新概念英语第二册21课？《新概念英语》第二册第21课《Mad or not?》围绕被动语态展开，通过机场噪音对居民生活的影响，探讨“是否应该因环境问题迁居”的思辨主题。以下从语法、词汇、思辨能力及学习建议四方面展开分析：一、语法讲解：被动语态的核心用法本课通过对比主动与被动语态，强调被动语态在特定语境中的表达效果，那么，新概念英语第二册21课？一起来了解一下吧。
Lesson 21
Mad or not?
是不是疯了？
课文详注 Further notes on the text
1．I live near an airport and passing planes can be heard night and day. 我住在一个机场附近，过往飞机日夜不绝于耳。
（1）passing 是现在分词，作形容词用，表示“经过的”、“过往的”：He stopped a passing car.
他挡住了一辆过往汽车。
He forgot the man with passing time.
随着时间的消逝，他忘掉了那个人。
（2）night and day是固定短语，意为“日日夜夜”、“夜以继日”：He thought of the matter night and day.
他日夜在想这个问题。
He worked night and day.
他夜以继日地工作。
2．The airport was built years ago, but for some reason it could not be used then. 机场是许多年前建的，但由于某种原因当时未能启用。
新概念英语第二册Lesson 21深精讲解与背诵指导
一、深精讲解
课文标题：
Mad or not：这是一个并列的两个形容词短语，表示“疯了还是没疯”。标题简洁明了，直接提出了文章要探讨的主题。
Why do people think the writer is mad?
特殊疑问句：由特殊疑问词why引导，why在本句中作状语。句子结构为“疑问词+一般疑问句结构”，即“why do people think (that) the writer is mad”。
主谓宾状结构：主语是名词people，谓语是think，宾语是从句“the writer is mad”，从句是主系表结构，主语是the writer，系动词是is，表语是形容词mad。
Aeroplanes are slowly driving me mad.
主系表状结构：主语是名词aeroplanes，谓语是系动词are，表语是现在分词短语driving me mad，其中me作driving的逻辑宾语，mad作me的补语，状语是slowly。
Aeroplanes are slowly driving me mad。 Last year, The airport came into use. I have been offered a large sum of money to go away, but I am determined to stay here.Everybody says Iam mad and they are probably right.
人们认为作者疯了是因为作者拒绝了一大笔钱，坚持住在机场附近噪音极大的地方。具体原因如下：
机场噪音严重：作者住在机场附近，过往飞机日夜不绝于耳。机场虽多年前已建好，但直到去年才开始使用，自使用以来，噪音问题严重，过百人因噪音弃家而去，而作者是少数留下的人之一。
作者有被飞机撞倒房子的担忧：由于飞机频繁飞过，作者有时甚至觉得这房子就要被一架飞过的飞机撞倒，这种担忧在常人看来可能有些过度。
拒绝高额搬家费：有人向作者提供一大笔钱让其搬走，面对这样具有吸引力的经济补偿，作者却坚定地决定留在这儿，不接受这笔钱搬离这个受噪音困扰的地方。
以下是《新概念英语》第二册第21至25课的课文背诵内容：
Lesson 21 Mad or not? 是不是疯了？
烦恼起因：Aeroplanes are slowly driving me mad. I live near an airport and passing planes can be heard night and day.
机场历史：The airport was built during the war, but for some reason it could not be used then. Last year, however, it came into use.
邻居离开：Over a hundred people must have been driven away from their homes by the noise. I am one of the few people left.
坚持留下：Sometimes I think this house will be knocked down by a passing plane. I have been offered a large sum of money to go away, but I am determined to stay here.
他人评价：Everybody says I must be mad and they are probably right.
Lesson 22 A glass envelope 玻璃信封
意外来信：My daughter, Jane, never dreamed of receiving a letter from a girl of her own age in Holland.
漂流瓶故事：Last year, we were travelling across the Channel and Jane put a piece of paper with her name and address on it into a bottle. She threw the bottle into the sea and never thought of it again.
回信到来：Ten months later, she received a letter from a girl in Holland.
通信方式调整：Both girls write to each other regularly now. However, they have decided to use the post-office. Letters will cost a little more, but they will certainly travel faster.
Lesson 23 A new house 新居
姐姐来信：I had a letter from my sister yesterday. She lives in Nigeria.
访英计划：In her letter, she said she would come to England next year. If she comes, she will get a surprise.
房屋背景：We are now living in a beautiful new house in the country. Work on it had begun before my sister left, and the house was completed five months ago.
邀请同住：In my letter, I told her she could stay with us. The house has many large rooms, a lovely garden, and is very modern—so modern that it looks strange to some people. It must be the only modern house in the district.
Lesson 24 It could be worse 不幸中之万幸
酒店丢钱：I entered the hotel manager's office and sat down. I had just lost $50 and felt very upset. "I left the money in my room," I said, "and it's not there now."
经理同情：The manager was sympathetic but could do nothing. "Everyone's losing money these days," he said.
意外转机：He started to complain about the wicked world but was interrupted by a knock at the door. A girl came in and put an envelope on his desk containing $50. "I found this outside this gentleman's room," she said.
感慨："Well," I said to the manager, "there is still some honesty in this world!"
Lesson 25 Do the English speak English? 英国人讲的是英语吗？
初到伦敦：I arrived in London at last. The railway station was big, black, and dark. I did not know the way to my hotel, so I asked a porter.
沟通障碍：I spoke English very carefully and clearly, but the porter could not understand me. I repeated my question several times before he understood.
回复困惑：He answered me quickly and unclearly. When I said I was a foreigner, he spoke slowly, but I still could not understand him. "My teacher never spoke English like that!" I thought.
最终理解：The porter and I smiled at each other. Then he said something I understood: "You'll soon learn English!"
感触：In England, each man speaks a different language. The English understand each other, but I don't understand them! Do they speak English? I wonder.
以上就是新概念英语第二册21课的全部内容，第一个句子：主谓状结构，主语I，谓语动词是live，状语是near an airport。第二个句子：主系表状结构，主语是动名词短语passing planes，谓语动词是can be，表语是过去分词heard，表示被动（听这个动作不是passing planes发出的），状语是名词短语night and day。内容来源于互联网，信息真伪需自行辨别。如有侵权请联系删除。
