宿家庭20. conversation practice 会话练习21. enjoy doing sth. 喜欢做某事，II. 重要句型 1.like doing sth 喜欢做某事，2. practise doing sth. 练习做某事,3. mind doing sth. 介意做某事，4. finish doing sth. 完成某事,5. give up doing sth. 放弃做某事,6. keep doing sth. 坚持做某事.7.cant stand doing sth.忍不住做某事8. have fun doing sth. 做某事很愉快即：practice, mind, finish, give up, keep, cant stand, havefun等与enjoy用法相似。III. 交际用语询问别人如何感觉A: Whats the matter?(怎么了？)B: Im not feeling well.(我感觉不舒服。)I have a cold.(我感冒了。)A: When did it start?(什么时候开始的？)B: About two days ago.(大约两天前开始的。)A: Oh, thats too bad.(哦，这很糟糕。)You should lie down and rest.(你应该躺下休息。)B: Yes, I think so.(是的，我是这么认为的。)A: I hope you feel better soon.(祝你早日康复。)IV. 重要语法情态动词【课文解析】 You must do the work with more care你工作要再细心些。Maybe与may be maybe连在一起是副词，意为“可能，也许，大概”，在句中作状语，通常置于句首，也可以放在谓语动词之前；may be分写是“情态动词+动词原形”的形式，在旬中作谓语。 一Is that true?那是真的吗? 一Maybe，Im not sure也许(可能)是，我说不准。 He may be eighteen他可能18岁了。 Maybe your book is at home也许你的书在家里。 The book may be in the desk那本书可能在课桌里。 I am not feeling well.我觉得不舒服。 Im not feeling well是病人回答医生或回答他人询问病情时常用的回答方式之一，意为“我感到不舒服”。I am not feeling well也可以说成I dont feel well8类似的答语还有：I feel terrible我感到不舒服。I feel m我感觉生病了。I feel even worse我感到更糟糕了。feel在该句中为系动词，意为“觉得，感觉”。He feels comfortable他觉得很舒服。I feel coldhungry我感到9觉得饿。start to do和start doing都表示“开始做某事”，但是在以下三种情况中用start to do而不用start doing。(1)主语是物而不是人时。The ice started幻melt冰开始融化了。(2)start本身为-ing形式时。He is just starting to write the letter他刚刚开始写那封信。(3)其后的动词与想法、感情有关时。She started to understand it她开始明白这件事。Thats too bad是人们对于对方或者自己的不幸、不理想的结果抱有可惜的一种感情流露，意为“太可惜(糟糕，不幸)了。”通常用于口语中。 Thats too badI cant catch the trainI have to go there tomorrow太糟糕了，我赶不上火车了，我只好明天去那里了。一I failed the exam again this time这次考试我又没及格。Thats too badYou should work harder at your lessons真可惜，你应当更加努力地学习功课。so常常与动词、形容词等连用，以避免重复。常用的动词有say，speak，tell，hope，believe，do等；形容词有afraid等。一I failed the math examReally?我数学考试没有及格，真的吗?一Im afraid so恐怕是这样。其形容词是ill(病的，生病的)，其反义词是health(健康)。illnesses of children儿童所得的各种疾病Some children are away from school because of illness一些孩子因病不能来上学。advice是名词，表示“建议”，属不可数名词。Please give us some advice请给我们出些主意。She gave me some advice on how to learn English她向我提出了如何学习英语的建议。take sbs advice接受某人的建议ask for sbs advice征求某人的意见healthy与health二者词性不同，因此用法就不同。(1)health为名词，意为“健康(状态)”，其反义词是i11ness。通常作宾语。She is in good health她身体健康。Drinking milk is good for your health喝牛奶有益于你的身体健康。(2)healthy是形容词，意为“健康的”，其反义词是unhealthy。在句中作定语或表语。My wife had a healthy baby just now我太太刚生了个健康的宝宝。Too much， much too与too many 三者均是含有副词too的短语，但其用法不同。(1)too much和much too样子很相似，但是用法不同。Too much后接不可数名词，意为“太多”；much too后跟形容词或副词，意为“太”。There is too much noise in the classroom教室里太吵。The book is much too dear这本书太贵。(2)too many的中心词是many，too是修饰语，因此该短语是形容词短语，常用来修饰名词复数。There are too many old books in the library图书馆里旧书太多。Also, too与either三者都表示“也”。但是用法有区别。(1)too用于肯定句，置于旬末，前面加逗号；也可以用在句中，前后都加逗号。(2)also含较庄重的色彩，通常置于be等助动词后，实义动词前。He likes English，too=He，too，likes English他也喜欢英语。She is rich，and she is also selfish她很富有，也很自私。She also learns English她也学英语。(3)either用于否定句，置于句末，并用逗号隔开。He is not there，either他也不在那儿。For example 与like(1)for example意为“例如”，作插入语，用逗号与句子隔开，可置于句首、句中或句末。Tom is a good beyFor examplehe often helps Granny Li do housework汤姆是个好男孩。比如他常帮李奶奶做家务。(2)like也常用作举例，但其后常接名词或代词。Some warm-blooded animals，like the cat and the dog，dont need to hibernate一些温血动物，像猫和狗，不需要冬眠。Eating Dangshen and Huangqi herbs is alos good for this.吃党参和黄芪也对此有好处。 此句中的Eating Dangshen and Huangqi herbs作主语，是动名词短语，谓语动词需要用第三人称单数形式，故be动词用is。 stressed out是一个形容词短语，此处作表语。stressed由动词stress而来，它是8tress的过去分词，stress意为“加压力”。 在英语中，有部分动词的过去分词已演变为形容词，常见的如：interest(使感兴趣) interested，worry(担忧) wortied，relax(放松)relaxed，excite(使兴奋)-excited，lose(丢失)-,lost，amazing(使惊奇)-,amazed。这类形容词往往用来说明人的情绪。We are relaxed on weekends周末我们可以放松一下。They Were amazed to hear the news听到这消息他们很惊讶。The children were very excited when they。aw so many animals in the zoo在动物园里看到如此多的动物，孩子们十分兴奋。这是由and连接的并列句，在两个句子中，都用Its+adj+to do sth句型，意为“做某事是的”。It是形式主语，to do sth真正的主语。若表示“某人做是的”，则用Its+adj+for sb+to do sth Its dangerous to play on the read在马路上玩耍是很危险的。 这几个词均为名词的修饰语，用来表示名词的量，但含义有所不同。(1)few修饰复数名词，具有否定意义。The animal is ugly，and few people like it这个动物很丑，几乎没有人喜欢它。(2)a few用来修饰复数名词，意为“几个，数个”，具有肯定意义。There are a few elephants in the zooThey are so big动物园里有几头大象，它们真大。(3)little具有否定意义，意为“很少，几乎无”，用来修饰不可数名词。There is little milk in the glass杯子里几乎没有牛奶了。(4)a little具有肯定意义，意为“一些”，用来修饰不可数名词。I call speak English wellbut I Can speak a little Japanese我英语说得很好，但日语仅会讲一点儿。 情态动词有自己的词汇意义，但不能独立作谓语，只能和其他动词一起构成谓语，表示说话人对所说的话的态度和看法。情态动词后跟动词原形，无人称和数的变化。那儿看见他了。5need主要用在否定旬和疑问句中，表示“必要”。You neednt take anything with you.你们不必带任何东西去。 6have to表示由客观条件决定而不得不做某事，意为“必须。不得不”。与其他情态动词不同的是：在一般现在时中，它有人称和数的变化，而在否定、疑问结构中，使用助动词does或do。We have to stay at home todaybecause its raining so hard因为雨下得这么大，今天我们只好待在家里了。The girl has to walk to school every day这个女孩每天得步行去上学。【中考连线】Unit 3 What are you doing for vacation?【知识梳理】 I. 重点短语1. spend time with friends 和朋友们一起度过时光2. a sports camp 运动野营3. how about= what about 怎么样4. go camping 去野营,go shopping 去买东西go swimming 去游泳go boating 去划船go skating 去溜冰go walking 去散步go climbing 去登山go dancing 去跳舞go hiking 去徒步远足go sightseeing 去观光go bike riding 骑自行车旅行go fishing 去钓鱼5. do some shopping 买东西do some washing 洗衣服do some cooking 做饭,do some reading 读书do some speaking 训练口语6. how long 1) 多长时间 (询问动作在时间上所延续的长度)2）多长 （询问事物的长度）7. show sb. sth. = show sth. to sb. 出示某物给某人看give me the book=give the book to me 给我书,pass me the cup=pass the cup to me 把杯子递给我,sell me the house=sell the house to me 把房子卖给我buy me a book =buy a book for me 给我买书,make me a cake=make a cake for me 给我做蛋糕8. get back=come back 回来9. take walks=go for walks 散步10. think about 考虑11. decide on= decide upon 决定计划12. something different 不同的事情13. a great/exciting vacation 愉快的(令人激动的)假期14. cant wait to do sth. 等不及做某事15. a famous movie star 著名的影星16. ask sb. about sth. 向某人询问某事17. forget to do sth. 忘记要做某事forget doing sth. 忘记做过某事II. 重要句型 be going to do sth. 将要去做某事sound + adj. 听起来（加形容词）sound like + n. 听起来像（加名词）have a good time = have fun = enjoy oneself 玩得愉快show sb. sth. = show sth. to sb. 把某物给某人看want to do sth. = would like to do sth. 想要做某事plan to do sth. 计划做某事spend sometime in doing sth. 花时间做某事need to do sth. 需要做某事ask sb. about sth. 询问某人某方面的事情go shopping 去购物leave for 离开去某地III. 交际用语 What are you doing for vacation?Im spending time with my friends.When are you going?How long are you staying?Were staying for two weeks.IV. 重要语法用现在进行时态表示一般将来时态【课文解析】 What are you doing for是一个现在进行时表将来的句子，用来询问将来的计划、打算等。回答时也用现在进行时形式，表示计划，打算要做的事。What are you doing for your vacation?你打算假期做什么?一Im going sightseeing我要去观光。一What is he doing this weekend?这个周末他打算做什么?Your answer sounds tight你的答案听起来正确。This sounds like a good idea这听起来像个好主意。连系动词大多有自己的含义，但不能独立作谓语，只能和表语一起构成谓语用来说明主语的状况、性质、特征等。常见的连系动词有be，look(看起来)，feel(感到)，get(变得)，be come(变得，变成)。I feel very happy today with you今天和你们在一起，我感到很高兴。Your mother looks young though she is about fifty你妈妈虽然大约50岁了，但她看起来很年轻。Hike v&n 远足，徒步旅行 hike既是名词，又是动词，表示“徒步旅行”，go hiking意为“去远足”。 Well have a hiking during the holiday假期我们将去远足。He wants to hike the Himalayas他想去喜马拉雅山区远足。 这是一个省略句，用于向对方询问前面已经提到或询问过的事情。How about playing tennis?打网球怎么样?How about与What aboutHow about(英)和What about(美)都用来征求意见或表示询问，其后接名词、代词或动词的-ing形式。一It often rains常下雨。Forget v后跟名词、代词、动词不定式和-ing形式。1 wont forget him我永远不会忘记他。 forget意为“忘记”，其后接动词有两种形式，即动词不定式和动名词形式，但二者意义及用法完全不同。forget to do sth忘记要做做某事(事情没做)forget doing sth忘记做过某事(事情已经做过了)Dont forget to close the window when you leave the classroom当你离开教室的时候，别忘了关窗户。(还没关)Ill never forget meeting schoolmaster for the first time我永远也不会忘记第一次见到我们校长时的情景。(已经见过了)与forget有同样用法的还有remember(记得，记住)，即remember to do sth意为“记得要做某事”(还没做)，remember doing sth意为“记得做过某事”(已经做完了)。Remember to get to school on time记得按时到校。(还没到校)I remember finishing it我记得做完了。(已经完成了)forget和remember后面也可以接宾语从句。I forget where I put it我忘了把它放哪儿了。forget有“遗忘”的意思，但要表达“把某物忘(落)在某地”，不能用forget，而要用动词leave，即leave +sth+地点。OhDear！ I left the keys in my office!哦，天啊!我把钥匙落(忘记)在办公室了!leave是动词，意为“离开”，其过去式是left。When did you leave Changchun?你什么时候离开长春的?leave for sp动身去某地leave spfor sp离开某地去某地leave sthsp把某物忘在某地I should leave我该离开了。He left for Qingdao yesterday昨天他动身去青岛了。Shes leaving Jinan for Beijing她打算离开济南去北京。I left my book at home我把书忘在家里了。hope既可作动词，也可作名词，表示“希望”。I hope she will come tomorrow我希望她明天会来。hope与wish hope通常用来表示一种相信可以达到的“希望”；wish通常用来表示一种不易达到的“愿望”，或这种愿望并未想到有无可能性。I hope that 1 will see you again我希望能再次见到你。1 wish I could ny like a bird但愿我能像鸟儿一样飞翔。 与hope常构成的三种句型：(1)hope for stll希望Everyone hopes for a good grade大家都盼望有个好成绩。(2)hope to do sth希望做I hope to visit Beijing this week我希望这周可以参观北京。(3)hope that希望I hope that you will finish the work tomorrow我希望你明天能完成这项工作。一般将来时表示将来的动作或存在的状态，主要有三种表达形式，即be doingbe going t0 do及willshall do三种形式，大多数情况下可以互换，但也有区别：1用现在进行时be doing的形式表达一般将来时，特点是：come，go，leave，arrive，fly等动词用现在进行时描写行程安排，通常表示将来要发生的动作。He is coming tomorrow他明天要来。Tom is flying to Beijing next week汤姆下周乘飞机去北京。除了上述几个动词外，可用现在进行时表示将来的动词常见的有：start，g0，work，sleep，stay，play，do，have等。(1)be+ doing也是现在进行时的表现形式，那么如何区分be+ doing是表示进行时还是将来时呢?一般来说，be+ doing若表示进行的动作，常有表示具体时刻的句子(如：Its six in the morning)或祈使句等。 Its seven in the morningThe Greens are having breakfast现在是上午7点，格林一家正在吃早饭。