2022年新人教版七级英语下册各单元知识点汇总.pdf

上传人:Q****o 文档编号:14243589 上传时间:2022-05-03 格式:PDF 页数:26 大小:263.93KB
返回 下载 相关 举报
2022年新人教版七级英语下册各单元知识点汇总.pdf_第1页
第1页 / 共26页
2022年新人教版七级英语下册各单元知识点汇总.pdf_第2页
第2页 / 共26页
点击查看更多>>
资源描述

《2022年新人教版七级英语下册各单元知识点汇总.pdf》由会员分享,可在线阅读,更多相关《2022年新人教版七级英语下册各单元知识点汇总.pdf(26页珍藏版)》请在taowenge.com淘文阁网|工程机械CAD图纸|机械工程制图|CAD装配图下载|SolidWorks_CaTia_CAD_UG_PROE_设计图分享下载上搜索。

1、20XX年人教版七年级英语下册各单元知识点汇总Unit 1 Can you play the guitar ?1. can+动词原形,它不随主语和数而变化。(1)含有 can的肯定句:主语 +can+谓语动词的原形 +其他。e.g. He can play the guitar.(2)变一般疑问句时,把can提前: Can+主语+动词原形 +其他?e.g. Can he play the guitar?肯定回答: Yes, 主语+can。否定回答: No,主语+cant.e.g. Yes, he can./ No, he cant.(3)含有 can的否定句:主语 +cant+动词的原形 +其

2、他。e.g. He cant play the guitar.(4)含有 can的特殊疑问句:特殊疑问词+can+主语+动词原形 +其他?e.g. What can he do in the club?2. join 参加,加入,指加入党派,团体等组织。join the army/party 参军、入党Join sb. “参加到某人中”join in (doing) sth. “加入做 .,参加某个活动”join in=take part in + 活动,比赛3. 说某种语言: speak+语言e.g. speak Chinese/English 4. play+球、棋、牌; play + t

3、he+乐器。5. 擅长于(做)什么: be good at +名词/动-ing be good with 善于应付,和 . 相处融洽be good for对. 有益be good to 对好6. 帮助某人做某事 :help sb. (to ) do sth. 在某方面帮助某人 :help sb. with sth.7. 想要做某事: want to do sth 想要某人做某事: want sb. to do sth.精品资料 - - - 欢迎下载 - - - - - - - - - - - 欢迎下载 名师归纳 - - - - - - - - - -第 1 页,共 26 页 - - - - -

4、 - - - - - 需要某人 /时间做某事 :need sb./some time to do sth.叫某人做某事 : ask sb. to do sth.教某人做某事 :teach sb. to do sth.让某人做某事: let sb. do sth.8. -What club do you want to join? -I want to join the chess club and the basketball club.9. -What club does Tom want to join? -He wants to join the swimming club .10. H

5、e can t play the violin or the piano. Can you help kids with swimming?11. -Why do you want to join the English club? -Because I want to learn English well.12. go for a swim=go swimming 去游泳13. show sb. sth.=show sth. to sb. 展示某物给某人看Please show some pictures to me.=Please show me some pictures.14. tal

6、k to/with sb.和交谈; talk about 谈论某事15. 交朋友 make friends16. 在周末: on the weekendon weekends/at weekendsUnit 2 What time do you go to school ?1、what time 和 when 引导的特殊疑问句。对时间提问用 what time,也可以用 when。询问钟点时用what time,询问日期、月份、年份时用 when。询问做某事的时间时,两者可以互换。其他询问时间的句子:Whats the time? =What time is it? 现在几点了 ?时刻表达法:

7、顺读法和逆读法。(1)顺读法: “钟点 +分钟”直接读数字。(2)逆读法:借助介词past或to表示,要先说分再说钟点。精品资料 - - - 欢迎下载 - - - - - - - - - - - 欢迎下载 名师归纳 - - - - - - - - - -第 2 页,共 26 页 - - - - - - - - - - A.当分钟不超过30 分钟时(包括30 分钟) ,即30,用 to 表示。译成“差” , 差几分钟到几点。C.当分钟为 30 分钟用 half 表示,当分钟为 15 分钟用 a quarter。2. always 总是usually 通常often 常常sometimes 有时3

