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逗号在英语写作的意义

发布时间:2021-02-27 11:49:52

1. 英语中逗号起什么作用

方便阅读啊如果没有句号的话一长句话看起来会很吃力就像现在一样
句号用于分隔句子,逗号不能连接两个句子,除非使用连词。逗号通常用于并列,递进,顺承等关系。

2. 英语中的逗号有什么作用

楼主:你好,我将全部标点的用法整理如下,互相切磋!

标点符号

一、所有格符号(')

所有格符号与s连用表示所有格,例如:

the dog's bone 狗的骨头

the princess's smile 公主的微笑

King Charles's crown 或King Charles' crown查理王的王冠

all the students' books 所有学生的书

the men's jackets 男人的夹克(不规则的复数)

所有格符号用于缩略形式表示字母或数字的省略,例如:

I'm (= I am)

he's (=he is/has)

they'd (=they had/would)

the summer of '68 (=1968) 1968年夏季

所有格符号有时与 's'连用构成字母、数字或省略语的复数,例如:

ring the 1960's在二十世纪六十年代

all the MP's所有国会议员

pronounce the r's more clearly把'r'的音发得更清楚些。

二、冒号(:)

冒号用在表示一组或一类的词或连接短语(如as follows, in the following manner)之后,以介绍一系列项目,例如:

His library consists of two books:the Bible and Shakespeare.

他的藏书有两部:《圣经》和莎士比亚的著作。

Proceed as follows: switch on the computer, insert a disk and press any key.

按如下步骤操作:打开计算机开关,插入软盘,然后按任意键。

正式用语中,冒号用在说明或解释主句的从句或短语之前,例如:

The garden had been neglected for a long time: it was overgrown and full of week.

花园长期无人照料:里面植物蔓生而且长了杂草。

Note:

分号或句号可代替冒号使用,但逗号不行。

三、逗号(,)

逗号用来分开一系列的词、短语或从句,例如:

If you keep calm, take your time, concentrate and think ahead, you'll pass your driving test.

如果你保持镇定,不着急,集中精力注意前面,你就会通过驾驶测验。

Note:

逗号一般不在and之前使用,例如:

a bouquet of red, pink, yellow and white roses.

一束红的,粉红的,黄的和白的玫瑰花。

逗号经常用于状语从句或很长的短语与主句之间,例如:

When the sun is shining and the birds are singing, the world seems a happier place.

当阳光照耀鸟儿在歌唱的时候,这个世界似乎是一个更快乐的地方。

In the gales this autumn, many trees were blown down.

今年秋天刮了一场又一场大风,许多树被风刮倒了。

逗号用于句首的非限定性动词的从句或没有动词的从句之后,例如:

To be sure of getting there on time, she left an hour early.

为了准时到达那里,她提早了一小时离开。

Worn out by their experiences, the children soon fell asleep.

孩子们在经历这一切之后极度疲劳,很快就睡着了。

逗号用来将一引导性的或转变语气的词或短语(如therefore, however, by the day, for instance, on the contrary)与句子的其余部分隔开,例如:

Oh, so that's where it was!

哦,它原来就在那里!

As it happens, however, I never saw her again.

然而事情不凑巧,我自那以后从未见过她。

He is unreliable and should, for this reason alone, be dismissed.

他很不可靠,只这一条理由即可把他开除。

逗号用于插在句中的从句之前,例如:

The fire, although it had been burning for several days, was still blazing fiercely.

虽然一直烧了好几个小时,但火势仍很凶猛。

You should, indeed you must, report this matter to the police.

你应该,说实在的你必须,把这件事向警方报告。

逗号用在进一步说明其前面的名词的非限定性定语从句或同位短语前后,例如:

The Pennine Hills, which are very popular with hikers, are situated between Lancashire and Yorkshire.

宾南山脉位于兰开夏郡和约克夏郡之间,是远足的人所喜爱的地方。

Mount Everest, the world's highest mountain, was first climbed in 1953.