Be quiet，pleaseMy father is sleeping in the loom请安静，我爸爸正在房间里睡觉。-What are you doing now?你在千什么?一Im watching TV我在看电视。(2)若表示动作将要发生，句中常有一些表示将来的时间状语，如；tomorrow，next week(month，year)等。Im going shopping tomorrow afternoon明天下午我要去购物。They are coming to my birthday party next Sunday下星期天他们会来参加我的生日晚会。(3)不论be+ doing表示的是动作正在进行还是将要发生。在没有标志的情况下，可根据上、下文去理解。一Where is Lily? 莉莉在哪儿? 一She is reading in her room,她正在房间里看书。(现在进行时)一Where is he going?他要去哪里?一Hes going to the library他要去图书馆。(一般将来时)2用be going to do的形式表达将要发生的事，强调计划、打算、决定要去做某事。He is going to buy some fruit this afternoon他打算今天下午去买些水果。3用will do或shall do(主语为第一人称IWe)的形式表达一般将来时，will，shall意为“将要，要”，强调要发生的事或可能要发生的状况，时间状语可远可近。I think it will rain tomorrow我想明天会下雨。Some day I willshall go to London to have a look总有一天我会去伦敦看看。Unit 4 How do you get to school?【知识梳理】 I. 重点短语1. get to school 到校 2. ride a bike 骑自行车3. take the subway 乘地铁 4. take the train 乘火车5. take a bus 乘公共气车by bus 6. take a taxi 乘出租车7. walk to school 走到学校 8. how far 多远9. bus station 公共气车站bus stop10. have a quick breakfast 匆匆吃过早饭11. leave for前往 12. the early bus 早班13. the bus ride 公共气车之行 14. at about six-thirty 在大约六点半15. around the world 全世界 16. North America 在北美 17. means of transportation 交通方式18. a number of 许多的/ the number of 的数量19. on weekends 在周末 20. be ill in the hospital 生病住院21. a map in Chinese 中文地图 22. speak Chinese 讲汉语23. thank you so much 这样感谢你24. dont worry 不要担心II. 重要句型询问两地的距离用 how far 引导特殊疑问句回答用 be + (distance) + away + from 的结构。A: How do you get to school?(你如何去上学？)B: I take the subway.(我乘地铁去上学。)A: How far is it from your home to school?(从家到学校多远？)B: Its three miles.(有三英里远。)A: How long does it take you to get from home to school?(从家到学校需要花多长时间？)B: It takes 25 minutes.(要花 25 分钟。)Doing sth. takes sb. some time/ money.=It takes sb. some time/money to do sth.=sb. spends some time/money (on sth.).=sb. spends some time/money (in) doing sth. =sth. costs sb. some time/money.=sb. pay some money for sth.某人花费多少金钱/时间做某事III. 交际用语当谈论如何到达某地等交通方式的时候IV. 重要语法询问别人做某事的方式其回答有多种方式，其中一种结构是 by doing sth. 或 by sth. 的结构。【课文解析】 How do you get to是用来询问对方如何到达某地的常用询问方式，常用回答方式如：I walk to schoo1I get to school on foot我步行到校。I ride my bike to schoo1I get to school by bike我骑自行车到校。I take the bus to schoo1I get to school by bus我乘公共汽车到校。I take the subway to schoo1I get to school by subway我乘地铁到校。I take the train to schoo1I get to school by train我乘火车到校。I take the car to schoo1I get to school by car我坐小汽车到校。How about you?用于征询意见，提起反问，意为“你呢?”。I go to school by carHow about you?我坐小汽车上学。你呢?get是不及物动词，意为“到达”。表示“到达某地”时，常与介词to搭配。They got to the station at six this morning他们今天早晨6点钟到达了车站。 (2)表示时间的其他名词还有：second秒，day天，hour小时，week周，month月，year年。15分钟为一刻，15 minutes= a quarter30分钟为半小时，30 minutes=half an hourhow long用来提问一段时间，it代替不定式作形式主语时，本身无意义；take在该句型中，意为“花费占用(时间)”。How long did it take you to do your homework last night?昨晚做作业花了你多长时间?一About an hour大约1小时。It takes my sister fifteen minutes to have breakfast姐姐用15分钟吃早饭。(1)take主要指花费时间，主要用于It takes sbsome time to
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