但是今天我想借这个机会给大家总结怎样在英语环境下使用标点符号。以前在批改学生作业，或帮朋友修改文章时看到很多标点符号误用。误用标点符号在英语为母语的人面前，或在国际

各个英语国家，不同的机构会使用不同的标点符号格式。以下要提出的，是美联社的标点符号用法。

Apostrophes 省略号　（'）

在语境下表by和for的情况下不用省略号

例：The teachers strike is in its third week. (the strike by teachers)

    The freelancer bought a writers guide. (a guide for writers)

年代省略

例：Russell was born in the mid-'50s.若省略前两位数字用省略号

    The 1960s were a turbulent decade. 代表一个十年的四位数字不用省略号。

Colons 冒号　(:)

介绍一个概念和一个想法。若冒号后的句子介绍独立的概念并且是完整的句子首个字母要大写。

若是介绍目录、名单或明细表首个字母不需要大写。

引出一句以上的引言用冒号

例：The coach said: "The loyalty of the student body means  lot to me. I will finish my contract and not entetain offers fromother schools."

Commas 逗号　（,）

分隔一系列（至少有三个词或词组）

例：1.The appetizer included carrot sticks, olives, and cheese and crackers.

    2. The appetizer included cheese and crackers, carrot sticks and olives.

注意：当最后一个词组含有连词and时，在倒数第二个词组后，和词组后的and之前加逗号。见例句1。

分隔从属一个主语，意义分别独立的词组

例：Feed a cold, starve a fever.

    We saw it, we wanted it, we bought it.

长的介绍性短句（多于三个词）后用逗号。短的介绍性短句（等于、少于三个词）不用逗号。

例：When Jane left her husband of 20 years, she felt said.

    When Jane left she felt sad.

    In 1999 Jane left her husband of 20 years.

分隔重要性等同的形容词

例：Jana inherited a colorful, old carpet.

    Jana inherited an old, colorful carpet.

若一句话中只有一个主语，and附近不需要逗号。

例：I finished studying and then went to a movie.

若一句话中有and两部分意义连接紧密，并且主语一致不需要逗号。

例：I finished reading the book and then I called my sister to talk about it.

若一句话中有and两部分意义连接不紧密，并且主语一致需要逗号。

例：I finished reading the book, and then I called my sister.

from: