8．条件假设句

　1)一般事实

　If we succeed, what will the people say?

　Suppose it rains, what shall we do?

　Persevere(坚持)and you'll succeed.

　2) 虚拟条件句

　If I were a teacher, I wouldn't scold my pupils like that.

　If you had seen it, you would have been moved.

　3) 反条件句

　Unless you try, you'll never succeed.

　Don't move, or/ else/ otherwise I'll shoot.

　4) 唯一条件句

　If only I have another chance, I shall do better.

　Only in this way can we learn English well.

　So/ As long as we don't lose heart, we'll succeed.

　5) 推论条件句

　Since that is so, there is no more to say.

　Now that you are a grown-up, you must stop this behavior.

7．比喻句型

　She is as cute as a newborn kitten.

　You are my star in the night.

6．比较句型

　1) 等比句

　He is as tall as I.

　He is the same height as I.

　She is no less diligent than he.

　The lab is no better than a cottage.

　2)差比句

　I speak English worse than he does.

　He is not so/as tall as I am.

　3)极比句

　He is the tallest of all in the class.

　None/No one is so blind as those that won't see.

　Nothing is so easy as this.

　I can't agree more.

　I have never spent a better night.

　4) 比例句

　The more a man knows, the more he feels his ignorance(无知)．

　5)择比句

　He is taller than any other boy in the class.

　It is better late than never.

　They would die than live as slaves.

　He prefers doing to talking.

　He prefers to do rather than to talk.

　He prefers mathematics to English.

　I'd rather stay here.

　6)对比句

　You think me idle, but on the contrary, I am busy.

　They are working hard while you are wasting your time.

5．关联指代句型

　1) 两项关联

　I have two books, one is Chinese; the other English.

　I have five books, one is Chinese; the others English.

　To say is one thing, but/ and to do is another.

　On (the) one hand, I am your teacher, and on the other hand, I am also your friend.

　Some like to play football, others are fond of basketball.

　2) 先后顺序

　First/ Firstly, I wish good health, second/secondly success in your study, third/ thirdly good luck in everything.

　First stop, then look, finally cross.

　At first/ In the beginning he works hard. Later/ Afterwards he is not so diligent.

　3) 修饰限制

　This is the same book as I lost yesterday.

　This is the same book that I lost yesterday. (同一本书)

　Don't trust such a man as over praise you.

　He/ One/ Those/ They who should come failed to appear.

　A man/ A person/ The one/ Anyone/ People who saw her liked her very much.

　The day/ time/ moment will come when China is the strongest in the world.

　4)两项连接

　He can speak not only English but also French.

　The book is both interesting and instructive.

　It is neither cold nor hot.

　Please either come in or go out.

　The old worker has experience and knowledge as well.

　5) 加和关系

　Besides literature, we have grammar and writing.

　Apart from oxygen, there are some other gases in the air.

　In addition to "if"，there are many other conjunctions that can introduce conditional clauses.

　I must go now, incidentally, if you want that book.

　You seem to like tea, so do I.

4．数词句型

　1)表数目

　It is exactly ten o'clock/ It's ten o'clock sharp.

　It is five miles away from here.

　He is more than/over/ at least/not less than 20.

　He is under/ at most/no more than 20.

　2) 表年月日

　He was born on April 22 1994/in 1994 on the morning of Oct.1.

　3) 表年龄

　He is 20 years old/ years of age.

　He is at the age of 10.

　He is in his teens/ twenties/ thirties/...

　4) 表倍数

　It is four times that of last years.

　This is four times as big (again) as that one.

　This is four times bigger than that one.

　The income is double what it was.

　The output of coal was 200% greater than in 1998.

　5) 表计量

　It is 10 meters long/ wide/ high. / 10 meters in length/ width/ height.

　It costs me 100 yuan.

　I spent 10 hours finishing it.

　It took me 10 days to finish it.

　It is worth 100 yuan.

3．祝愿祈使句式

　1)一般句式

　Study hard and keep fit.

　2)强调句式

　Do tell me. It's no need to keep it a secret.

　Never tell a lie. You should be an honest boy.

　3)委婉祈使句

　Please tell me the truth.

　Would/Will/Won't do me a favor?

　Would/Do you mind my smoking?

　What/How about going on foot?

　4) 建议祈使句

　Let us go. Let us know the time.

　Let's not waste the time.

　You'd better start early.

　Shall we listen to some music?

　Why don't you get something to drink?

　Suppose/ Supposing you pick me up at about six?

　I suggest we (should) take the train instead of a bus.

　5)祝愿句

　Success to you!

　Wish you a good journey.

　May you have a happy marriage?

　Allow me to propose a toast to our friendship!

2．判断句型

　1)一般判断句

　It is important for us to learn English.

　It is kind of you to help me. Sincere means honest.

　The boy is called/ named Tom.

　We regarded/consider it as an honor.

　2)强调判断

　It is English that we should learn.

　It is he who helped me a lot.

　3)弱式判断

　Your sentence doesn't sound/ look/ appear/ feel right.

　You look/ seem as if/ as though you had been there before.

　Maybe/ Perhaps she is ill.

　It is possible that he hasn't grasped what you have said.

　4)注释判断

　He can remember so many English words, that is (to say) he is a living dictionary(活字典)．

　5)正反判断

　That sounds all right, but in fact it is on the contrary/ it is not.

　6)比较判断

　It is more a picture than a poem.

　He or you are wrong.

　Either he is right or I am.

1．否定句型

　1)一般否定句

　I don't know this. No news is good news.

　There is no person (smoking)/ not a person/ not any person (smoking) in the house.

　2)特指否定

　She went to his office, not to see him.

　I am sorry for not coming on time.

　I don't think/ believe/ suppose/ feel/ imagine you are right.

　3)部分否定

　All is not gold that glitters.

　I don't know all of them.

　I can't see everybody/everything.

　Both of them are not right.

　4)全体否定

　None of my friends smoke.

　I can see nothing/nobody.

　Neither of them is right.

　Nothing can be so simple as this.

　5)延续否定

　You didn't see him, neither/nor did I.

　You don't know, I don't know either.

　He doesn't know English, let alone/ to say nothing of/ not to speak of (更不用说)French.

　6)半否定句

　We seldom/ hardly/ scarcely/ barely hear such fine singing.

　I know little English. I saw few people.

　7)双重否定

　You can't make something out of nothing.

　What's done cannot be undone.

　There is no sweet without sweat.

　No gain without pains.

　I can't help /keep/ laughing whenever I hear it.

　8)排除否定

　Everyone is ready except you.

　He did nothing but play.

　But for your help, I couldn't have done it.

　9)加强否定

　Whatever you say, I won't do it at all.

　I can't see it any more, though I have looked for it everywhere.

　He is now a man. He is no longer a boy.

14.(2010济南一摸)为了减少输电线路中电力损失，发电厂发出的电通常是经过升压变电站升压后通过远距离输送，再经过降压变电站将高压变为低压．某降压变电站将电压的交流电降为220 V供居民小区用电，则变电站变压器　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 (　　 )

A．原、副线圈匝数比为50：l

　　　 B．副线圈中电流的频率是50 Hz

　　　 C．原线圈的导线比副线圈的要粗

　　　 D．输入原线圈的电流等于居民小区各用电器

13．(2010青岛一模)实验室里的交流发电机可简化为如图所示的模型，正方形线圈在水平匀强磁场中，绕垂直于磁感线的OO' 轴 匀速转动．今在发电机的输出端接一个电阻 R 和理想电压表，并让线圈每秒转25圈，读出电压表的示数为10V．已知R = 10 Ω，线圈电阻忽略不计，下列说法正确的是

A．线圈位于图中位置时，线圈中的瞬时电流为零

B．从中性面开始计时，线圈中电流瞬时值表达式为 (A)

C．流过电阻 R 的电流每秒钟方向改变50次

D．电阻 R上的热功率等于20W