新概念英语第二册第48课课文重难点 Further notes on the text 1．Dentists always ask questions when it is impossible for you to answer. 牙科医生们总是在你无法作出回答的时候向你提出问题 在when引导的时间状语从句中，it为先行主语，代指背面的不定式，for+人称代词／名词阐明不定式表达的动作是谁做的： It is not hard for you to help them. 你协助她们并不难 It was a mistake for me to come to the party. 我来参与晚会是错误的 impossible一般不以人作主语，而以不定式或从句作主语： It is impossible for him to help you. 她不也许帮你 It is impossible that he will help you. （译文同上） 2．In answer to these questions I either nodded or made strange noises. 作为对这些问题的回答，我不是点头，就是发出奇怪的声音。
（1）in answer to为固定短语，在这里表达"作为对……的回答"： In answer to my question, Dan shook his head. 作为对我的问题的回答，丹摇了摇头 这个短语的另一种含义是"响应……的祈求"： In answer to my request, he wrote a letter to George. 应我的祈求，她给乔治写了封信 （2）made strange noises, 发出奇怪的声音"我"并不是故意发出这些声音，而是由于嘴里有药棉，又想回答医生的话导致的 3．Meanwhile, my tongue was busy searching out the hole where the tooth had been. 与此同步，我的舌头正在忙着寻找刚拔掉的那颗牙的伤口 （1）副词meanwhile表达"在此期间"、"与此同步"： He won't come until ten o'clock. Meanwhile you can have a rest. 她10点此前不会来在此期间你可以休息一下 Mary was talking to me about her new dress. Meanwhile I was thinking about something else. 玛丽在和我讲她的新衣服。
与此同步我却在想着其她事情 （2）search out表达"找出"、"查出"、"搜出"等： Have you searched out the books I needed? 你找出我需要的书了吗？ （3）where the tooth had been用的是过去完毕时，由于在描述这件事的时候那颗牙已经不在了牙齿尚在的时间是"过去的过去" 4．When the dentist at last removed the cotton wool from my mouth… 当那位牙医最后将药棉从我嘴中取出时…… remove可以表达"拿去"、"除去"、"去掉"，一般构造为"remove +名词+from"；它也可以单独使用： I've removed that picture from the wall. 我已经把那幅画从墙上拿走了 Please remove your hat. 请摘下你的帽子 语法 Grammar in use 复习第26～45课的部分语法 It is one of the ugliest faces(that) I have ever seen. 这是我见过的最丑陋的头像之一。
that在关系从句中作宾语，可省略） There aren't many students who sing as well as she does. 在学生当中没几种人唱歌像她那么好who在关系从句中作主语，不可省略） People are not so honest as they once were. 人们不再像此前那样诚实了not so/ as…as用于比较状语从句） He had hardly had time to settle down when he sold the house. 她还没等安顿下来就卖掉了房子hardly…when用于过去完毕时） No sooner had I sat down than he came in. 我刚坐下她就进来了no sooner…than用于过去完毕时；否认词位于句首时句子要倒装） The box was so heavy that she couldn't lift it. 箱子太重了，她搬不起来so+形容词+that表达"如此……以至于"） The thief got such a fright that he dropped the bag. 那个小偷吓得把提包都扔了。
such〈a〉+名词+that表达"如此……以至于"） Billy is not at home at present. He's at school. 比利目前不在家，她在学校at+名词的用法） 词汇学习 Word study 1．pull vt.,vi. （1）拉，拖，牵，扯： I felt someone pulling my arm. 我觉得有人在拉我的胳膊 They pulled the heavy bag into a room. 她们把那个重袋子拖到一种房间里 You have to pull hard. 你得用力拉 （2）拔，抽： You've pulled out the wrong teeth! 你拔错了牙！ He pulled an address book from his pocket. 她从口袋里抽出一本通讯录 2．nod （1）vt.,vi. 点头，点头示意／招呼： I asked him if he wanted to come and he nodded his head. 我问她与否想来，她点了点头 When we meet each other in the office, he always nods at me. 我们在办公室会面时，她总是向我点头打招呼。
（2）vi. 打盹，打瞌睡（常与off连用）： He used to nod off during the French class. 她过去常在上法语学时打瞌睡 As he was very tired, he nodded over his reading.由于她很累，因此她一边看书一边打盹 练习答案 Key to written exercises 1．难点练习答案 A 1 which 2 denied 3 fetched 4 too 5 jobs 6 One…a…who 7 past 8 next 9 watching 10 continually 11 remarked 12 robbed B (sample sentences) I'm sorry to cause you such trouble. Have you ever seen such beautiful pictures before? It's such a nice day that we can't stay indoors! I'm feeling so tired that I shall have to stop work. C 1 He had no sooner come home than they rang him up from the office. 2 The plane had no sooner taken off than it returned to the airport. D 1 made 2 do 3 make 4 do 5 Do 6 make 7 made8 does E 1 out 2 up 3 up 4 up…away 5 up 6 out 7 back 8 up with 9 up with F (sample sentences) If you don't stop that noise at once, you'll have to go to bed. I'm at a loss to know what to do. It's stopped raining at last! He's very busy and can't accept any more work at present. I'll be at home tonight. 2．多选题答案 1c 2b 3c 4b 5a 6c7b 8 b 9 d 10 a 11b 12 c新概念英语第二册课后习题答案详解 Lesson 48 1. c 根据课文第 3-4 行 I tried to say something, but my mouth was full of cotton wool 可判断只有 c. There was something in his mouth 最符合课文的真实状况，这也是作者不能发言的唯 一因素，其她 3 个选择都不是因素，因此只能选 c. 2. b 根据课文第 8-10 行 I suddenly felt very worried,…when the dentist at last removed the cotton wool… I was able to tell him that he had pulled out the wrong tooth 可以判断 b. he thought the dentist had pulled out the wrong tooth 是作者着急的唯一因素， 其她 3 个选择 都不是她着急的因素，因此选 b. 3. c 只有选 c. cannot 才干使句子同前一句 It is impossible for him to answer.(她是不也许回答的)意义相似,因此 c.是对的 答案.a. might not 与 d .may not 都不符合题目意思. b. could not 时态不对. 4. b 本句是将前一句中表达命令祈求的间接引 语变成了直接引语（祈使句） 。
a. To rest 是动词不定式，不能做祈使句的谓语； c. Do you rest 是疑问句，不能表达祈求； d. Resting 是动名词也不能做祈使句的谓语； 只有 b. Rest 可以做祈使句的谓语,因此选 b. 5. a 本句是将前一句中的间接疑问句...how my brother was 变成直接疑问句， 因此时态和语序都要 作相应变化 b. your brother was, c. your brother 。