8、.watch+TV(电视) 、球赛 “观看, 观赏” ,特指长时间注视。 see+电影、医生; “看见” ,强调看的结果 ; look “看” ,强调看的动作, look 后接宾语时要用介词at。 read+书刊、杂志 “阅读”4.listen to +宾语listen to music听音乐5.take a shower “洗淋浴”6.eat breakfast 吃早餐吃一顿丰盛的早餐eat a good breakfast7.go to +地点名词如:go to school go+地点副词省略 to 如:go home8. I can sing and dance.I can t sin

9、g or dance.9. 起床 get up 穿衣服 get dressed 刷牙 brush teeth10.toothbrush 牙刷;广播节目radio show;广播电台 radio station散步 take a walk/go for a walkUnit 3 How do you get to school?一、重点短语1.get to school 到校2.take the subway 乘地铁3.take the train 坐火车4.leave for 动身去某地leave some place for some place 离开某地去某地5.taketo把带到6. m

10、ost students 大多数学生7. fromto从到8.ride bikes/a bike 骑自行车9.take the train to school 乘火车去上学10.go to school by boat乘船去上学11.on the school bus乘坐校车12.be different from和不同13.one 11 -year- old boy 一个十一岁大的男孩14.两者之间 betweenand.汽车旅程bus ride 注意把 and 换为 or精品资料 - - - 欢迎下载 - - - - - - - - - - - 欢迎下载 名师归纳 - - - - - -

11、- - - -第 3 页,共 26 页 - - - - - - - - - - 火车旅程 train ride地铁旅程 subway ride每天 every day实现,成为现实come true二、重点知识详解1. take +a/an/the+表示交通工具的名词,乘去某地,是动词短语,在句中作谓语。He takes the train to Beijing. take the subway乘地铁 take a walk 散步take a shower 洗淋浴 take a rest休息一会 take a seat 坐下 take some medicine 吃药2. by+表示交通工具的

12、单数名词或on/in+ a/an/the/ones+表示交通工具的单数名词, 是介词短语作方式状语。I get to school by bike. = I get to school on my bike.3. walk/ride/drive/fly+to+ 地点名词,步行 /骑自行车 /开车/坐飞机去某地 ;表示乘交通工具方式可以互换表达相同的意义:take the bus to school =go to school by bus =go to school on a busdrive a car to work=go to work by car=go to work in a ca

13、r fly to shanghai=go to shanghai by plane/air=take the/a plane to shanghai =go to shanghai on a/the plane.4. get表示“到达”,后接名词需加 to,接地点副词不加to.reach 给示到达,是及物动词,其后直接接宾语。arrive in+ 大地点 arrive at + 小地点 后接副词不需介词。5. It takes sb. some money/time to do sth.花费某人时间 /钱做某事sb. pay some money for sth. 某人为某物花费多少钱sb.

14、spend some time/money on sth. 某人在做某事或某物上花费时间/钱sb. spend some time/ money (in)doing sth. sth. cost sb. some money 某物花费某人多少钱6. How far is it from A to B?=How far is B from A?答语有两种:(1)Itsmeters/miles/kilometers(away) 有米 /英里/千米(远)(2)Its about ten minutes walk/ ride.约有十分钟步行 /骑车的路程。7. have to后加动原,侧重客观的需要,

15、有“不得不,被迫”之意,有多种时态形式,否定式为 dont have to (neednt)意为“不必”。must 侧重于说话者的主观看法,认为有必要或有义务做某事,只有现在时一种形式,否精品资料 - - - 欢迎下载 - - - - - - - - - - - 欢迎下载 名师归纳 - - - - - - - - - -第 4 页,共 26 页 - - - - - - - - - - 定式 mustt意为“一定不要,不允许,禁止”反意词为“neednt” 或 dont have to/ doesnt have to。8. dream of /about sb. /sth. 梦见某人、某物dre

16、am of/about doing sth. 梦想做某事9. be afraid of sb./sth.害怕某人、某物doing sth.害怕做某事be afraid to do sth. 害怕做某事10. be like 像 look like 看起来像 like to do/doing sth.11. what do you think of.? = how do you like.? 认为怎么样?12. It is +adj. + for sb.of sb. 当表示事物特征时,如difficult, easy ,important 等,用介词 for; 当表示人物品质时,如good, n

17、ice, kind 等,用介词 of.e.g. It is difficult for you to do math homework.e.g. It is kind of you to dress my sister every morning.三、语法归纳(一) how 引导的特殊疑问句how 引导的特殊疑问句提问交通方式,其答语分四种情况:a. take a/an/the+ 交通工具(单数) to 地点b. 动词 walk/ride/fly/drive+to+ 地点地点副词,省 toc. by+交通工具(单数)d. on/in+限定词 +交通工具how far 用来提问距离,多远,其答语

18、分为两种:(1)用长度单位表示: It is five kilometers.(2)用时间表示: It s twenty minutes walk. how long 用来提问时间,意为多久回答常用“for+段时” 。-How long have you learnt English? (了解即可 ) -For 3 years.-How long does it take you to get to school?-It takes about 20 minutes to get to school.to do sth.精品资料 - - - 欢迎下载 - - - - - - - - - - -

19、 欢迎下载 名师归纳 - - - - - - - - - -第 5 页,共 26 页 - - - - - - - - - - Unit 4 Dont eat in class肯定的祈使句:(1) 实义动词原形 +其他; (do句型)(2) be 动词原形 +形容词 +其他; (be句型)(3) let sb. do sth. (let 句型)否定的祈使句:(1) don t+实义动词 +原形;(2) don t be+形容词 +其他;(3) don t let sb. do sth./ let sb. not do sth. (4) no + V-ing/n.2. 不要迟到: Dont arr

20、ive late. = Dont be late. 上课/上学不要迟到: Don t arrive (be) late for class/school.3. 主语省略(无主语):Dont arrive late for class.主语不省略(有主语) :We can t arrive late for class.4. 在学校我们必须穿校服: We have to wear uniforms at school.句型:不得不 /必须做某事: have to do sth. 否定:不必做某事: dont have to do sth.穿校服:单数: wear a uniform 复数: we

21、ar uniforms5. 在我家里有太多的规矩: I have too many rules in my house.词组:太多: too many6. 我从来没有任何快乐: I never have any fun. (never 译为“从来没有”,表示否定,否定句中表示“任何,一些” ,用 any)have fun玩得开心。 fun 为不可数名词have fun doing sth. 做某事很开心e.g. We have fun learning English.7. 不要大声说话: Dont talk loudly.请大声说: Speak loudly, please.8. pract

22、ice sth./doing sth.练习某事 /练习做某事e.g. I practice playing the piano every day.9. 表示“地点”的词组:(1) 在教室里: in the classroom 在课堂上: in class精品资料 - - - 欢迎下载 - - - - - - - - - - - 欢迎下载 名师归纳 - - - - - - - - - -第 6 页,共 26 页 - - - - - - - - - - (2) 在走廊上: in the hallways 在学校里: at school = in school10. 表示“时间”的词组(1) 下课

23、后: after class 放学后: after school(2) 在上学的白天 /晚上: on school days/nights 11. (1) with 和; 如:He lives in Beijing with my parents. (2) with 戴着;如: Do you know the fat man with a hat? (3) with 带有;如: There is a house with a garden.12. dining hall 餐厅listen to听(be) on time 准时In time 准时do the dishes 清洗餐具be stri

24、ct (with sb.)(对某人)要求严格follow /obey/observe the rules 遵循规则make (one s) bed铺床dining hall 餐厅13. fight with sb. 与某人打架be quiet/keep quiet安静make breakfast做早饭keep one s hair short 留短发make rules制定规则eat outside在外面吃东西go out 外出(娱乐)14. a lot of/ lots of +可数或不可数名词; a lot 修饰动词,非常many/ too many+可数名词复数 much/ too mu

25、ch+不可数名词复数much too修饰形容词或副词Unit5 Why do you like pandas?1. 让我们先去看考拉。- Let s see the koalas first. (first翻译为“首先” )你为什么最喜欢考拉 ? - Why do you like koalas best?-因为它们很可爱。- Because they are very cute.句型:让某人做某事: let sb. do sth. 2. 你为什么不喜欢老虎? - Why don t you like tigers?-因为它们有点吓人。 - Because they are kind of s

