青少版新概念Unit 21 新概念2第21课解析
新概念第二册21课
新概念第二册21课第一篇：新概念第二册21课21课上课时间：上课地点：教学用书：新概念二教学目标: 掌握生词和短语①mad，reason，sum，② be mad about/on sth，the reason for sth …理由教学重难点：①determine on sth 决定做某事/determine to do sth ②表“许多”的短语：如a great many + pl.a number of + pl.③come into use，关于knock的短语教学过程:New words and expressions 1.mad adj.发疯的①be mad 发疯，发狂（强调状态）go mad 发疯，发狂（强调转变）drive sb mad 逼疯②be mad about/on sth对…疯狂的，狂热的He is mad on football 他对足球狂热。
2.reason 1)n.原因for this reason 由于这个原因for some resson 由于某个原因(some: 某一个，加可数名词单数)give a reason 提出理由the root reason 根本原因the reason is that… 理由是…the reason why…is that… …的理由是…eg.The reason why I study English is that I envy those who speak English well.我学习英语的理由是我羡慕那些讲英语很好的人。
the reason for sth …理由eg.What’s the reason for your absence? 你缺席的理由是什么？the reason to do sth 做某事的理由eg.Is there any reason to go there? 有去那儿的理由吗？ 2)理性，正常心智eg.Only man has reason.只有人类才有理性。
新概念英语第二册课后习题答案详解Lesson 21
新概念英语第二册课后习题答案详解Lesson 11. b选b最为正确。
因为a.d.都与课文内容不符合，也不合乎逻辑；c.的意思是“他们没有注意他”，而作者的意图并不是想让他们注意他，而是想让他们停止谈话。
所以选b. 最能表达作者当时心里的感受。
2．c其余3个答案都与原句意思不符合。
3．b因为a. to 不对，可以是He went to the theatre;c. into 也不对，可以是He went into the theatre;d. on更不符合语法，表示在某一个地方用介词in 或at, in 表示在大的空间，如国家，城市等，at 则表示在小的地点或空间，如atthe office, at the theatre 等, 所以选b.是正确的。
4．db. above(在……上方)；c. ahead of (在……的前面，在……之前)不和behind 对应，也不强调位置的前后顺序。
a. before 和 d. infront of 都是和behind对应的，都有“在……前面”的意思。
但in front of 更具体的强调位置，而before则包含更宽泛的意思，即时间上，空间，次序，登记，重要性方面的“在……前面”5．c因为用 a. Where, b. why, d. when 提问都不符合逻辑，都不是针对状态提问的，只有How提问，才能用Angry回答。
6．ab. they 只做主语；c. their只能做定语；d. us 虽然可以做宾语，但与前一句意思不符合。
7．da. none是代词，很少用在名词前面；b. any 只能用在否定句或疑问句中；c. not any 不符合语法，因为前面没有助动词did.8.ba. chair(椅子)， c. armchair(手扶椅) d. class(班级) 这3个选择都和seat的意思不符合。
Seat是”座位，座席”的意思。
强调的是可供坐下的地方，不是具体的椅子。
新概念第二册第21课课件PPT Lesson21
there
life a long time ago.
A.must be been
D.could be
knock sb down&knock sth down 她被公交车撞到了 She was knocked down by a bus These old houses will be knocked down 我撞到了一个小孩
drive()驱使,逼迫
drive sb to do=make sb. doHunger drove her to steal
这次经历驱使我学德语
drive sb +adi The noise drives me crazy
考试逼得我很紧张
doing+名词 (主动+进行） falling leaves developing country 一张笑脸 一辆正在疾驰的车
C.might put
D.might have put
Don’t be so worried about that. John A. may leave B. must leave C. could have left D. can have left
a note.
Although there is no life on Mars (火星） now, some scientists think that
(上海27) It
have been Tom that parked the car here,
because he is the only one with a car.
A.may
B. can
C. must
D. should
(天津6)She
新概念青少版2b Unit21
rain [rein] n.雨
gradually [ˌgrædj ʊəlɪ] adv.逐渐地
rise 上升
degrees Celsius 摄氏度
fall [fɔ:l] v.降落, 落下
outlook [‘autluk] n.景色, 景致，展望
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LESSON 42
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move [mu:v] vt. & vi.移动; 搬动
yet [jet] adv.还, 尚, 仍然
last [lɑ:st] adv.最近一次的，延续; 继续；
train [trein] n.列车, 火车；
Pronunciation
Pattern Practice
Listening
There will be There won`t be Will there be a Yes,there will. a computer in a computer in compuer in it. No,there it. it. won`t. They will do heavy work.
