新概念二册21课精品哦

aeroplane

airplane

plane

helicopter

jetaeroplane=airplane专指普通飞机，区别：aeroplane是英语，airplane是美语plane：本义为“平面”，意味着飞机在浩瀚的空中也能够平行飞行，比较口语化。航空专业语常用aeroplanehelicopter直升机jet喷气式飞机Lesson21Madornot?

是不是疯了？Firstlistenandthenanswerthequestions.Isthewriterslowlygoingmadornot?Wheredoeshelive?Whatcanbeheardnightandday?Havemostofhisneighbourslefttheirhomesornot?Hashebeenofferedmoneytoleaveornot?Whatishedeterminedtodo?Whatdoeseveryonesay?Aretheyprobablyrightorwrong?Newwordsandexpressionsmadadj.发疯Heisquitemad.他完全疯了amadplan冒险的计划madadj.生气的，愤怒的Shewasmadwithmeformylosingherkeys.madadj.狂热的，着迷的Sheismadaboutgoingtodance.Thedifferencebetween

"crazy"and“mad”mad：发疯的，疯狂的。一般说别人有病，带贬义。crazy：疯狂的，狂热的。中性或褒义reasonn.原因thereasonfor+名词...的原因What'sthereasonforyourabsence？你缺席的理由是什么？thereasontodo有理由去做什么Isthereanyreasontogothere？有理由去那吗？sumn.量

alargesumof:大量的，常跟钱连用

alargesumofmoney一大笔钱

decide和determine相同点：两者都有“决定”的意思不同点：decide:指经过询问、研讨后在几种可能的选择中做出决定。即不再迟疑不决。HedecidedtoleavehereonSundayinsteadofMonday.他决定周日而不是周一离开determinetodo下定决心做某事（不动摇）Ideterminedtostayhere.(本文）keysentences重点句型1.Aeroplanesareslowlydrivingmemad.drivesb.mad使某人发狂，发疯Thenoisyneighboralmostdrivesmemad.2.Ilivenearanairportandpassingplanescanbeheardnightandday.句中passing是现在分词，用来修饰名词planes,起形容词作用。pass:1.及格Ididn'tpasstheexam.

2.传递Passmethebook,please.

3.经过，穿过Hepassesmyhouseonthewaytoschool.

nightandday日日夜夜，夜以继日sleepingbaby正在睡觉的小孩

waitingcar正在等待的车3.Theairportwasbuiltyearsago,butforsomereasonitcouldnotbeusedthen.1)years前面不加确定的数词时，一般表示“许多年”yearsago=manyyearsago，weeks等的用法与它相似Ihavenotseenhimforweeks.2)forsomereason由于某个理由

some+可数名词单数：某一somebook

some+可数名词复数：一些somebooks

some+不可数名词：

一些somewater

I’lltellyousome

day.

We’lltalkaboutitsomeothertime.

我们改日再谈这件事。4.Lastyear,however,eintouse=putintouse投入使用Whendidthiswordcomeintocommonuse？gooutofuse停止使用Thephoneboxeswillgooutofnextyear.5.Overahundredpeoplemusthavebeendrivenawayfromtheirhomesbythenoise.

1)over=morethan 2)awayfrom离开 3)Home,family与househome:家,强调有感情;house仅仅指房子;family:家人

home=family+housemusthavedone对发生完的事情有把握的判断musthavebeendone（被动形式）3)sometimes有时候

sometime（过去或将来）某时候

sometime一段时间

sometimes几次，几倍（注：这是中国人的用法，地道的说法是：severaltimes）4）knockdown拆散，撞倒

knockat敲

knockout打昏

knockoff下班；从…碰下去；优惠，折扣

knockover撞翻，打翻，撞倒

6.Iamoneofthefewpeopleleft.SometimesIthinkthishousewillbeknockeddownby

apassingplane.1).oneof的用法（3点）

+名词复数

+谓语动词的单数+形容词的最高2）left表示被留下来的，leave---left---left

,left作定语后置,常放n.后.

left剩下的……东西，

Ihaveabagleft.

Thereistencentsleftinmypocket.

7.Ihavebeenoffered

alargesumofmoneytogoaway,butIamdeterminedtostayhere.offersbsth

offersthtosbgivesb.sth.givesth.tosb.offersb.alargesumofmoney=offeralargesumofmoneytosb.givesb.alargesumofmoney=givealargesumofmoneytosb.bedeterminedtodosth下定决心要做8.EverybodysaysImustbemadandtheyareprobablyright.1）Everybody不定代词作主语谓语动词用单数2）mustbe表对现在事实的肯定推测

动词语态英语动词有两种语态主动语态：主语是动作的执行者被动语态：主语是动作的承受者Manypeople

speakEnglish.(主动语态)Englishisspoken

by

manypeople.(被动语态)被动语态构成

be+动词的过去分词以see为例，比较主动语和态被动语态的结构形式肯定句，否定句及疑问句如下。CarsaremadeinChangchun.CarsarenotmadeinChangchun.---ArecarsmadeinChangchun?(---Yes,theyare./No,theyaren’t.)Wherearecarsmade?被动语态使用方法

Whencanweusethepassivevoice?不知道动作的执行者是谁，或没有必要指出动作的执行者时。Mybikewasstolenlastnight.

Lettersarecollectedateighteverymorning.2.为了强调或突出动作的承受者时。ThedeskwasmadebyMasterWang.Thebagwastakenawaybyhissister.主动语态改为被动语态的方法将主动语态的宾语改为被动语态的主语。将主动语态的谓语动词改为“be+过去分词”结构。将主动语态的主语改为介词by之后的宾语，放在谓语动词之后（有时可省略）。将下列句子改成被动语态。1.We

useEnglishasaforeignlanguage.→Englishisusedasaforeignlanguage(byus)2.Peoplewrite

businesslettersinEnglish→Businessletters

arewritten(

bypeople)inEnglish.3.TheymaketelephonecallsinEnglish.→Telephonecallsaremade(bythem)inEnglish.4.Travelersandbusiness