英语常见语法汇总

『壹』 英语各种语法，越多越好！

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『贰』 常用的英语语法有哪些呢

语从句(Subject
Clause)
定义:如果一个句子在复合句中充当一个主语,那么这个句子就是主语从句.
第一部分：常规主语从句,即句子在复合句中充当一个主语
第二部分：为了防止句子头重脚轻,通常把形式主语it放在主语位置,真正主语搁置于句末
状语从句
（Adverbial
Clause）
状语从句指句子用作状语时,起副词作用的句子.它可以修饰谓语、非谓语动词、定语、状语或整个句子.根据其作用可分为时间、地点、原因、条件、目的、结果、让步、方式和比较等从句.状语从句一般由连词(从属连词)引导,也可以由词组引起.从句位于句首或句中时通常用逗号与主句隔开,位于句尾时可以不用逗号隔开.
同位语部分是个句子,就是同位语从句,这种用法比较"固定",把关键的几个词背下来.
下面这个材料供参考.
一、在复合句中用作同位语的从句叫同位语从句.它一般跟在某些名词后面,用以说明该名词表示的具体内容.如：
I
heard
the
news
that
our
team
had
won．我听到了我们队获胜的消息.
I
had
no
idea
that
you
were
here．我不知道你在这里.
二、可以跟同位语从句的名词通常有news,idea,fact,promise,question,doubt,thought,hope,message,suggestion,words（消息）,possibility等.如：
I’ve
come
from
Mr
wang
with
a
message
that
he
won’t
be
able
to
see
you
this
afternoon．
我从王先生那里来,他让我告诉你他今天下午不能来看你了.
三、英语中引导同位语从句的词通有连词
that,whether,连接副词
how,when,where等.（注：if,which
不能引导同位语从句.）如：
l
have
no
idea
When
he
will
be
back．我不知道他什么时候回来.
He
must
answer
the
question
whether
he
agrees
to
it
or
not.
他必须回答他是否同意这样一个问题.
四、有时同位语从句可以不紧跟在说明的名词后面,而被别的词隔开.如：
Several
years
later,word
came
that
Napoleon
himself
was
coming
to
inspect
them．
几年以后,有消息传来说拿破仑要亲自视
察他们.
The
thought
came
to
him
that
maybe
the
enemy
had
fled
the
city．
他突然想起可能敌人已经逃出城了.
五、同位语从句与定语从句的区别.
1、同位语从句与前面的名词是同位关系,即说明它前面名词的内容；而定语从句与前面的名词是修饰与被修饰关系,即限定它前面的名词范围,或补充一些情况.如：
The
news
that
l
have
passed
the
exam
is
true．我通过了考试这一消息是真的.
（同位语从句,即从句所表达的意思就是前面名词的内容.）
The
news
that
he
told
me
just
now
is
true．他刚才告诉我的消息是真的.
（定语从句,从句对前面名词起修饰限制作用,即“他告诉我的”那个消息,而不是别的消息.）
2、引导同位语从句的that是连词,在从句中不充当任何成份,而引导定语从句的that是关系代词,除起连接作用外,还在从句中充当主语、宾语或表语等.如：
The
idea
that
computers
can
recognize
human
voices
surprises
many
people.
计算机能够识别人的声音的想法使许多人感到惊奇.（that在从句中不充当任何成份.）
The
idea
that
he
gave
surprises
many
people．他提出的观点令许多人感到吃惊.
（that在从句中作gave的宾语.）
一个名词(或其它形式)对另一个名词或代词进行修饰,限定或说明,这个名词(或其它形
式)就是同位语.同位语与被它限定的词的格要一致,并常常紧挨在一起.

