新概念第二册21课_新概念第二册第21课
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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 expreions 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 reon 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。lose one’s reason 丧失理智
Don't lose your reason however excited you are.无论你多么兴奋都不要丧失理智。
3.sum 1)n.金额，款项 a sum of money 一笔钱 表“许多”的短语：
a great many + pl.a number of + pl.a great number of + pl.a large number of + pl.a sum of(money)an amount of(money)
a large sum of money 一大笔钱 the sum of incomes 收入总计 2)n.大意，要旨
the sum of a speech 演讲大意 sum up(1)合计
sum up all the expenses 把所有的花费加起来(2)总结，概括
eg.To sum up, he agrees with us.总的来说，他同意我们的观点。in sum === in a word / in short / in brief 总之，要言之
4.determined adj.有决心的，坚定的determine vt.决定，确定，影响
eg.The environment determines one’s character.环境决定人的性格。determine on sth 决定做某事 /determine to do sth eg.They determined on an early start.他们决定采纳早些出发.eg.We determined to study English hard.我们决定要努力学习英语。eg.I am determined to stay here.我决定留下来。
课文讲解 1.drive eg.He drives his car very badly.他开车技术非常糟糕。
eg.The farmer drove the cattle in the field.那位农夫把牛赶进田里。
eg.Our army drove the enemy back.我们的军队把敌人赶回去了。
2.paing planes can be heard night and day过往飞机不绝于耳。
(in fact the noise of paing planes can be heard night and day)（借喻）eg.I couldn’t hear the actors.我听不见演员的话。→ I couldn’t hear the actors’ words.night and day/day and night日夜;夜以继日
3.for some reason 因为某种原因
some: 某种（个）+ 可数名词单数 in some way 在某种意义上 someone somebody 某人 something 某事
eg.Some Mr.Wang wanted you on the phone.一个王先生打电话找你。
4.come into use 投入使用（永无被动，物作主语）
eg.When did this word come into common use? 这个词什么时候广泛使用的？ eg.The airport came into use last year.这个机场去年投入使用。go out of use 停止使用
eg.The present phone boxes will go out of use next year.现有的电话亭明年停止使用。
5.left leave---left---left left作定语常放n.后
eg.There is only 2 yuan left in my pocket.我的口袋里只剩下2元钱。
eg.There is nobody left in the room.房间里一个人也没有留下。sometimes 有时候
sometime（过去或将来）某时候 some time 一段时间
some times 几次，几倍（本博注：这是中国人的用法，地道的说法是：several times）
关于knock的短语：
knock at 敲 knock at door knock at window knock off 下班；从…碰下去；优惠，折扣 knock over 撞翻，打翻，撞倒 knock down 撞倒 knock out 打昏
eg.Knock it off.住手！；住口！
6.offer vt.提供，给予
offer help 提供帮助
offer a sum of money 提供一笔钱 offer a job 提供一份工作 offer sb sth offer sth to sb=give sb sth 被动→ sb be given sth 某人被给某物
→ sb be offered sth 某人被提供某物 eg.He was given a job.eg.He was offered a job.被动→ sth be given to sb某物被给某人
→ sth be offered to sb某物被提供给某人 eg.A job was given to him.eg.A job was offered to him.Exercises: eg.After work I always go home.下班后我总是回家。eg.I stay at home during the weekend.周末我呆在家里。eg.There is no place like home.没有任何地方像家一样。
eg.They are building many new houses in our district.他们正在我们这个区建大量的新房子。
eg.Houses are very expensive.住宅很昂贵。
eg.I paid a lot of money for a new house.我付一大笔钱买了一栋新房子。eg.House is a man’s castle.家是男人的城堡。
eg.Thera is no place like home.金窝银窝不如自己的狗窝。eg.East or west, home is best.不管东南西北，家最好。homeland/ motherland/native land 祖国
1.It was raining heavily and I was glad to get home.2.The government plans to build thousands of houses next year.课堂小结：
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
④ be mad about/on sth，the reason for sth …理由 ⑤offer sth to sb=give sb sth 被动→ sb be given sth 某人被给某物
→ sb be offered sth 某人被提供某物
作业布置: 1练习册本课内容写完.背单词及课文中重点句型。3.家长签字
教学反思:
