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1、新概念英语第二册第48课课文重难点 Further notes on the text 1Dentists 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，代指后面的不定式，for+人称代词名词说明不定式表示的动作是谁做的：It is not hard for you to help them.你帮助他们并不难。It was a mistake for me to come to the party.我来参加晚会是错误的。
2、impossible通常不以人作主语，而以不定式或从句作主语：It is impossible for him to help you.他不可能帮你。It is impossible that he will help you.（译文同上）2In 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，在这里表示作为对的回答：In answer to my question, Dan shook his head.作为对我的
3、问题的回答，丹摇了摇头。这个短语的另一个含义是响应的请求：In answer to my request, he wrote a letter to George.应我的请求，他给乔治写了封信。（2）made strange noises, 发出奇怪的声音。我并不是有意发出这些声音，而是因为嘴里有药棉，又想回答医生的话造成的。3Meanwhile, my tongue was busy searching out the hole where the tooth had been. 与此同时，我的舌头正在忙着寻找刚拔掉的那颗牙的伤口。（1）副词meanwhile表示在此期间、与此同时：He w
4、ont come until ten oclock. Meanwhile you can have a rest.他10点以前不会来。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。与此同时我却在想着其他事情。（2）search out表示找出、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
5、的是过去完成时，因为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。4When 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可以表示拿去、除去、去掉，通常结构为remove +名词+from；它也可以单独使用：Ive 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2645课的部分语法It is one of th
6、e 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 arent many students who sing as well as she does.在学生当中没几个人唱歌像她那么好。（who在关系从句中作主语，不可省略）People are not so honest as they once were.人们不再像以前那样诚实了。（not so/ asas用于比较状语从句）He had hardly had time to settle down when he sold the hou
7、se.他还没等安顿下来就卖掉了房子。（hardlywhen用于过去完成时）No sooner had I sat down than he came in.我刚坐下他就进来了。（no soonerthan用于过去完成时；否定词位于句首时句子要倒装）The box was so heavy that she couldnt lift it.箱子太重了，她搬不起来。（so+形容词+that表示如此以至于）The thief got such a fright that he dropped the bag.那个小偷吓得把提包都扔了。（sucha+名词+that表示如此以至于）Billy is no
8、t at home at present. Hes at school.比利现在不在家，他在学校。（at+名词的用法）词汇学习 Word study1pull 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.他们把那个重袋子拖到一个房间里。You have to pull hard.你得用力拉。（2）拔，抽：Youve pulled out the wrong teeth!你拔错了牙！He pulled an address book from h
9、is pocket.他从口袋里抽出一本通讯录。2nod（1）vt.,vi. 点头，点头示意招呼：I asked him if he wanted to come and he nodded his head.我问他是否想来，他点了点头。When we meet each other in the office, he always nods at me.我们在办公室见面时，他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.他过去常在上法语课时打瞌睡。As he was very tired,
10、 he nodded over his reading.因为他很累，所以他一边看书一边打盹。练习答案 Key to written exercises1难点练习答案A 1 which 2 denied 3 fetched4 too 5 jobs 6 Oneawho7 past 8 next 9 watching10 continually 11 remarked 12 robbedB (sample sentences)Im sorry to cause you such trouble.Have you ever seen such beautiful pictures before? It
11、s such a nice day that we cant stay indoors!Im 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 doesE 1 out 2 up 3 up
12、4 upaway 5 up 6 out 7 back 8 up with 9 up withF (sample sentences)If you dont stop that noise at once, youll have to go to bed. Im at a loss to know what to do.Its stopped raining at last!Hes very busy and cant accept any more work at present. Ill be at home tonight.2多项选择题答案1c 2b 3c 4b 5a 6c7b 8 b 9
13、 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 最符合课文的真实情况，这也是作者不能讲话的唯 一原因，其他 3 个选择都不是原因，所以只能选 c. 2. b 根据课文第 8-10 行 I suddenly felt very worried,when the dentist at last removed the c
14、otton 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 是作者着急的唯一原因， 其他 3 个选择 都不是他着急的原因，所以选 b. 3. c 只有选 c. cannot 才能使句子同前一句 It is impossible for him to answer.(他是不可能回答的)意义相同,所以 c.是正确 答案.a. might not 与 d .may not 都不符合题目意思.
15、b. could not 时态不对. 4. b 本句是将前一句中表示命令请求的间接引 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，不能表示请求； 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,所以选 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 作相应改变。 b. your brother was, c. your brother is 都不是疑问 句语序，所以都不对。 d. was
16、your brother 语序正确， 但时态不对：间接引 语是过去时，直接引语应该是现在时才正确。只有 a. is your brother 语序和时态都正确，所以应该选 a. 6. c 这是一个疑问句， It likes you , b. Does it a. like you 和 d. Like you 这 3 个选择都意思不通，不符合题目意思，只有 c. Do you like 意思通顺，符合疑问句语序，因此只能 选 c. 7. b 介词 by 后面加动名词可以表示方式。 本 句只能选 b. nodding(点头)，因为它是动名词，可以 放在 by 后面作方式状语。 其他 3 个选择都不
17、能放在介词 by 后面，所以选 b. 8. b 本句需要选一个同前一句中时间短语 for a while (一会儿)意义相同的短语。 quietly (安静地)， a. c. while he spoke to me (当他跟我说话时)，d. for a long time (很久)这 3 个选择都与 for a while 的意义不符。 只有 b. for a short time (短时间)同 for a while 的含义相同，因此选 b. 9. d a. assembly (集会，聚会)，b. gathering (聚 集，收集抽象的东西，如消息等)，c. congregation (
18、聚集，聚合) ， d. collection (收集，收藏如邮票，硬币等)，只有 d 最适合这个 句子，其他 3 个选择都不能与火柴盒连用，所以选 d. 10. a 前一句 I nodded(我点头)表示同意，只有 a. agreed (同意)才是这一动作所表达的含义。 said b. no (说不)，c. shouted (高喊)，d. whispered (耳语) 这 3 个选择都不是 nodded 所表达的含义，所以选 a. 11. b 本句需要选出同前一句中的 Meanwhile(同时)意义相同的词或短语。 a. However(不过，然而)；b. In the mean time(同时)； c. Never the less(尽管如此，不过)；d. Although(虽然)；这 4 个 选择中只有 b.同 Meanwhile 的意义相同，所以选 b. 12. c a. took it off (脱下)，b. took it in (理解)，c. took it out (取出)，和 d. took it up (从事于)4 个选择中只有 c. took it out 同前一 句 He removed the cotton wool from my mouth(他将药棉从我嘴里取出)的含义相同，所 以选 c.