26、cary. 在此处,表示“不”,只要在 do 后加 not 即可。 有点: kind of+形容词 = a little+形容词精品资料 - - - 欢迎下载 - - - - - - - - - - - 欢迎下载 名师归纳 - - - - - - - - - -第 7 页,共 26 页 - - - - - - - - - - 3. 你还喜欢别的什么动物?What other animals do you like? ( 后有 animals, other不加 s)你喜欢和别的年轻人工作吗?Do you like to work with other young people?4. 他是一个 8

27、 岁的男孩: He is an 8 -year-old boy. (后有名词 boy, 用连字符, year用原形 )他 8 岁:He is 8 years old. ( 后无名词 boy, 不用连字符,岁数大于1,year变复数 )5. 请保持安静: Please be quiet. = Please keep quiet. 6. 他每天通常睡和放松20 个小时:He usually sleeps and relaxes 20 hours every day.每天: every day (要分开 ) 连在一起的 everyday翻译为“日常的”,是个形容词。7. 和某人玩: play wit

28、h sb. 8. 在白天: during the day = in the day 在此处, during = in9. 在晚上: at night (10 点之后 ) & in the evening(6 点到 10 点)在上学的晚上 /白天: on school nights/days10. 吃草: eat grass 吃叶子: eat leaves (leaf的复数形式 ) 吃肉: eat meat11. 相似单词比较: (1) 草:grass ( 不可数, ) (2) 玻璃: glass 复数: glasses 眼镜12. 汉语:因为,所以英语:because , so (不能同时出现

29、在一个句子中)13. (1) first num. 第一;如:Sunday is the first day of a week.(2) first adv. 首先;首先 ; 如:Let s see the koalas first.14. (1) best adv. 最;如:Why do you like koalas best?(2) best adj. 最好的;如:Who do you think is the best teacher in your class?15. (1) very adv. 非常(放在形容词前)如:The koalas are very cute.(2) ver

30、y much 非常(放在动词后);如: Thank you very much.16. (1) kind n. 种类;类型a kind of :一种different kinds of : 不同种类的many kinds of:许多种类的all kinds of :各种各样的(2) kind of = a little adv. 有点; (无形式变化)如: He is kind of lazy.精品资料 - - - 欢迎下载 - - - - - - - - - - - 欢迎下载 名师归纳 - - - - - - - - - -第 8 页,共 26 页 - - - - - - - - - - (

31、3) kind adj. 和蔼的,友善的如:It s kind of you to help me with my English.17. 树叶: leaf 复数: leaves 变化规则:去 f 为 v 加 es ;Unit 6 I m watching TV .1. 现在进行时的结构:主语 +be+Ving. (be动词和动词 +ing 两者缺一不可 )考题形式: (1) 已知 be动词,考后面的动词形式(要加ing) ;(2) 已知后面的动词 +ing , 则前面用 be动词。如:(1) The boy is _ (run) with his father.(2) Some childr

32、en are _ (lie) on the grass.(3) My brother and I are _ (play) soccer.(4) His sister is _ (read) a book.2. -你正在做什么? - What are you doing? -我正在看电视。 - I m watching TV.3. 那听起来很棒: That sounds great/good.4. 谢谢你的信和照片: Thanks for your letter and the photos. 谢谢某东西: Thanks for sth. 句型:谢谢做某事: Thanks for doing

33、sth.5. 这是我的一些照片: Here are some of my photos. ( “一些照片”是“复数” ,be 用 are)这是我的一张全家福照片:Here is a photo of my family. (“一张照片”是“单数” ,be用is)6. 句型:忙于做某事: be busy doing sth. 如:His brother is busy writing stories in his room.7. 表示“活动”的“动词词组”做家庭作业: do ones homework 打扫房间: clean the room吃晚饭: eat dinner 打电话: talk o

34、n the phone = make a telephone call看书 /看报/看杂志 read books, read newspapers, read magazines (学生)上课: have an English class (老师)上课: give an English class精品资料 - - - 欢迎下载 - - - - - - - - - - - 欢迎下载 名师归纳 - - - - - - - - - -第 9 页,共 26 页 - - - - - - - - - - 举行晚会: have an evening party 和某人说再见: say goodbye to

35、sb.8. 在购物中心: at the shopping center 在游泳池: at the (swimming) pool在学校: at school 在体育馆里: in the gym9. 在第一张照片中: in the first photo 在第二张照片中: in the second photo在下一张照片中: in the next photo 在最后一张照片中: in the last photo 10. 等汽车: wait for the bus 在汽车站等 (某人):wait (for sb.) at the bus stop11. 我的兄弟和我: my brother

