贝竹一站通:[原创]简单易记的英语语法

一：祈使句：用以表达命令，要求，请求，劝告等。

1) 以动词原形开头

　　肯定结构： Take this seat.

　　 Be careful.

　 否定结构： Don't move.

　　　 Don't be late.

2） 以let开头(后面常带反意疑问句)

　a. Let's 包括对方（听话者）在内　

　　 Let's have another try，shall we?

　 = Shall we have another try?

b. Let us 不包括对方（听话者）在内

　　 Let us have another try，will you / won't you?

　 = Will you please let us have another try?

否定结构：　Let's not talk of that matter.

　 Let us not talk of that matter.

二：感叹句

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：　　

How +形容词+ a +名词+　　　　　陈述语序　　　

How+形容词或副词+　　　　　　 陈述语序

What +名词+　　　　　　　　　　 陈述语序

What+a+形容词+名词+　　　 　　陈述语序

What+ 形容词+复数名词+　　　　 陈述语序

What+ 形容词+不可数名词+　　　 陈述语序

How clever a boy he is!

How lovely the baby is!

What noise they are making!

What a clever boy he is!

What wonderful ideas (we have)!

What cold weather it is!

感叹句的省略形式为：

What a clever boy (he is)!

三：强调句

常考的强调句结构是it 引导的句子。此结构强调的成分仅限于主语，宾语和状语。

　 It is (was) 被强调部分+ that (who) + 句子其他部分。

　　 It is from the sun that we get light and heat.

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。

　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.

典型例句

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。 而是：

　 It is /was +时间+ since…　

强调谓语时用助动词do (did，does)后面接动词原形。

　She does like this horse.　她的确喜欢这匹马。

　Please do take care of yourself. 请千万保重。

四：倒装句

全部倒装是将句子中的谓语动词全部置于主语之前。此结构通常只用于一般现在时和一般过去时。常见的结构有：

　1) here, there, now, then, thus等副词置于句首, 谓语动词常用be, come, go, lie, run。

　 Here comes the bus.

　 Then came the chairman.

　 Here is your letter.

　2) 表示运动方向的副词或地点状语置于句首，谓语表示运动的动词。

　　Out rushed a cow from the house.

　　Ahead sat an old woman.

　注意：上述全部倒装的句型结构的主语必须是名词，如果主语是人称代词则不能完全倒装。

　　 Here he comes.　　

Away they went.

部分倒装是指将谓语的一部分如助动词或情态倒装至主语之前。如果句中的谓语没有助动词或情态动词，则需添加助动词do, does或did，并将其置于主语之前。以下情况需要部分倒装：

1)　句首为否定或半否定的词语，如no, not, never, seldom, little, hardly, at no time, in no way, not until… 等。

　　Never have I seen such a performance.

　　Nowhere will you find the answer to this question.

　　Not until the child fell asleep did the mother leave the room.

注意： 如否定词不在句首不倒装。

　　 I have never seen such a performance.

五：主谓一致

Reading and writing are very important.

当主语由and连结时，如果它表示一个单一的概念，即指同一人或同一物时，谓语动词用单数，and 此时连接的两个词前只有一个冠词。

　The iron and steel industry is very important to our life.

典型例题

　The League secretary and monitor ___ asked to make a speech at the meeting.

A. is　　B. was　 C. are　 D. were

答案B. 注： 先从时态上考虑。这是过去发生的事情应用过去时，先排除A，C。在英语中，当一人兼数职时只在第一个职务前加定冠词。后面的职务用and 相连。monitor 前没有the，本题主语为一个人，所以应选B。

六：主谓一致中的就近原则

1） 当there be 句型的主语是一系列事物时，谓语应与最邻近的主语保持一致。

There is a pen, a knife and several books on the desk..

There are twenty boy-students and twenty-three girl-students in the class.

2） 当either… or… 与neither… nor，　连接两个主语时，谓语动词与最邻近的主语保持一致。 如果句子是由here, there引导，而主语又不止一个时，谓语通常也和最邻近的主语一致。

Either you or she is to go.

Here is a pen, a few envelops and some paper for you.

当主语后面跟有with, together with, like, except, but, no less than, as well as 等词引起的短语时，谓语动词与前面的主语一致。

　 The teacher （together with some students） is visiting the factory.

　 He （as well as I） wants to go boating.

七：虚拟语气

可以表示过去，现在和将来的情况。它的基本特点是时态退后。

a.　 同现在事实相反的假设。

句型 ： 条件从句　　　　　主句

　　　　一般过去时　　　should( would) +动词原形

　 If they were here, they would help you.

b.　 表示于过去事实相反的假设。

句型： 条件从句　　　　　 主句

　　　过去完成时　　 should(would) have+ 过去分词

　 If she had worked harder, she would have succeeded.　

　 The rice would not have been burnt if you had been more careful.

　 If my lawyer had been here last Saturday, he would have prevented me from going.

　 If he had come yesterday, I should / would have told him about it.

　 含义：He did not come yesterday, so I did not tell him about it.

　 If he had not been ill and missed many classes, he would have made greater progress.

　 含义： He was ill and missed many lessons, so he did not make greater progress.　

c.　 表示对将来的假想

　句型：　 条件从句　　　　　　 主句

　　　　 一般过去时　　　　　 should + 动词原形

　　　　 were+ 不定式　　　　 would + 动词原形

　　　　 should+ 动词原形

　If you succeeded, everything would be all right.

　If you should succeed, everything would be all right.

　If you were to succeed, everything would be all right.

虚拟条件句的从句部分如果含有were, should, 或had, 可将if省略，再把were, should或had 移到从句句首，实行倒装。

　 Were they here now, they could help us.

　=If they were here now, they could help us.

　 Had you come earlier, you would have met him

　=If you had come earlier, you would have met him.　

　 Should it rain, the crops would be saved.

　=Were it to rain, the crops would be saved.

注意：

　 在虚拟语气的从句中，动词'be'的过去时态一律用"were"，不用was， 即在从句中be用were代替。

　 If I were you, I would go to look for him. 如果我是你，就会去找他。

　 If he were here, everything would be all right. 如果他在这儿，一切都会好的。

特殊的虚拟语气词：should

1） It is demanded / necessary / a pity + that…中的主语从句的谓语动词要用should 加动词原形， should 可省略。

句型：

　　　　(1)suggested

It is　 (2)important　　　　that…+ (should) do

　　　　(3) a pity

(1)suggested, ordered, proposed, required,　 demanded, requested, insisted； + (should) do

(2)important, necessary, natural, strange

a pity,　 a shame,　 no wonder

(3)It is suggested that we (should) hold a meeting next week.

　 It is necessary that he (should) come to our meeting tomorrow.

2）在宾语从句中的应用

　 在表示命令、建议、要求等一类动词后面的从句中。

order, suggest, propose, require, demand, request, insist, command, insist + (should) do

　 I suggest that we (should) hold a meeting next week.

　 He insisted that he (should) be sent there.

3）在表语从句，同位语从句中的应用

　　在suggestion, proposal, idea, plan, order, advice等名词后面的表语从句、同位语从句中要用虚拟语气，即（should）+动词原形。

　　My idea is that we (should) get more people to attend the conference.

　　 I make a proposal that we (should) hold a meeting next week

wish 的用法

1）用于wish后面的从句，表示与事实相反的情况，或表示将来不太可能实现的愿望。其宾语从句的动词形式为：

　　　　　　　　　　　　　 真实状况　wish后　　　　 　

从句动作先于主句动词动作　　现在时　　过去时

（be的过去式为 were）　　　　　　　　　　　　　　　 　

从句动作与主句动作同时发生　过去时　　过去完成时

（had + 过去分词）　　　　　　　　　　　　　　　　　　

将来不大可能实现的愿望　　　将来时　would/could +

　　　　　　　　　　　　　　　　　　　动词原形　　　　

　I wish I were as tall as you.　 我希望和你一样高。

　He wished he hadn't said that. 他希望他没讲那样的话。

　I wish it would rain tomorrow. 我希望明天下雨就好了。

2）Wish to do表达法。

　 Wish sb / sth to do

　 I wish to see the manager. = I want to see the manager.

　 I wish the manager to be informed at once. (= I want the manager to be informed at once.)

Only if 跟if only 的区别

only if表示"只有"；if only则表示"如果……就好了"。If only也可用于陈述语气。

　　I wake up only if the alarm clock rings. 只有闹钟响了，我才会醒。

　　If only the alarm clock had rung.　　 　当时闹钟响了，就好了。

　　If only he comes early.　　　　　　　 但愿他早点回来。

It is (high) time that 后面的从句谓语动词要用过去式或用should加动词原形，但should不可省略。

　 It is time that the children went to bed.

　 It is high time that the children should go to bed.

八：定语从句: 在句中做定语成分，修饰一个名词或代词，被修饰的名词,词组或代词即先行词。定语从句通常出现在先行词之后，由关系词（关系代词或关系副词）引出。

　　关系代词有：who, whom, whose, that, which等。

　　关系副词有：when, where, why等。

关系代词所代替的先行词是人或物的名词或代词，并在句中充当主语、宾语、定语等成分。关系代词在定语从句中作主语时，从句谓语动词的人称和数要和先行词保持一致。

1） who, whom, that

　 这些词代替的先行词是人的名词或代词，在从句中所起作用如下：

　 Is he the man who/that wants to see you?

他就是想见你的人吗？（who/that在从句中作主语）

　 He is the man whom/ that I saw yesterday.

他就是我昨天见的那个人。（whom/that在从句中作宾语）

2) Whose 用来指人或物，(只用作定语, 若指物，它还可以同of which互换）, 例如：

　 They rushed over to help the man whose car had broken down.　 那人车坏了，大家都跑过去帮忙。

　 Please pass me the book whose (of which) cover is green.　请递给我那本绿皮的书。

3）which, that

　 它们所代替的先行词是事物的名词或代词，在从句中可作主语、宾语等。

　　A prosperity which / that had never been seen before appears in the countryside. 农村出现了前所未有的繁荣。（which / that在句中作主语）

　　The package (which / that) you are carrying is about to come unwrapped. 你拿的包快散了。(which / that在句中作宾语）

关系副词可代替的先行词是时间、地点或理由的名词，在从句中作状语。

　 关系副词when, where, why的含义相当于"介词+ which"结构，因此常常和"介词+ which"结构交替使用，例如：

　 There are occasions when (on which) one must yield.　任何人都有不得不屈服的时候。

　 Beijing is the place where (in which) I was born.北京是我的出生地。

　 Is this the reason why (for which) he refused our offer?　这就是他拒绝我们帮助他的理由吗？

限制性和非限制性定语从句

1) 定语从句有限制性和非限制性两种。限制性定语从句是先行词不可缺少的部分，去掉它主句意思往往不明确；非限制性定语从句是先行词的附加说明，去掉了也不会影响主句的意思，它与主句之间通常用逗号分开，例如：

　　This is the house which we bought last month.　这是我们上个月买的那幢房子。（限制性）

　　The house, which we bought last month, is very nice. 这幢房子很漂亮，是我们上个月买的。（非限制性）

2) 当先行词是专有名词或物主代词和指示代词所修饰时，其后的定语从句通常是非限制性的，例如：

　　Charles Smith, who was my former teacher, retired last year. 查理•史密斯去年退休了，他曾经是我的老师。

　　My house, which I bought last year, has got a lovely garden.　我去年买的的那幢房子带着个漂亮的花园。

　　This novel, which I have read three times, is very touching. 这本小说很动人，我已经读了三遍。

3) 非限制性定语从句还能将整个主句作为先行词, 对其进行修饰, 这时从句谓语动词要用第三人称单数，例如：

　　He seems not to have grasped what I meant, which greatly upsets me. 他似乎没抓住我的意思，这使我心烦。

　　Liquid water changes to vapor, which is called evaporation. 液态水变为蒸汽，这就叫做蒸发。

说明：关系代词that和关系副词why不能引导非限制性定语从句。