埃佛勒斯峰(即珠穆朗玛峰)为世界最高的山峰,1953年首次有人攀登。

Note:

限定其前面的名词的定语从句前后均不用逗号,例如:

The hills that separate Lancashire from Yorkshire are called the Pennines.

把兰开夏郡与约克夏郡分开的山脉叫宾南山脉。

逗号有时用来分隔由一连词(如and, as, but, for, or)连结的(尤其长的)并列从句, 例如:

He had been looking forward to our camping holiday all year, but unfortunately it rained every day.

一年来他一直在盼望着利用假日去野营,但不幸的是每天都下雨。

逗号用来把附加问句或类似的词或短语与句子的其余部分隔开,例如:

It's quite expensive, isn't it?这东西很贵,是吧?

You live in Bristol, right?你住在布里斯托尔,对吧?

四、会话

一般说, 说话的人每换一位时都另起一段,例如:

'You're sure of this?' I asked.

He nodded grimly. 'I' m certain.'

"这一点你肯定?"我问道。

他很有把握地点点头"我肯定。"

所有的词和标点符号都放在引号内,例如:

'We must hope,' he replied wearily, 'that things will improve.'

Note:

英国常用单引号:'Help!',美国则一般用双引号:"Help!"。把一个发言人的长篇讲话分成若干段段落时,每一段的前面和讲话结束时用引号,但中间段落的末尾不用引号。

话语的标志(如he said, she told me, they complained)与所说的话用逗号分开,除非他用了问号或感叹号,例如:

'That,' said Nick, 'is all I know.'

Nick said, 'That's all I know.'

'Why?' asked Nick.

引语内的引语用逗号引导,并且如外面为单引号则放在双引号内,例如:

'When the judge said, "Not guilty", I would have hugged him.'

'法官说“无罪”时,我都想拥抱他了。’

表示犹豫或被打断的话语用破折号或三个点(省略号)表示,例如:

'Pass me -- I mean, would you mind passing me the salt, please?'

His dying words were, 'The murderer was ...'

五、破折号--

在非正式用语中,破折号用来代替冒号和分号,以标出对前面叙述的总结或结论,例如:

Men were shouting, women were screaming, children were crying -- it was chaos.

You've admitted that you lied to me -- how can I trust again?

在非正式用语中,单一或成双使用破折号,以将额外说明,事后的考虑或评论与句子的其余部分隔开,例如:

He knew nothing at all about it -- or so he said.

Winters in the Mediterranen -- contrary to what many people think -- can be very cold.

但是,在正式用法中,用括号或逗号代替破折号。

六、省略号...

参见会话部分。

七、感叹号!

感叹号用于句尾表示极大的愤怒,惊异、喜悦或其它强烈感情。

例如:

What wonderful news!多么令人惊喜的消息!

'Never!' she cried. '决不'她大声说。

Note:

在非正式尤其在戏谑语中,有时使用两个或两个以上的感叹号或使用一个感叹号加一个问号。

"You wife's just given birth to triplets.' 'Triplets!?'

‘你妻子刚生下三胞胎。’‘三胎胞!?’

八、句号.

句号用在表示既不是直接引语又不表示感叹的句子的结尾,例如:

I knocked at the door. There was no reply.

句号有时用于缩略语中。如:Jan. 一月; e.g. 例如; a.m.上午。

九、连字符-

连字符可用于复合词:

1.连字符有时用来构成由两个不同的词组成的复合词,例如:

hard-hearted; radio-telescope; fork-lift truck

2.连字符用来构成由前缀和专用名词组成的复合词,例如:

pre-Raphaelite; anti-Nazi

3.连字符用来构成由两个被介词分开的词组成的复合词,例如:

mother-in-law; mother-to-be; mother-of-pearl

4.连字符用来改变由连字符连结的复合词的第一部分,例如:

common to both pre- and post-war Europe

5.连字符用来构成由两个或更多的专用名词组成的用作定语的复合词,例如:

the Reagan-Gorbachev summit

services on the London-Bahrain-Hong kong route

6.连字符用来写出21到99的复合数字,例如:

seventy-three; four hundred and thirty-one.

连字符(尤用于英国)有时用来隔开前缀与后面的词,这个前缀的尾字母与它后面的那个词的首字母为同一元音,例如:

co-ordination; re-elect; pre-eminent

连字符用在一行之末把词断开,例如:

... in order to avoid future mis-

takes of this kind.…

连字符用在两个数字或日期之间,以便包括其间的所有数字或日期,例如:

pp 106-131 从106页至131页

a study of the British economy, 1947-63 1947年至1963年英国经济研究

十、括号()

括号可用来将额外说明,事后的考虑或评论与句子的其余部分隔开,例如:

Mount Robson (12,972 feet) is the highest mountain in the Canadian Rockies.

罗伯逊峰(12972英尺)是洛基山脉在加拿大境内的最高峰。

He thinks that modern music (ie anything written after 1900) is rubbish.

他认为现代音乐(即1900年后创作的所有音乐)都是胡闹。

括号可用来括起相互参照的说明,例如:

This moral ambiguity is a feature of Shakespeare's later works (see Chapter Eight).

这种道德暧昧是莎士比亚晚期著作的一个特征(见第八章)。

括号也可用来括起号码和字母编号,例如:

Our objectives are (1) to increase output, (2) to improve quality and (3) to maximize profits.

我们的目标是(1)增加产量(2)提高质量,(3)最大限度地提高利润。

十一、问号?

问号直接用在问句末尾。

例如:

Where's the car?

You're leaving?

但是,在间接问句末尾,不用问号,例如:

He asked if I was leaving.

问号用在括号内表示怀疑或不确定,例如:

John Marston (? 1575-1634) 约翰·玛斯顿(?1575-1643)

十二、引号"" ''

引号用来括起直接引语的全部话语和标点,例如:

"What on earth did you do that for?" he asked.

'I won't go.' she replied.

'Nonsense!'

引号用来使人注意行文中的特殊用语(如技术词汇,俚语,或为产生讽刺的特殊效果而使用的词语),例如:

Next the dough is 'proved' to allow the yeast to start working.

He told me in no uncertain terms to 'get lost'.

Thousands were imprisoned in the name of 'national security'.

引号用于括引文章,短诗,广播电视节目的名称,例如:

Keat's 'Ode to Autumn'

I was watching 'Match of the Day'.

引号用来括引短的引语或谚语、俗语,例如:

'Do you know the origin of the saying "A little learning is a dangerous thing"?'

‘你知道“肤浅的了解会很危险”这一的谚语的出处吗?’

十三、引语

一条短的引语由逗号与引导词分开,并置于引号内,例如:

It was Disraeli who said, 'Little things affect little minds'.

较长的引语用冒号与引导语分开,并以缩格或隔行的办法与文章的其余部分隔开,例如:

As Kenneth Morgan writes:

The truth was, perhaps, that Britain in the years from 1914 to 1983 had not changed all that fundamentally.

Others, however, have challenged this view...

引语中省略的词或短语用省略号表示:加在引语中的词或短语(如为了使省略后语法保持正确)放在方括号内,例如:

challenging Morgan's view that 'Britain in [these] years ... had not changed ...'

十四、分号;

分号用以代替逗号,隔开已经由逗号分开的句子部分,例如:

She wanted to be successful, whatever it might cost; to achieve her goal, whoever might suffer as a result.

她希望成功,不管代价如何;她希望实现自己的目的,不管谁会因此遭受痛苦和困难。

在正式用法中,分号用来分隔分句,特别是没有连词连结的分句,例如:

The sun was already low in the sky; it would soon be dark.