『叁』 英语语法总汇

常用介词短语
表示时间：
time in 1999, in 20 century,
in a flash(瞬时),
in a lucky hour(在幸运时刻),
in a minute, in a second, in a short time, in a while,
in a wink(一瞬间)
in advance(预先),
in an emergency(在紧急地时候),
in an evil hour(在不幸地时刻),
in an instant, in ancient times, in broad day(在大白天),
in course of, (在…期间),
in December, in e course(及时地)
in future, in good season(及时地)
in no time(马上)
in one's childhood
in one's spare time in one's teens
in one's youth
in recent years
in season(适时)
in seconds(在很短的时间)
in some cases(有时候)
in spring
in the afternoon
in the beginning
in the daytime
in the end
in the evening,
in the future
in the long run(最后)

介词归类：
at once 立刻
at last 最后
at first 起先，首先
at the age of… 在……岁时
at the end of… 在……之末
at the beginning of… 在……之初
at the foot of… 在……脚下
at the same time 同时
at night/noon 在夜里/中午
with one's help 在某人的帮助下，由于某人的帮助
with the help of … 在……的帮助下

『肆』 英语共计多少种语法全部的，多少种词。

一共16个时态，分别是：

1、一般现在时 。

2、一般过去时 。

3、一般将来时。

4、一般过去将来时。

5、现在进行时 。

6、过去进行时 。

7、将来进行时 。

8、过去将来进行时。

9、现在完成时 。

10、过去完成时 。

11、将来完成时 。

12、过去将来完成时。

13、现在完成进行时 。

14、过去完成进行时 。

15、将来完成进行时 。

16、过去将来完成进行时。

(4)英语常见语法汇总扩展阅读：

英语测试

英国：国际英语测试系统（IELTS，International English Language Testing System，雅思），剑桥英文认证（Cambridge Main Suit），剑桥商务英语（Cambridge Business EnglishCertificate）。

美国：托福（TOEFL），机考托福（CBT；逐渐废除），网考托福（iBT），托业（TOEIC，商用英文考试），英语口语水平测试（TSE）。

中国大陆：，大学英语考试（CET），大学英语四级考试（CET-4），大学英语六级考试（CET-6），高等学校英语专业考试（TEM），英语专业四级考试（TEM-4），英语专业八级考试（TEM-8），英语等级考试(PETS)。

中国台湾：全民英语能力分级检定测验（GEPT）。

『伍』 英语常用的几个语法点有什么，

英语常用的几个语法点有什么， 中学语法大全 代词
目录
人称代词的用法 2
人称代词之主、宾格的版替换权 2
代词的指代问题 3
并列人称代词的排列顺序 3
物主代词 4
双重所有格 4
反身代词 4
相互代词 5
指示代词 6
疑问代词 7
关系代词 8
every, no, all, both,... 9
none, few, some, any,... 10
代词比较辩异one, that和it 11
one/another/the other 11
"the"的妙用 12
anyone/any one;... 12
both, either, neither,... 13
many, much 14
few, little, a few,... 14

『陆』 英语各种语法全解

1. 动词的时态和语态
1．1 动词的时态和语态一览表
时态语态 一般现在时 一般过去时 一般将来时
主动被动 doare done didwere done will dowill be done
现在进行时 过去进行时 将来进行时
主动被动 are doingare being done were doingwere being done will be doing
现在完成时 过去完成时 将来完成时
主动 被动 have donehave been done had donehad been done will have donewill have been done
现在完成进行时
主动 被动 have been doing

1.2 动词主要时态的意义及运用
1) 现在完成时，过去完成时和将来完成时
英语提示语：up to now, so far, for three years, since 1995, over past ten years, by the end of this week, by the year of 1995
汉语提示语：已经，早已，了
e.g. We haven’t met each other since last year.
By the end of this week, we’ll have finished the task.
2) 现在完成进行时
从过去一直持续到现在，没有间断。
汉语提示语：一直
e.g. The water has been running the whole night.
3) 过去完成时
a) said, reported, thought 等引导的间接引语中。
e.g. He missed the train. He said he had missed the train.
b) hardly…when, no sooner… than
e.g. No sooner had he got up than he received the call.
c) 与过去事实相反的虚拟语气的条件状语从句中
e.g. If I had tried harder, I would have won.
I wish I had done better in the exam.

历年考题中的动词时态和语态
1. Much of the carbon in the earth ___ (come) from things that once lived.
2. In the past two decades, research ___ (expand) our knowledge about sleep and dream.
3. Some proverbs ___ (be) in the language for 1,000 years, for example, A friend in need is a friend indeed.
4. ___ (stand) at the gate was a young man in green coat.
5. In 1991, after the Gulf War, Bush’s approved rating reached 91 percent, the highest level recorded since polling ___ (begin) in the 19302.
6. Seeing violence on television or reading about it in the newspapers every day ___ (make) us tolerate crime more than we should.
7. So far, Irving ___ (live) in New York City for ten years.
8. The patient ___ (send) to another hospital before we got there.
9. The second half of the nineteenth century ___ (witness) the first extended translation into English of the writings of Eliphas Levi.
10. All the worries they might have felt for him ___ (drive) off by the sight of his cheerful face.