36、and I (要把“我”放在后面 )12. (身体)好,健康: well = fine 如:- How is your mother? - She is well/fine13.活动: activity 复数: activities (以辅音字母 +y 结尾的, y 加 ies)玩具 toy 复数: toys (以元音字母 +y 结尾的,直接加 s)14. (1) 也:also 用于“肯定句的句中” ;(2) 也:too 用于“肯定句的句末,前加逗号” ;(3) 也:either 用于“否定句的句末,前加逗号” 。15. (1) show n. 节目;如: TV show, sports sh

37、ow,talk show (2) show v. 给看;Show sb. sth. / show sth. to sb.e.g. Can you show me your family photo?=Can you show your family photo to me? (3) show v. 表演;如: Can you show us Beijing Opera? (京剧)一般现在时The Simple Present Tense一般现在时表示现在的状态;表示经常性或习惯性的动作;表示主语具备的性格和能力等。例如:1、He is twelve. 他十二岁。2、I go to school

38、 at seven every day.精品资料 - - - 欢迎下载 - - - - - - - - - - - 欢迎下载 名师归纳 - - - - - - - - - -第 10 页,共 26 页 - - - - - - - - - - 3、They speak Japanese.一般现在时常和表示时间频度的副词连用。如:often, usually, sometimes, always, never, hardly ever等。1. I often read books in the evening.2. Do they usually go to school by bike?3. H

39、e doesn t like milk. He never drinks it.4. Sometimes my mother gets back at five.一般现在时常和以下时间表达法连用。如:in the morning, in the afternoon, in the evening, at noon, at night, every day, on Sunday(s), at seven 等。Do they have math in the morning?She sleeps nine hours every night.It takes me two hours to do

40、my homework every day.They don t have classes on Sundays.它有三种形式:一、谓语是 be 的一般现在时。1、肯定形式是:主语 +be+表语(形容词、名词充当表语) 。e.g. He is a student2、否定形式是:主语 +be+not+表语(形容词、名词充当表语) 。e.g. He is not a student.3、一般疑问句是: Be+主语+表语(形容词、名词充当表语)?肯定回答是: Yes,主语+be. 否定回答是: No, 主语+ be+not.4、特殊疑问句是:特殊疑问词+Be开头的一般疑问句 ?注意: be要随着主语

41、变化而变化。二、谓语是情态动词can/may.+动词原形的一般现在时。1、肯定形式是:主语 +情态动词 can/may.+动词原形 +宾语。2、否定形式是:主语 +情态动词 can/may.+not+ 动词原形 +宾语。3、一般疑问句是:情态动词can/may.+ 动词原形 +主语+宾语。肯定回答是: Yes, 主语 +情态动词 . 否定回答是: No, 主语+ 情态动词 +not.4、特殊疑问句是:特殊疑问词+情态动词 can/may. 开头的一般疑问句?注意:情态动词 can/may.+ 动词原形。精品资料 - - - 欢迎下载 - - - - - - - - - - - 欢迎下载 名师归

42、纳 - - - - - - - - - -第 11 页,共 26 页 - - - - - - - - - - 三、谓语动词是实义动词的一般现在时。1、肯定形式是:“主语 +及物动词 +宾语”或“主语 +不及物动词”。2、否定形式是:“主语 +dont/doesnt+ 及物动词 +宾语”或“主语 +dont/doesnt+ 不及物动词”。3、一般疑问句是:“Do/Does+主语+及物动词原形 +宾语”或“Do/Does+主语+不及物动词原形”。肯定回答是: Yes, 主语 +do/does. 否定回答是: No, 主语+ dont/doesnt.4、特殊疑问句是:特殊疑问词+do/does开头的

43、一般疑问句?注意:根据主语确定用do 还是 does。动词第三人称单数的构成: (用于第三人称单数、可数名词的单数和不可数名词的一般现在时中)1. 直接加 -slooklooksreadreadsplayplaysstopstops2. 在字母 s, x, ch, sh, o后加-es missmissesfixfixeswatchwatcheswashwashes gogoesdo-does3. 辅音字母加 y 结尾的动词变 y 为 i,再加 -escarrycarries studystudieshurryhurriescrycries4.特殊的have - has 现在进行时(1)构成形