太阳已经西沉;夜幕很快就要降临。

He had never been to China; however, it had always been one of his ambitions.

他从未到过中国;但到中国一直是他的抱负。

十五、斜线号/

斜线号用以分开可选择的词或术语,例如:

Take a mackintosh and / or an umbrella.

I certify that I am married /single/ divorced.

在几行诗歌不断行连写时,斜线号用以表示一行的结束,例如:

Wordsworth's famous lines, 'I wandered lonely as a cloud / That floats on high o'er vales and hills...'

华兹华斯的名句,‘独自漫游似浮云、青山翠谷上飘荡…’

十六、方括号〔〕

方括号用以括起编辑人员的评语,例如:

...constant references in her diary to 'Mr G [ladstone]'s visits'...

她日记中不断提到‘格[拉德斯通]先生的访问’

加在引语中的词或短语(如为了使省略后语法保持正确)放在方括号内,例如:

...challenging Morgan's view that 'Britain in [these] years ... had not changed ...'
参考资料:很多,慢慢看哦

3. 关于英语的逗号

这样就对了:
Hello everybody!
I like applesbut I dont like banbanas.
For girls, we have skirts.
Last night I read a book.
英语中常见的逗号用法

用在由并列连词连接的两个平行词句之间,连词可说出,也可省略:

1.a.用在平行的词之间:

A good house,a good car,a good wife are what he wants. [名词并列,主语](noun,compound-subject)

I can read light,serious,amusing,or profound works of English authors. [形容词并列,修饰宾语](adjective,objective)

Do you see that tall,big,husky fellow? [形容词并列,修饰宾语](adjective,objective)

Butterflies flew before,behind and above the huts. [介词,构成状语](preposition,adverbial)

He is honest,but silly.[形容词并列,表语](adjective,predicative)

I like this,rather than that.[名词+并列同置](noun,apposition,object)

但:He is an English grammar teacher.It is a diamond wedding party.It is a Chinese New Year celebration.

b.注意写法:

Music,painting,and poetry are all interesting to him.(美国英语中and前多加逗号)

Music,painting and poetry are….(正确,英国多这样写。)

Music,painting,and poetry,are….(不好)

c.逗号可由and,or,nor代替:

Music and painting and poetry are…

Neither music nor painting nor poetry is…

d.逗号须用在etc.,and so on,and the like的前面和后面:

Music,painting,poetry,etc.(or and so on,and the like),are….

e.逗号须用在重复的词前:

What I need is money,money,money.

Long,Long ago and far,far,far away there was a king.

2.用在平行的短语之间:

You can meet him at church,at school,or on the street.

I went to talk with him,to return the book,but not to see his sister.

Reading English.speaking it,and writing it are different processes.

3.用在并列的分句之间:

He has learned Japanese for years,but he does not know it.

He must come back as soon as possible,or I cannot wait.

He was tired,so he took a rest.

He is very ill,so he does not go to school.

He seems to be very ill,for he looks so pale.

但由but,and,or连接的简短分句之间可以不加逗号:

He is silly but his sister is clever.

John studies art and I study science.

4.用在由or,and或but连接的两对知识之间:

You can go by night or by day,by sea or by land.

He is honest but clever,thin but hard-working.

5.如果两个相似结构共有一个宾语,逗号须要用在第二个结构的前面和后面:

He depends on,and is trusted by,his uncle.

He did it in accordance with,and in defence of,the law.

She is fond of,but seems poor in,her homework.

He loves,or pretends to love,his wife.

—但在一个短的不强调的词前后不加逗号:

He was murdered inside or near the jungle.

6.用在插入词的前面和(或)后面:

a.用在yes,no,sure,personally,probably,certainly, usually;in general,in the first place,in my opinion,in any case,as a matter of fact;strictly speaking

这类修饰语的后面 :

Unfortunately,Mary caught cold yesterday.

Inevitably,he will be sent to prison.

On the whole,he is a nice fellow.

Generally speaking,New York is a nice place.

—用在句子修饰语的前面和后面:

Tom,in the first place,must respect his parents.

Jimmy,I must say,shouldn't listen to the rumour.

b.用在furthermore,similarly,accordingly,anyway, otherwise;above all,in the same way,in other words,in contrast这类连接副词(短语)的后面:

He lost lots of money;as a result,he got sick.

He is sick;therefore,he must rest.

I do everything;in addition,I must not complain.

Liza is noisy;Tim,by comparison,is quiet.

I am too busy;Bill,on the other hand,fools about.

7.a.用在句子开头的分词(短语)之后:

Seeing the police,the thief began to run away.

用在句子开头的不定式(短语)之后:

To earn more money,the boy worked harder.

b.用在松松地插在主语后面的短语的前面和后面:

The thief,seeing the police,began to run away.

Plants,with enough water and sunshine,will grow fast.

The boy,to earn more money,worked harder.

但是:The thief seeing the police began to run away.

(还有其他没看见警察的小偷,这里的分词短语为限制性定语,而前面句子中,逗号后的分词短语为非限制性(或解释性)分词,带状语性质。)

The house on the opposite side is my uncle's.

The boy to earn more money worked harder.(There were other boys who did not have to earn more.)

c.用在句末的非限制性(解释性)分词(带状语性质)前面:

He sat in a chair,reading papers.

但在句末的不定式前不宜用逗号:

He sat down to read papers.

8.用在呼语的后面或(和)前面:

John,come here.

Come here,John.

What,John,are you doing?

9.用在句子开头的副词短语后(也可不用):

At eight(,) he goes to the office.

Thanks to his help(,)I got a good job.

但句子末尾的副词(短语)前不宜用:

He goes to the office at eight.

I got a good job through his help.

10.用在主句与从句之间:

用在一个非限制性定语从句(相当于一个并列分句)前:

I asked a boy,who(=and he)kept silent.

He went to France,where(=and there)he planned to see her.

但:I asked the boy who kept silent.(There were other boys who did not keep silent.这里的定语从句是限制性的。)

He went to the city where he planned to live a year or two.

11.用在引话动词(如said,replied)及直接引语之间:

He said,“You are wrong.”

—用在引话动词和半直接引语(不带引号,第一个字母大写)之间:

He replied,She was wrong.

—用在插在直接引语中间的he said这类词句的前面和后面:

“In the morning,”he said,“I don't feel well.”

—在引话动词和由that引起的间接引语之间不用逗号:

He thought that she was wrong.

—引话动词及由疑问词引起的间接引语之间也不用逗号:

He knows what she said.

It may be asked whether anyone could stand the insult.

12.a.用在状语从句之后,主句之前:

If you are careful,you will make fewer mistakes.

Since he is ill,he cannot work.

When it was raining,he came to me.

b.若主句在前,状语从句在后,主、从句之间一般不加逗号:

You will make fewer mistakes if you are careful.

I love her just because she looks pretty.

He works hard so that he may succeed.

John speaks Chinese better than Lee speaks English.

但是:You will make fewer and fewer mistakes in your composition,if you are careful enough.(如果主句较长,主句后可以加逗号。)

I will ,if I can.(如果状语从句需要强调,前面也可以加逗号。)

He will come,only when he needs your help.

13.用在较长的主语和它的谓语之间:

That the city had been lost to the enemy,was true.

Studying every evening after the office hours for the past ten years,enabled him to know French and German.

14.用在同位语前面:

用在一个专有名词和它的普通名词同位语之间:

John,my brother;William Shakespeare,the greatest poet of England;London,the capital of England.

