13. 句子的种类
（一）按使用目的，句子可分为陈述句、疑问句、祈使句和感叹句。
1）陈述句（Declarative Sentences）：说明一个事实或陈述一种看法。例如：
Light travels faster than sound. 光比声传播速度快。（说明事实）
The film is rather boring. 这部电影很乏味。（说明看法）
2）疑问句（Interrogative Sentences）：提出问题。有以下四种：
a. 一般疑问句（General Questions）：
Can you finish the work in time? 你能按时完成工作吗？
b. 特殊疑问句（Wh-Questions）：
Where do you live? 你住那儿？
c. 选择疑问句（Alternative Questions）：
Do you want tea or coffee? 你是要茶还是要咖啡？
d. 反意疑问句（Tag-Questions）：
He doesn't know her, does he? 他不认识她，对不对？
3）祈使句（Imperative Sentences）：提出请求，建议或发出命令。例如：
Don't be nervous! 别紧张！
4）感叹句（Exclamatory Sentences）：表示说话人惊奇、喜悦、愤怒等情绪。例如：
What good news it is! 多好的消息啊！
（二）句子按其结构可以分为以下三类：
1）简单句（Simple Sentences）：只包含一个主谓结构句子叫简单句。例如：
She is fond of collecting stamps. 她喜欢集邮。
2）并列句（Compound Sentences）：包含两个或两个以上主谓结构的句子叫并列句，句与句之间通常用并列连词或分号来连接。例如：
The food was good, but he had little appetite. 食物很精美，但他却没什么胃口。
3）复合句（Complex Sentences）：包含一个主句和一个或几个从句的句子叫复合句，从句由从属连词引导。例如：
The film had begun when we got to the cinema. 我们到达电影院的时候，电影已经开演了。
（三）基本句型（Basic Sentence Patterns）：英语中千变万化的句子归根结底都是由以下五种基本句型组合、扩展、变化而来的：
1）主 + 动（SV）例如：I work. 我工作。
2）主 + 动 + 表（SVP）例如：John is busy. 约翰忙。
3）主 + 动 + 宾（SVO）例如：She studies English. 她学英语。
4）主 + 动 + 宾 + 补（SVOC）例如：Time would prove me right. 时间会证明我是对的。
5）主 + 动 + 间宾 + 直宾（SVOiOd）例如：My mother made me a new dress. 我母亲给我做了一件新衣裳。
13.1 祈使句结构
祈使句用以表达命令，要求，请求，劝告等。
1）祈使句有两种类型，一种是以动词原形开头，在动词原形之前加do （但只限于省略第二人称主语的句子）。例如：
Take this seat. 坐这儿。
Do be careful. 务必小心。
否定结构：例如：
Don't move. 不准动。
Don't be late. 不要迟到。
2）第二种祈使句以let开头。
Let 的反意疑问句：
a. Let's 包括说话者。例如：
Let's have another try, shall we / shan't we? = Shall we have another try? 我们再试一次，如何？
b. Let us 不包括说话者。例如：
Let us have another try，will you / won't you? = Will you please let us have another try? 你让我们再试一次，好吗？
否定结构：例如：
Let's not talk of that matter. 不要谈这件事。
Let us not talk of that matter. 你不要让我们谈这件事。
13.2 感叹句结构
感叹句通常有what, how引导，表示赞美、惊叹、喜悦、等感情。what修饰名词，how 修饰形容词，副词或动词，感叹句结构主要有以下几种：
掌握它的搭配，即掌握了感叹句的重点。
How +形容词+ a +名词+ 陈述语序。例如：How clever a boy he is! 他是多聪明的孩子！
How+形容词或副词+陈述语序。例如：How lovely the baby is! 小毛头真可爱！
What +名词+陈述语序。例如：What noise they are making! 他们真吵！
What +a+形容词+名词+陈述语序。例如：What a clever boy he is! 他是多聪明的孩子！
What+ 形容词+复数名词+陈述语序。例如：What wonderful ideas （we have）! 我们的主意真棒！
What+ 形容词+不可数名词+陈述语序。例如：What cold weather it is! 多冷的天！
What a clever boy he is!的省略形式为：What a clever boy!