44、式: Be 动词+动词的 ing 形式这里强调一点,两者缺少其中任何一种都不可以构成现在进行时。(2)现在进行时表示动作正在进行或事情正在发生。(3)有用的依据:一个句子中既有be 动词,又有动词,且动词加了ing 该句是现在进行时(4)句中往往有 now、look、listen 等词。动词现在分词的变化:一般情况加ingplay 玩playing do 做doing go 去going jump 跳jumping精品资料 - - - 欢迎下载 - - - - - - - - - - - 欢迎下载 名师归纳 - - - - - - - - - -第 12 页,共 26 页 - - - - -

45、- - - - - sing 唱singing ski 滑雪 skiing see看见-seeing以不发音的 e 结尾 去 e 加ing make做making take 拿到 taking like 喜欢 likingcome来coming write 写writing dance跳舞 dancinghave有having close关closing以重读闭音节结尾的动词,中间只有一个元音字母,词尾有一个辅音字母双写最后一个辅音字母再加 ing swim 游泳 swimming sit 坐sitting run 跑running get 得到gettingput 放putting begi

46、n 开始 beginning shop购物shopping 做题目时一定要记住:can+动词原形like+动词 ing / to do sth. like+名词复数play+足球类 play the +乐器类how many +名词复数would like +to+ 动词原形let s+动词原形现在进行时: be(am,is,are)+ 动词 ing动词第三人称单数形式Unit 7 Its raining!一、重点词汇1. rain-rainy 下雨了cloud-cloudy 多云的wind-windy 多风的snow-snowy 下雪的 sun-sunny 晴朗的fog-foggy 多雾的2

47、. a heavy/ light rain 一场大雨 /一场小雨不及物动词:做饭及物动词:烹饪,煮cook sb. sth. /cook sth. for sb.3. cook 名词:厨师,炊事员cooker : 厨灶,炉具cooking: 名词:烹饪,做饭do some cooking精品资料 - - - 欢迎下载 - - - - - - - - - - - 欢迎下载 名师归纳 - - - - - - - - - -第 13 页,共 26 页 - - - - - - - - - - 4. message: 可数名词,消息,信息常用短语take a message: 捎口信,传话take a

48、message for sb. :为某人捎个口信leave a message: 留口信send a message: 发送信息5. tell :动词,告诉常用短语: tell sb. to do sth. 告诉某人做某事tell sb. not to do sth. 告诉某人不要做某事tell sb. sth. 告诉某人某事tell sb. about sth. 告诉某人关于某事6. visit:(1)及物动词,拜访,探望 +表示人的名词或代词(2)及物动词,参观,游览 +地点名词(3)名词,访问,参观,拜访This is my first visit to China.(4)visitor

49、 : 参观者,旅游者,拜访者7. happy: be happy to do sth. 高兴做某事。(1)形容词:困难的,费力的,坚硬的,艰难的That is a hard question.He lives a very hard life.8. hard (2)副词:努力地,辛苦地,猛烈地Mary is working hard at her English.It s raining hard. 9. work :不及物动词,意为“ (机器)运转;活动” 。e.g. My watch doesnt work. What time is it now? 我的手表坏了。几点了?The TV s

50、et doesnt work. Lets take a walk in the park. 电视机坏了,让我们去公园散步吧。二短语:1. take photos/ pictures 照像精品资料 - - - 欢迎下载 - - - - - - - - - - - 欢迎下载 名师归纳 - - - - - - - - - -第 14 页,共 26 页 - - - - - - - - - - 2. take photos/ pictures of sb./ sth. 给某人或某物照相3. have a good time/have fun+ doing sth. 愉快得做某事4. work for s

展开阅读全文
相关资源
相关搜索

当前位置:首页 > 教育专区 > 高考资料

本站为文档C TO C交易模式,本站只提供存储空间、用户上传的文档直接被用户下载,本站只是中间服务平台,本站所有文档下载所得的收益归上传人(含作者)所有。本站仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。若文档所含内容侵犯了您的版权或隐私,请立即通知淘文阁网,我们立即给予删除!客服QQ:136780468 微信:18945177775 电话:18904686070

工信部备案号:黑ICP备15003705号© 2020-2023 www.taowenge.com 淘文阁