但在一般名词和特别名词之间不宜加逗号:

the word“flame”,the year 1942,the historian Herodotus 〔但a great historian,Herodotus〕,my brother John,our greatest poet William Shakespeare,William Shakespeare's tragedy Hamlet,the question “to be or not to be”,the idea that man is mortal

在下面这类名称中也不加逗号:

Alexander the Great,John the Baptist,Richard the Lion- hearted,Henry the Fifth

不过,在人名后的尊称或学术头衔前可加逗号:Mr. John Lee,Senior;Mr.John Lee,Ph.D.

15.用在较小部分和较大部分之间:

—用在街名、房间或公寓号码,城镇名、州名及国名之间(但门牌和街名之间不用):

138 Liberty Street,Room 408,Fresno,California, USA

—用在日期中(但月份和日期之间不用):

Sunday,July6,1960.

—用在数字中:

6742856135(=six billion…two million…six thousand…)

654321(4=4 thousand)(但在654321这个数字中,4=4)

—用来代替of:

President Do,Far East University

16.用在某些词后,表示停顿,以防止误解:

Outside,the streets are wet.

Such boys as you,are not to be found elsewhere.

He is eating,mummy.

Ever since,he has been very ill.

Whoever wished to escape,escaped into the jungle.

17.和分号一道表示某些重复的词已被省略:

John has one;Mary, two.

但:John has one,Mary two.

Reading makes a full man;conference,a ready man.但:Reading makes a full man,conference a ready man.Egyptians give us agriculture;Romans,law.

My father takes care of John;my mother,Mary.

Painters express their feeling by forms and colours;musicians,by sounds;poets,by words.

18.用在句子中倒装部分(提前的部分)的后面:

That man,I have known for many years.

The war is over,I am glad to say.

It is vicious,that dog of yours.

John is a young man,honest,kind and intelligent.

19.用在右上角自己的地址及日期中:

645 Beal Street,

New York,NY 11109.

February16.1970.

用在左上方收信人的地址中:

Mr.James Read,

68 St.James Road,

Hongkong.

用在称呼语中:

Dear Sirs,(或不加标点)(英式)

Gentlemen:(正式)Dear John,(非正式)(美式)用在结尾的客套语中:

Sincerely yours,(或Faithfully yours,[美国很少这样说])David White.

注:在双方地址中每行末尾的逗号或句号均可省略。
晓篱 敬上

4. 英语写作 一个单词 逗号 一句话

每句话的第一个字母大写,句号的才是一句话.出现逗号并不是一句完整的话,所以不用大写

5. 英语什么时候用逗号在英文写作中什么时候用逗号

一般的话在句中用,在用句号的时候要特别注意,不像汉语,英语中是一个点

6. 英语逗号的用法

英语逗号的用法:

用逗号连接两个句子的时候,必须加连词,因为一个主句不能有两个谓语,除非加了连词把它变成并列句或者主从句

如果想把这个句子继续写下去但又不想加连词,还可以加分号,这两个半句之间没有连接关系但依然是一句话。因为加了分号之后这两句还是一句话,所以分号后面不用加主语。

除此之外就得加句号。

(6)逗号在英语写作的意义扩展阅读

汉语中逗号的用法:

1、句子内部主语与谓语之间如需停顿,用逗号。

例如:我们看得见的星星,绝大多数是恒星。

2、句子内部动词与宾语之间如需停顿,用逗号。
例如:应该看到,科学需要一个人贡献出毕生的精力。

3、句子内部状语后边如需停顿,用逗号。

例如:对于这个城市,他并不陌生。

4、复句内各分句之间的停顿,除了有时要用分号外,都要用逗号。
例如:据说苏州园林有一百多处,我到过的不过十多处。

5、用来分开句内各词语或表示语气的停顿。
提示:“,”不可放在一行之首或开头。

6、并列词语之间带有“啊”“呀”“啦”等语气助词时,并列成分之间用逗号,不用顿号。
例如:八月的大街上摆满了水果,像甜瓜啊,西瓜啊,苹果啊,葡萄啊......