Key:
1. comes 一般现在时，主语为不可数名词，谓语用单数
2. has expanded 现在完成时
3. has been 现在完成时
4. Standing 过去进行时的倒装形式
5. began 一般过去时
6. makes 一般现在时，动名词做主语，谓语用单数
7. has been living 现在完成进行时
8. had been sent 过去完成时的被动形式
9. witnessed 一般过去时
10. were driven 一般过去时的被动
2. 非谓语动词
2.1 动词主要时态和语态一览表
非谓语动词 形式 意义
现在分词
一 般 式 Doing 主动, 正在进行
被 动 式 being done 被动, 正在进行
完成主动式 having done 主动, 已经完成
完成被动式 having been done 被动, 已经完成
过去分词 Done 被动, 已经完成
动词不定式
一 般 式 To do 主动,将要进行
被 动 式 To be done 被动, 将要进行
完成主动式 To have done 主动, 已经完成
进行主动式 To be doing 主动, 正在进行

2.2. 非谓语动词作状语
•动词不定式：1）目的状语；2）结果状语
e.g. I came here to meet you. （目的）
He hurried to the rail station only to miss the train. （结果）
•分词：1) 伴随状语；2）原因状语；3）条件状语 4）让步状语；5）时间状语
e.g. Walking along the street, he met his old friend. （时间）
Being very tired, my father didn’t go out with us. （原因）
Made by hand, the silk shirt is very expensive. （原因）
Seen from the space, the earth looks like a blue ball. (条件)
2.3 非谓语动词，状语从句和独立结构
1) Having done their homework, the children began to play. (分词作状语)
2) After having done their homework, the children began to play. （连词+分词）
3) After they had done their homework, the children began to play. （状语从句）
4) With homework done, the children began to play. （独立结构）

2.4 非谓语动词作定语
1) If there is no choice, there is no decision ___ (make). (to be made)
2) Do you know the man ____ ( stand) in front of the house? (standing)
3) The question ____ (discuss) at the moment is very important. (being discussed)
4) The bridge ____ (build) in the 1950s is still in good condition. (built)

2.5 动名词和动词不定式
• 作主语和表语
动名词作主语/表语表示一般、抽象的情况；动词不定时作主语表示具体某次的情况。
e.g Rising early is good for health.
To rise early tomorrow is difficult for me.
It is difficult for me to rise early tomorrow.
My biggest wish is to go abroad.
Seeing is believing.
• 作宾语
接动名词作宾语的动词：
admit, acknowledge, avoid, appreciate, consider, delay, enjoy, escape, excuse, forgive, finish, include, involve, mind, put off, postpone, suggest, feel like, look forward to, be used to, be accustomed to, etc.
接动词不定式作宾语的动词：
want, tend, intend, pretend, hope, plan, expect, be supposed to, seem, be likely to, used to, be willing to, desire, force, prefer, start, begin

接动名词和动词不定式有不同含义的动词：
1) forget, remember, regret
2) stop, continue
3) need/ want
4) allow doing/ allow sb to do
(1) How can I forget meeting you for the first time?
Sorry, I forgot to lock the door.
(2) I can’t stop laughing. Can you stop to give me a hand?
(3) The grass needs cutting. The grass needs to be cut.
(4) We don’t allow smoking here. You are not allowed to smoke here.

历年考题中的非谓语动词
1. A man cannot be really happy if what he enjoys ___ (do) is ignored by society as of no value or importance.
2. Anyone ___(want) to understand the instry of the future will have to know about robotics.
3. It is a well-known fact that a person will move in a circle when he cannot use his eyes ___ (control) his direction.
4. As research techniques become more advanced, the number of animals ___ (use) in experiments may decrease.
5. It seems reasonable to assume that, other things ___ (be) equal, they would prefer single to shared rooms.
6. This poem, if ___ (translate) word for word into Chinese, will make no sense.
7. They may have their passports _____ (remove), making leaving or “escaping” actually impossible.
8. Her body, with hands and feet ____ (bind), was discovered by a traveler early in the morning.
9. I couldn’t help but ___ (feel) this is a very strange life.
10. Let us consider the earth as a planet ____ (revolve) round the sun.