典型例题
1）___ food you've cooked!
A. How a nice B. What a nice C. How nice D. What nice
答案D. 由于How 修饰形容词，副词；what修饰名词。且food为不可数名词，因此A，B 排除。C的 How + adj. 后面不能再加名词，因此只有D正确，其句型为What + adj. +n. （不可数）。
2）___terrible weather we've been having these days!
A. What B. What a C. How D. How a
答案A. weather为不可数名词，B，D排除。C为how + adj. 后面不应有名词。只有A，符合句型What +形容词+不可数名词。
3） --- _____ I had!
--- You really suffered a lot.
A. What a time B. What time C. How a time D. how time
答案A. 感叹句分两类：
1：What + n.+主谓部分
2：How + adj. / adv. / v.+主谓部分。本题属第一种，但省略了bad，相对于 What a bad time I had! 这是个习惯用语。
13.3 强调句结构
常用的强调句结构是it 引导的句子，结构为It is（was）+ 被强调部分+ that （who） + 句子的其余部分。此结构强调的成分限于主语，宾语和状语。例如：
It is from the sun that we get light and heat. 我们是从太阳那儿获取光和热。
It was not until I had read your letter that I understood the true state of affairs. 知道读了你的信，我才知道实际情形。
典型例题
1）It was last night ___ I see the comet.
A. the time B. when C. that D. which
答案C. 强调句的结构是： It +be +强调部分 + that （who））+ 主谓句。 强调句的连词只有两个，that和who。当强调的部分是人，且为句子的主语时，才用 "who"，其余用that。再如：原句：My father did the experiment in the lab yesterday evening.
强调主语： It was my father who did the experiment in the lab yesterday evening.
强调宾语： It was the experiment that my father did in the lab yesterday evening.
强调时间： It was yesterday evening that my father did the experiment in the lab. （注意不用when）
强调地点： It was in the lab that my father did the experiment yesterday evening.
2）It is ten years ___ Miss Green returned to Canada.
A. that B. when C. since D. as
答案C. 考点是连词用法。本题易误选为A. that. 其实本句不是强调句。若是，去掉It be… that还应是一个完整的句子。而本句去掉 'It is…that'，只剩下ten years Miss Green returned to Canada. 不成句。因此本句不是强调句。
13.4 用助动词进行强调
句子的强调句还可以用助动词do （did，does） 强调谓语。例如：
She does like this horse. 她的确喜欢这匹马。
Please do take care of yourself. 千万保重。
13.5 反意疑问句
1） 陈述部分的主语是I，疑问部分要用 aren't I。例如：
I'm as tall as your sister, aren't I? 我跟你姐一样高，对吗？
2） 陈述部分的谓语是wish，疑问部分要用may +主语。例如：
I wish to have a word with you, may I? 我想与你说句话，行吗？
3） 陈述部分用 no, nothing, nobody, never, few, seldom, hardly, rarely, little等否定含义的词时，疑问部分用肯定含义。例如：
Some plants never blown （开花）, do they ? 有些植物从不开花，对吗？
4） 含有ought to 的反意疑问句，陈述部分是肯定的，疑问部分用shouldn't / oughtn't +主语。例如：
He ought to know what to do, oughtn't he? / shouldn't he? 他应该知道该做什么，对吗？
5） 陈述部分有have to +v. （had to + v.），疑问部分常用don't +主语（didn't +主语）。例如：
We have to get there at eight tomorrow, don't we? 我们要在明天早上八点到达那儿，是吗？
6） 陈述部分的谓语是used to 时，疑问部分用didn't +主语或 usedn't +主语。例如：
He used to take pictures there, didn't he? / usedn't he? 他以前常在那儿拍照，是吗？
7） 陈述部分有had better + v. 疑问句部分用hadn't you? 例如：
You'd better read it by yourself, hadn't you? 你最好自己去读，好吗？
8） 陈述部分有would rather +v.，疑问部分多用 wouldn't +主语。例如：
He would rather read it ten times than recite it, wouldn't he? 他宁可读十遍也不愿意背诵，是吗？
9） 陈述部分有You'd like to +v. 疑问部分用wouldn't +主语。例如：
You'd like to go with me, wouldn't you? 你想和我们一块去，对吗？
10） 陈述部分有must 的疑问句，疑问部分根据实际情况而定。例如：
He must be a doctor, isn't he? 他肯定是医生，是吗？
You must have studied English for three years, haven't you? / didn't you? 你一定读过三年英语，对吗？
He must have finished it yesterday, didn't he? 他肯定是在昨天完成任务的，是吗？
11） 感叹句中，疑问部分用be +主语。例如：
What colors, aren't they? 多漂亮的颜色，是吗？
12） 陈述部分由neither… nor, either… or 连接的并列主语时，疑问部分根据其实际逻辑意义而定。
Neither you nor I am engineer, are we? 你不是工程师，我也不是，对吗？
13） 陈述部分主语是指示代词或不定代词everything, that, nothing, this, 疑问部分主语用it。例如：
Everything is ready, isn't it? 一切就绪，是吗？
14） 陈述部分为主语从句或并列复合句，疑问部分有三种情况：
a. 并列复合句疑问部分，谓语动词根据邻近从句的谓语而定。例如：
Mr. Smith had been to Beijing for several times, he should have been in China now, shouldn't he?
史密斯先生曾几次去过北京，按理说他现在应该在中国，是吗？
b. 带有定语从句，宾语从句的主从复合句，疑问部分谓语根据主句的谓语而定。例如：
He said he wanted to visit Japan, didn't he? 他说他想去日本看看，他是那样说的吗？
c. 陈述部分主句为第一人称，谓语是think, believe, expect, suppose, imagine等引导的定语从句，疑问部分与宾语从句相对应构成反意疑问句。例如：
I don't think he is bright, is he? 我认为他并不聪明，是吗？
We believe she can do it better, can't she? 我们相信她能做得更好，她能吗？
15） 陈述部分主语是不定代词everybody, anyone, somebody, nobody, no one等，疑问部分常用复数they，有时也用单数he。例如：
Everyone knows the answer, don't they? （does he?） 人人都知道答案，是这样吧？
Nobody knows about it, do they? （does he?） 没人知道这件事，是吧？
16） 带情态动词dare或need的反意疑问句，疑问部分常用 need （dare ） +主语。例如：
We need not do it again, need we ? 我们不必重做一遍，是吗？
He dare not say so, dare he? 他不敢这样说，是吗？
当dare, need 为实义动词时，疑问部分用助动词do + 主语。例如：
She doesn't dare to go home alone, does she? 她不敢独自回家，是吗？
17） 省去主语的祈使句的反意疑问句，疑问部分用will you。例如：
Don't do that again, will you? 别再这样做，好吗？
Go with me, will you / won't you ? 跟我走吧，好吗？
注意：Let's 开头的祈使句，后用shall we?
Let us 开头的祈使句，后用will you? 例如：
Let's go and listen to the music, shall we? 一起去听音乐，好吗？
Let us wait for you in the reading-room, will you ? 你让我们在阅览室等你，好吗？
18） 陈述部分是"there be"结构的，疑问部分用there省略主语代词。例如：
There is something wrong with your watch, isn't there? 你的表有问题，对不对？
There will not be any trouble, will there? 不会有麻烦吧，是吗？
19） 否定前缀不能视为否定词，其反意疑问句仍用否定形式。例如：
It is impossible, isn't it? 这不可能，是吗？
He is not unkind to his classmates, is he? 他不会对他同学使坏，是吗？
20） must在表"推测"时，根据其推测的情况来确定反意疑问句。例如：
He must be there now, isn't he? 他现在肯定在那儿，是吧？
It must be going to rain tomorrow, won't it? 明天肯定要下雨，是吗？
13.6 反意疑问句练习
1. You’d rather watch TV this evening, ______?
a. isn’t it b. hadn’t you c. wouldn’t you d. won’t you
2. I suppose you’re not going today, ______?
a. are you b. do you c. don’t you d. aren’t you
3. I wish to shake hands with you, ______?
a. shall b. may I c. do I d. will I
4. Three hours ought to be enough time, ______?
a. oughtn’t three hours b. didn’t they c. shouldn’t it d. shouldn’t three hours
5. They have to study a lot, ______?
a. don’t they b. haven’t they c. did they d. hadn’t they
6. When the car crashed, your brother escaped being hurt, ______ ?
a. didn’t he b. did he c. did it d. didn’t it
7. I'm sure dirty, ______?
a. am I b. isn’t I c. aren’t I d. am not I
8. You seem to be dissatisfied with your present post. I don’t think you judged your ability objectively when you applied for it, ______ you?
a. do b. did c. don’t d. didn’t
9. That’s the sort of the book you want, ______?
a. is it d. isn’t that c. is that d. isn’t it
10. All these dictionaries are a great help to you, ______?
a. are they b. aren’t they
c. are all these dictionaries d. aren’t all these dictionaries
11. The movie that we saw last week was quite interesting, ______?
a. wasn’t it b. was it c. didn’t we d. weren’t we
12. Tom has been writing letters all afternoon, but he should have finished them by now,
______?
a. hasn’t he b. has he c. shouldn’t he d. didn’t you
13. David told me that you would take a trip to America, ______?
a. would you b. wouldn’t you c. did you d. didn’t you
14. There appeared to be no better way, _______?
a. was there b. were there c. did there d. didn’t there
15. You has some trouble finding where I live, ______?
a. didn’t you b. hadn’t you c. do I d. don’t I
16. He has his hair cut every month, ______?
a. has he b. hasn’t he c. does he d. doesn’t he
17. Your friend needs to come earlier, ______?
a. does he b. doesn’t he c. need he d. needn’t he
18. The little boy dare not go to church, ______?
a. dare he b. daren’t he c. does he d. doesn’t he
19. Susan’d have worked abroad if she’d had the chance, ______?
a. has she b. hadn’t she c. would she d. wouldn’t she
20. Everyone’s having a good time, ______?
a. is he b. isn’t everyone c. does he d. aren’t they
21. Any one can join the club, ______?
a. can any one b. can’t any one c. can’t they d. can they
22. Tell me how to operate the electronic computer, ______?
a. will you b. shan’t you c. do you d. don’t you
23. Magaret scarcely comes to visit you on Christmas Day, ______?
a. doesn’t she b. does she c. do you d. don’t you
24. Let’s listen to the radio program that the teacher mentioned, ______?
a. do we b. don’t we c. shall we d. shan’t we
25. You think you’re funny, ______?
a. didn’t you b. are you c. don’t you d. do you
26. Janet used to take part in labor in that village, ______?
a. used she b. did she c. didn’t she d. should she
27. What beautiful weather, ______?
a. is it b. isn’t it c. won’t it d. doesn’t it
28. He ought to go to Kwangchow by plane, ______?
a. should he b. shouldn’t he c. would he d. wouldn’t he
29. We never dared to ask him a question, ______?
a. did we b. didn’t we c. dared we d. daren’t we
30. Nobody will believe how difficult his work has been ______?
a. will he b. won’t nobody c. will they d. won’t they
31. You must have made the mistake, ______?
a. mustn’t you b. haven’t you c. didn’t you d. hadn’t you
32. Learning how to repair computers takes a long time, ______?
a. isn’t it b. aren’t they c. doesn’t it d. don’t they
33. Jack has coffee with breakfast, ______?
a. hasn’t Jack b. hasn’t he c. doesn’t Jack d. doesn’t he
34. They must have stayed at hotel last night, ______?
a. mustn’t they b. haven’t they c. didn’t they d. hadn’t they
35. There isn’t anything wrong with the radio, ______?
a. is there b. is it c. does it d. does there
36. You must be hungry, ______?
a. must you b. mustn’t you c. are you d. aren’t you
37. Let’s do the exercises by ourselves, ______?
a. shall we b. shan’t we c. will you d. will we
38. Her daughter had the carpets and curtains cleaned, ______?
a. had she b. hadn’t she c. didn’t she d. didn’t her daughter
39. The teacher had a talk with you, ______?
a. has you b. hadn’t she c. did she d. didn’t she
40. Something’ll have to be done about the air pollution, ______?
a. won’t it b. will it c. has it d. does it
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