7、并列成分做谓语时,如果并列成分是主谓结构,那么并列成分之间用逗号。
例如:她衣服新潮夺目,头发齐耳根长,走起路来风风火火,讲起话来大声大气。

7. 英语句子中逗号的作用

逗号当然是表示句子的分层了。在这句话中一共有三个并列的谓语,分别是:place,punish,affect.
通常英语中当并列超过两个时,都会用这样的结构。如:
A,
B
and
C.
也就是说只有最后两个才会用and,前面的都是用逗号的。不知道这样说你明白了没有。

8. 逗号的意义是什么

逗号的作用是把句子切分为意群,表示小于分号大于顿号的停顿。逗号在内汉语及大多数外容语是使用频率最高的标点符号,朝鲜语使用句号多于逗号属于特殊情况。逗号的用途最广泛,用法最灵活,因此也最难掌握。比较和分析国内外有关资料的说法,有助于了解逗号的主要功能。

9. 英语中逗号和连词的作用

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、非谓回语动词答、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。
逗号没有连词的作用的

10. 逗号在英语一句话中的作用有什么

1)把非谓语动词做伴随状语的部分,用逗号和句子的其他部分分开。
2)非谓语动词中分词的独立结构,用逗号和句子的其他部分分开。
eg.The content of tomato sauce cooked in an iron pot for three hours showed a striking increase,the level going up nearly 30 times.在这里the level going up nearly 30 times做独立结构,用逗号和句子的其他部分分开。
3)分词短语可做非限定性定语,用逗号和句子的其他部分分开。
eg.But the buffalo nickel,proced from 1931to 1938,honored a pair of connected tragedies from the settlement of the American frontier---------.在这里proced from 1931to 1938做非限定性定语,修饰the buffalo nickel,用逗号和句子的其他部分分开。
4)在状语从句中,用逗号把从句和主句分开。
5)把两个用and或but连接的完整句子,用逗号在and或but前分开。
6)把两个或两个以上并列的平行成分,用逗号隔开。
I reach for the light switch,and as it silently lights the scene,I return to bed to observe the patient with an unemotional,medical eye.在这里第一个逗号是and 连接两个完整的句子,第二个逗号是把as引导的时间状语从句的从句和主句分开,第三个逗号是把两个或两个以上并列的平行成分,用逗号隔开。
7)在非限定性定语从句中,用逗号把从句和主句分开。
eg.The only light in her room is coming from a piece of medical equipment,which is flashing its red light sa if in warning.
8)把插入语,用逗号和句子的其他部分分开。
eg.And people who are likely to have low iron should avoid drinking coffee and tea with meals,she says,since substances in these drinks can interfere with iron being absorbed into the body. she says是插入语。
9)把句子的同位语,用逗号和它前面所解释的名词或名词词组分开。
eg.The first and most common is having low iron reserves,a condition that tapically has no symptoms.在这里a condition ---做同位语解释 low iron reserves,用逗号和它前面所解释的名词或名词词组分开。
10)把句子中的独立成分,用逗号和句子的其他部分分开。
以上几种逗号的作用并不是独立的,有时在一句话会用到上面好几种逗号的作用。如下面这个句子:
And there are others who say their suspicions were aroused over time,as the 55-year-old Mr.Williams,who appeared on weekends turned out in fine suits,bought up property after property,providing such a large injection of cash into the village that he single-handedly brought the community back to life.在这里第一个逗号是把asas引导的原因状语从句的从句和主句分开。第二个逗号是who引导的非限定性定语从句中,用逗号把从句和主句分开,这里也可以把who appeared on weekends turned out in fine suits看成插入语,用逗号和句子的其他部分分开。最后一个逗号是把非谓语动词做伴随状语的部分,用逗号和句子的其他部分分开。
以上例句均选自新视野大学英语3中的句子。
恳切希望众位朋友批评指正,使其变得更加完美谢谢!

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