Key:
1. doing 动名词做enjoy的宾语
2. wanting 现在分词作定语
3. to control 动词不定式作目的状语
4. used 过去分词作定语
5. being 现在分词用在独立结构中
6. translated 连词加过去分词作状语
7. removed 过去分词作宾补
8. bound 过去分词用在独立结构中
9. feel couldn’t help but 后接动词原形
10. revolving 现在分词作定语
3. 虚拟语气
第一大类：非真实条件下的虚拟语气
时间 从句 主句
与现在事实相反 did/ were should/could/would + do
与过去事实相反 had done should/could/would + have done
与将来事实相反 were to doshould do should/could/would + do
e.g. If I were you, I would be happy to do it.
If we had got the news, we could have prepared earlier.
If the job were to succeed, you should work harder.

第二大类：从句中用过去时或过去完成时的虚拟语气
1) would rather + 从句
2) wish + 从句
3) if only + 从句
4) as if/ as though + 从句
5) It’s time + 从句
e.g. I would rather you didn’t tell me the story now.
I would rather you had told me the story yesterday.

第三大类：从句中用should加动词原形的虚拟语气，其中should可省略。
1) suggest, propose, advise, move(动议), ask, order, require, request, desire, insist, prefer 等动词后接的宾语从句；
2) suggestion, proposal, advice, motion, order, requirement, request, desire, preference等名词后的同位语从句；
3) important, necessary, essential, imperative, desirable, advisable, preferable 等形容词用在it is … that…句型中；
4) lest, in case, for fear that 等引导的从句中。
e.g. It is suggested that the meeting (should) be put off.
It is my suggestion that the meeting (should) be put off.
It is necessary that the meeting (should) be put off.
He came to the office earlier lest he (should) miss the important meeting.

历年考题中的虚拟语气
1. If it hadn’t been for your help, we ___ (be) in real trouble. He would have given you more help, if he ___ (not be) so busy.
3. It is high time that we ___ (take) firm measures to protect our environment.
4. It was imperative that students ___ (finish) their papers before July 1st.
5. They demanded that the right to vote ___ (give) to every alt person.There was a mistake on my paycheck. I _____(receive) $10 more.I would rather he ____ ( buy) the house next year. The manager told us to be friendly to the visitors as if we ___ (meet) them before.
9. Should she come tomorrow, I ___ take her to the museum.
[A] can [B] will [C] would [D] must
10. If we ___ everything ready by now, we should be having a terrible time tomorrow.
[A] hadn’t got [B] didn’t get [C] wouldn’t have got [D] wouldn’t get

Key:
1. would have been 与过去事实相反的虚拟语气的主句
2. had not been 与过去事实相反的虚拟语气的从句
3. took It is high time +过去式的虚拟形式
4. should finish/finish It was imperative that+动词原形的虚拟形式
5. be given demand所接宾语从句用动词原形的虚拟形式
6. should have received 与过去事实相反的虚拟语气的主句，表示“本应该收到”而实际上没有。
7. bought would rather后接宾语从句，从句用过去式表示虚拟语气。
8. had met as if 所引导的从句用过去完成式表示虚拟语气。
9. C 与将来事实相反的虚拟语气的主句。
10. A 从句与现在事实相反，但本身已经是现在完成时（从by now可以看出），所以变为过去完成时。
结束语：
掌握语法题的要诀在于1）牢记上述表格；2）分清楚题目属于哪种具体情况；3）熟练套用正确形式；4）最后再检查一下是否应作必要的改动：如是否被动，三人称动词后加s，动词的不规则变化等。在理解上述表格的适用条件后，再通过大量作题来巩固，及时纠正出现的错误，我们一定能攻克语法难题，在语法部分得到一个理想的分数！
____…., …..
leave me _worrying__ (worry)
Leave the book _damaged__ (damage)
Enable me to solve the problem .
Enable the problem to be solved

I would rather not go with you.
I would rather I didn’t go with you.
It’s time it _was done_ (do) immediately.
It’s time to do it immediately.
He acted as if the book had been written (write) by him.

Command, demand
The order which/that is given by my boss is hard to carry out.
The order that the task should be finished (finish) today is hard to carry out.

1. Studies have shown ___ teenagers often suffer from depression.
A. that B. which C. in which D. in that
2. ____ driving around all day looking for somewhere to park, why don’t you take a bus to town?
A. In spite of B. Rather than
C. In place of D. other than
He hasn’t read one book _other than__ novels.
He has read no book other than novels.

3. In his composition there were no other errors ___ a few misspelled words.
A. except B. besides C. than D. beside
4. In deciding ___ a course of action, the candidates tried to estimate its likely impact on the voters.
A. how to pursue B. whether to pursue
C. how pursuing D. whether pursuing
5. The kids are ___ be hungry when they get home—they always are.
A. obliged to B. bound to C. desired to D. motivated to
6. It is said the conference is ____ (hold) in this hall next month. Is to be held
7. Little did they realize that they had made_ (make) an important discovery in science.
8. A life lived (live) without fantasy and daydreaming is a really poor life indeed.
9. They proposed that the chance (that is available to them) be explained____ (explain) in detail.
10. (They are afraid that) everything well prepared (prepare), they may still lose the game.
11. While compelled (compel) to make the decision in a hurry, he made the right choice.
12. He is said/known/reported to have made (make) a lot of money before he was thirty years old.

He is said to take the job next week.
He is said to have taken the job last week.

I find him to have made a lot of money…
He is found to have made…
He said he had made
13. He would like to buy a used_ (use) car instead of a new one.
14. Having been deprived of all his money, he had to find a job to support himself.
15. How can you explain the phenomenon that occurs (occur) again and again in our daily life?

『柒』 英语语法大全

初一英语语法用法复习大全
时间： 2008年11月13日 作者： 来源：网络

1. 形容词的用法：
形容词用以修饰名词，表示人或事物的特征。在句中可以作定语、表语，用于限定被修饰语的特征，如长短、大小、重量、颜色、高矮、胖瘦、新旧等，。
，“限定词”包括：冠词、物主代词、指示代词、或数词，它位于各类形容词前。它本身分为三位，即：前、中、后。前位限定词有all、half、both、分数和倍数；中位限定词有冠词、指示代词、物主代词等；后位限定词有基数词和序数词，但序数词位于基数词前。如:both my hands、all half his income等。“描绘”性形容词如：beautiful、bad、cold、great等。“大长高”表示大小、长短、高低等一些词。表示“形状”的词如：round square等。“国籍”指一个国家或地区的词。“材料”的词如：wooden, woolen, stone,silk等。“作用类别”的词如：medical, college，writing desk，police car等。
The little girl is very pretty. 这个小女孩很好看。
--I want that one. 我想要那个。
--Which one? 哪一个？
--The new blue one. 那个蓝色新的。
Can I have a look at the big nice one? 我能看一看那个大的漂亮的吗？
2、人称代词：
是用来表示人的代词，有单数和负数之分，有主格和宾格之分。人称代词的主格在句中作主语；人称代词的宾格在句中作宾语，是作动词或介词的宾语。
主格：I, we, you, he, she, it, they在句子中作主语
宾格：me, us, you, him, her, it, them在句子中作宾语
He and I are in the same class. 我和他在同一个班级。
Can you see them in the street? 你能看见他们在街上吗？
3、可数名词和不可数名词
英语中名词分为可数名词和不可数名词。凡是可数计数的名词叫做可数名词；凡是不可以计数的名词叫做不可数名词。
（1）可数名词分为单数和复数两种形式。可数名词前可以用不定冠词、数词或some many等修饰。如：a man a desk an apple an orange some books some children tow pens
（2）不可数名词没有复数形式，前面不能用不定冠词、数词或many等词语修饰，但可以用some a little much等词语来修饰。有时可以与一些量词短语搭配，这些量词短语中的名词一般是可数的，有单数形式，也可以有复数形式。如：some water a little milk much food a piece of bread tow bottles of ink some glasses of water
4、祈使句
祈使句用来表示请求、命令等，句中没有主语，肯定形式由谓语或者谓语+宾语（+宾语补足语）构成，否定形式则在句前加Don’t.
Stand up, please. 请起立。
Don’t worry. 别担心。
can的用法：
can是情态动词，表示“能，会，可以，被允许等”，其后接动词原形，否定形式为cannot，可缩写为can’t.
She can speak Japanese. 她会讲日语。
I can’t remember his name. 我不记得他的名字了。
Can you spell your name? 你会拼写你的名字吗？
5、现在进行时态：
概念：表示现在（说话瞬间）正在进行或发生的动作，也可以表示目前一段时间内或现阶段正在进行的活动。
结构：由be动词(am, is, are) + 动词ing构成，其中be动词要与主语保持性数一致。
Mary is flying a kite in the park. 玛丽正在公园里放风筝。
--What are you doing now?你现在在干什么？
--I’m reading English. 我正在读英语。
Are they drawing the pictures now?他们正在画画吗？
动词现在分词是动词原形变化而来的，规则变化如下：
动词ing形式叫动词现在分词，其构成如下：
1) 直接在动词后加ing
play—playing, do—doing, talk—talking, sing--singing
2) 以不发音的字母e结尾的动词，先去e，再加ing
make—making, write—writing, have—having, take—taking
3) 以重读闭音节结尾的动词且词尾只有一个辅音字母，应双写这个辅音字母，再加ing
run—running, stop—stopping, put—putting, swim—swimming
注意对现在进行时态的判断。判断一个英语句子用什么时态，主要看句子的时间状语，一般说来，每种时态都有与之相对应的时间状语。现在进行时表示现在（说话瞬间）正在进行或发生的动作。因此，这个时态最常用的时间状语是now；但有不少句子并没有now，只能通过提示语如look、listen等或者通过上下文来确定用现在进行时。
She is cleaning her room now. 她正在打扫房间。
Look! The girl is dancing over there. 看！那个女孩在那里跳舞。
--Can you go and play games with me? 你能和我们一起做游戏吗？
--Can’t you see I am doing my homework? 你没看见我正在做作业吗？
6、have/ has的用法：
1) 谓语动词have表示“有”，有两种形式：have和has，前者用于第一人称(I, we)，第二人称(you)和第三人称复数(they)，后者用于第三人称单数(he, she, it)或单数名词。
I have an apple and he has two bananas. 我有一个苹果，他有两个香蕉。
You have a new English teacher. 你们有了一个新的英语老师。
It has two big eyes. 它有一双大眼睛。
Julie and Jack have a nice car. 朱莉和杰克有一辆好看的车。
2) have/has句型与there be句型的比较：两者都表示“有”，但用法不同。前者表示所属关系，即表示“某人或某物有什么”，而后者表示存在，表示“某地有什么”。
They have some new books. 他们有一些新书。
There are some new books on their desks. 他们桌子上有一些新书。
She has a lot of pretty skirts. 她有很多漂亮的裙子。

『捌』 英语语法总结，所有的

一、非谓语动词

“非谓语动词”可分为动词不定式、动名词和分词。它在句子中的作用很多：除了不作谓语外，它可以充当主语、宾语、表语、定语、状语与复合宾语(主语补语或宾语补语)。有些及物动词后面接不带to的不定式作复合宾语。这些动词归纳如下：一感(feel)．二听(hear，listen to)，三让(have，1et， make)，四看(see，watCh，notice，observe)。再加上help somebody(to)do something和美国英语look at somebody do somthing。还有“二让”属特殊：get somebody to do something 与keep somebody doing。而有些及物动词后面接动名词(the -ing form)作宾语。这些动词归纳为一句话：Papa C makes friends。这是由如下动词的开头字母组成：permit，advise， practise，avoid,consider,mind, allow,keep,enjoy,suggest, finish，risk，imagine,escape,need，delay，stand(忍受)。 为了容易记住，也可以编成顺口溜：“允许完成练习，建议避免冒险，考虑延期逃跑，喜欢保持想象，需要反对忍受”。其相对应的动词依次是：permit/allow,finish,practise；
advise／suggest， avoid，risk： consider， delay， escape／miss； enjoy／appreciate， keep， imagine； need/want／require,mind． can't help／can’t stand。

二、复合句

1、学生最容易混淆的是定语从句与同位语从句的区别。

例如：A、The news that our team has won the match is true． (同位语从句)
B、The news that he told us surprised everybody here． (定语从句)

关键的区别在于连接或关系代词that：有意义的是定语， 无意义的是同位。因为引导定语从句的that在从句中作主语或 宾语，而引导同位语从句的that只起到连接词的作用。

2、接着容易混淆的是引导定语从句的关系代词that与 which：that之前是不定(代词)、序数(词)、(形容词)最高级：which之前是介词短语与逗号(非限制性)。

例如：A、All that we have to do is to practise every day．
B、The first lesson that I learned will never be forgotten．
C、I have lost my pen，which I like very much.
D、The house in front of which there is a garden is my home．

三、It的用法

1、It除了代替人和物以外，还可以作形式主语。而真正的主语(不定式、动名词或从句)则放于谓语或表语之后。

例如：It is nor easy to finish the work in two days.

然而有少数表语之后接动名词作真正的主语。这些表语是：无助(no help)、无用(no use)、没好处(no good)；工作(hard work)、费时(a waste of time)、又危险(a danger)。

例如：A、It is no use crying over spilt milk.
B、It is a waste of time waiting for him．

2、It还可以作形式宾语。通常下列动词后面可接it作形式宾语：2f2tcjm(find，feel,think,take,consider，judge, make)。

例如：A、He made it clear that he was not interested in this subject．
B、I think it no use arguing with him.

3、It用于强调句式。要强调句子的某一部分(主语、宾语、 状语)，可以把it当作先行词。这种句子的结构是：It is(was)+ 被强调部分+that(who)+句子的其余部分。

例如：A、It iS Professor Lin who teaches us English—(强调主语)
B、It was in Shanghai that l saw the film.—(强调状语)
C、It was in 1990 that I worked in the factory．(同上)

但要注意与定语从句的区别。
例如：D、It was 1990 when I worked in the factory．(定语从句)

在强调句式里，我们把强调结构It is(was)…that除去，句子还很完整。如例句C。而例句D就不能。

四、倒装结构

学生容易混淆的是全部倒装与部分倒装。如何区分之，编个顺口溜：副(adv.)介(prep．)提前全倒装，其它句式部分倒；否定提前倒助动，让步状语倒表语；复合句式倒主句，不
倒装的属特殊。下面举例说明：

A、Here comes the bus．(副词提前，全倒装)
B、Here he comes.(代词作主语，不倒装)
C、In front of the house lies a garden.(介词短语提前，全倒装)
D、Never shall I do this again.(否定词提前，部分倒装)
E、Young as he is ,he knows a lot.(让步状语从句，表语倒装)
F、Only when he told me did I realize what trouble he was in．(only 修饰状语，主句倒装)
G、Only he can save the patient.(only修饰主语．不倒装)
H、Not only will help be given to people,but also medical treatment will be provided.(否定词提前，部分倒装)
I、Not only he but also we like sports.(连接两个主语，不倒装)

五、虚拟语气

虚拟语气也是一个难点。所谓虚拟语气是表示说话人的愿望、假设、猜测或建议，而不表示客观存在的事实。它通过句子的谓语动词的特殊形式来表示。现归纳如下：纯假设，用虚拟，动词时态退一级：条件句，分主从，主句谓语前加would (should,could，might)；表愿望,用虚拟，wish后面接宾语(从句)：现在过去与将来，动词时态退一级：提建议，用虚拟，宾语(从句)动词用(should)do：俩建议，三要求，再加坚持与命令(suggest,advise,demand,require,request,insist,order)：It is time和eoukd rather,后接丛句用虚拟：部分主语从句中， 谓语用虚拟结构 (It is necessry /important/natural/natural/strange/strange that……should do)。 下面举例说明：

A、If you came tomorrow,we would have the metting. (条件句虚拟)
B、Without air,there would be no living things.(同上)
C、We wish we had arrived there two hours earlier.(表示愿望虚拟）
D、He demanded that we (should)start right away.(表示建议虚拟)
E、It is(high)time that we left (should leave)now．(特殊从句虚拟）
F、I would rather you gave me the book．(同上)
G、It is necessary that we should clean the room everyday，(主语从句虚拟)
H、He speaks English so fluently as if he were English． (特殊从句虚拟)