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They won`t do heavy work.
Will they do heavy work?
Yes,they will. No,they won`t.
Functional Practise：
C １.Ｉhope that you＿＿ a good time this evening. A.have B.are having C.will have D.has D 2.Look at those big black clouds. It ＿＿ rain.Let`s hurry. A.must B.will C.would D.is going to
新概念英语第二册Lesson21课件
Aeroplanes are slowly driving me mad. 逼迫，迫使 He drives his car very badly. 驾驶，开车 Our army drove the enemy back. 逼迫，迫使
Notes on the text
New words and expressions Text & Key points Grammar
What do we use it for? We use it to type. It is used to type.
What is “be done”?
构成
be + done
Many people speak English.
years前面不加确定的数词时，一般表示“许多年” years ago = many years ago week类似 e.g. I have not seen him for weeks.
Notes on the text
for some reason 由于某个理由
some+ cn单数： 某一 some book some+ cn复数： 一些 some books some+ un ： 一些 some water
➢ drive sb. mad 逼某人发疯
e.g. His new hairstyle drives him mad.
Notes on the text I live near an airport and passing planes can be heard night and day.
night and day 日日夜夜，夜以继日 passing planes 过往飞机
新版 新概念英语二册讲义--21
• go mad
发疯
• = go crazy
• =go bananas
• They are going mad/craze/bananas.
reason n. 原因
• For this reason 因此
由于这个原因；为此，
• For this reason, I was late.Βιβλιοθήκη • reason for…
…的原因
• The reason for the flood was that heavy rain.
• 水灾是那场大雨造成的。
• as+句子
由于……
• because+句子 由于……
• because of +名词或代词
• for + 句子
sum
n. 量
• 总额；总和 • a sum of +不可数名词 一笔…，大量… • 一大笔… • a large sum of …… (large 指数量的大) • 一大笔钱
• 某个幸运儿昨天中了彩票。
• 4. Last year, however, it came into use.
• come into use 启用，开始被使用（没有 被动式）
• The road came into use last month. • 这条路上个月开始使用。 • When did the train come into use?
• a great many + 可数名词复数 • a great number of + 可数名词复数 • plenty of… 足够多的…
• We still have plenty of water for the next 20 days.
Unit21Theweatherforecast.知识点(讲义)新概念英语青少版2B
Unit 21 The weather forecast 天气预报一、重点单词及拓展：1.rain 名词，雨；动词，下雨（普通动词，有时态的变化）1）不可数名词，雨例：There will be rain tomorrow. 明天将有雨。
2）动词，下雨三单rains, 现在分词raining, 过去式rained例：It will rain tomorrow. 明天将下雨。
It is raining heavily now. 现在雨下得很大。
3）rainy形容词，多雨的，阴雨的例：It is always rainy in Tianjin in July . 在天津，7月份总是多雨。
补充：snow（名词，雪；动词，下雪，和rain 用法相同）2.rise和raise的区别1）rise 不及物动词（vi），后面不能直接接宾语，意思是升起、上升、起床等，过去式为rose。
rise也可以做名词使用，表示上涨、提升等意思。
例：The sun rises in the east. 太阳从东方升起。
My parents rise very early. 我父母起床很早。
2）raise及物动词（vt）,后可直接接宾语，意思是举起、升起、增加、饲养等，过去式为raised。
例：He raised his voice. 他提高了嗓音。
I can’t raise the box. 我举不起这个箱子。
He is a farmer and raises horses. 他是农民, 同时又养马。
拓展短语：raise one’s hand举起手raise one’s hat 脱帽致意raise one’s voice 提高嗓门raise a family 养家糊口造句练习1：1）昨晚下了一夜的雨。
2）夏天是个多雨的季节。
你要随时准备好雨伞。
3）当太阳升起的时候，人们会感到温暖。
4）请先举手，再回答这个问题。
3.bring 动词，带来；引起；导致过去式为brought1）带来，通常指把人或事物带到讲话人或听话人所在之处，对应词为take（拿走）例：Did you bring my book this time? 你这次有把我的书带来吗？结构：bring+人/物to...例：She brought her friend to the party. 她带着朋友来参加聚会。
新概念二 第21课课件
We'll talk about it some other time.
课文注释
课文注释
3. 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。 (1)years 前面不加确定的数词时，一般表示“许多年”，weeks等的用法与它相似: He left the city years ago. 他多年前就离开了这座城市。
• 4.determined (1.8)/dr't3:mind/adj.坚定的,下决心的
·★1. mad
1.sb. be mad I must be mad! 我一定是气坏了！ 2.be mad at sb生某人的气 You're just mad at me because I don't want to go. 因为我不想去，你就对我火冒三丈。 mad at也可以和get搭配，表示变得对某人生气 You got mad at me then, too. 你那时候也对我不爽了。
新概念二
第21课 Mad or not？
1.New words 2.text
3.grammer
New words and expressions
New words and expressions
• 1.mad (l.1)/mæ d/ adj. 发疯
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7.sting vt.刺痛；使苦恼；欺诈 vi.叮；刺痛 n.刺；刺痛；讽刺 Most flies do not sting. 大多数苍蝇不叮人。 My tooth stings. 我牙痛得厉害。 His remarks stung. 他的话刺人。
8.poison n.毒药；毒害；vt.毒害；摧毁；中毒 He tried to kill himself by taking poison. 他曾试图服毒自杀。 Spiritual rubbish can poison the children's pure minds. 精神垃圾能毒害孩子们的纯洁心灵。
Unit 21
Mad or not?
a).drive Aeroplanes are slowly driving me mad. He drives his car very badly. The farmer drove the cattle into the field. Our army drove the enemy back. During the war,many people were driven out of their homes.
1.An invasion of jellyfish
Invasion---invade 侵略；侵入 invade的基本意思是“侵犯”“侵略” “涌入”,可指派军队侵略某个国家, 侵犯某人的权利,病毒、病菌侵入人体 或大批人涌向或涌入某地等。
They are determined to resist invasion. 他们决定抵抗入侵。 When did the Romans invade Britain? 古罗马人是何时侵略英国的? invade one's p_r_iv_a_cy___ 侵犯了某人的隐私权 invade one's r_ig_h_ts___ 侵犯了某人的权利
3.belong vi.应归入；属于 What party do you belong to? 你属于哪一党派？ You and I belong to different political camps. 你和我属于不同的政治阵营。 We belong together. 咱们在一起,正合适。
Reading
appearance n.出现；露面；外貌；外表； We should not judge a person by his appearance. 我们不应该以貌取人。 She was a young woman of good appearance. 她是一位年轻美貌的女子。
4.off Wales and Scotland 离…；在…的外面： only ten nautical miles off the main land 离大陆仅10海里 Keep off the Grass! (告示)勿踏草地!
Do you find that garlic repeats? 你是否觉得吃过大蒜后嘴里有气味
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2.tiny adj.极小的；微小的
The baby put his tiny hand in mine. 那个婴儿把小手放在我的手中。 She keeps a tiny cat. 她养了一只猫崽。 tiny amount 微小额 tiny island 小岛 tiny baby 个儿小的婴儿
3.appear vi.出现；出版；显得；好像； An article about him appeared in the paper. 一篇有关他的文章在报上发表。 She appeared very confident. 她显得很自信。 The room appeared much brighter than usual . 这屋子看来比平时亮得多。
6.make a living It is not so helpful to give someone some bread as to teach him how to make a living. 与其说给人面包很有帮助，倒不如说教导他如何 谋生才重要。 How do people make a living in the steppe? 生活在没有树木的大草原上的人们怎样谋生呢？
2.Initial n.(词)首字母 adj.开始的；最初的；字 首的 This is a letter paper with his initials. 这是一张有他姓名 首字母的信纸。 The initial reaction has been great. 最初的反应极好。
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poisonous adj.有毒的;恶意的 Some mushrooms are poisonous. 有些蘑菇有毒。
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9.repeat n.重复；反复 v.重复；复述 adj.重复的；反复的
Can you repeat what I've just said word for word?你能一字不差地复述我刚才说过的话 吗? Don't repeat the same mistake. 不要重复同样的错误。
5.float v.漂浮；浮现；n.浮标；漂浮物；漂浮 float的基本意思 是指在空气中、水面上 或其他平滑的表面上 轻盈地漂浮或不费力 地迅速滑动,引申可指 汇率、价格浮动,也可指人漫无目的地游来荡去。 There is not enough water to float the ship. 没有足够的水使船漂浮起来。