英语里逗号的使用规则精编版

COMMA （逗号）
1. In a Series –Place a comma between three or more items connected by
a coordinating conjunction
(在一系列——三个或三个以上项目之间放置一个逗号由并列连接词连接)
Caution: Do not place commas between two items separated by and or between three items separated from one another by ands.
(警告:两个项目之间不加逗号隔开或由and三个项目之间彼此分开)
Incorrect(错误的)：
Correct:
Remember to place a comma before the coordinating conjunction joining the last two elements of the series. Otherwise, the intended meaning of the sentence may not be clear.
（记得把逗号并列连接词前加入的最后两个元素系列。

否则,句子的含义可能不清楚。

）Confusing：
Confusing：
2. Between Coordinate Adjectives –Place commas between equal adjectives with no coordinating conjunction between them.
（之间协调的形容词——与不平等的形容词之间加逗号协调它们之间的结合。

）
Example:
Incorrect:
3. Before FANBOYS between Independent Clauses in Compound Sentences
（之前粉丝复合句句子独立子句之间的）
The war lasted for two years, but very few people supported it.
（战争持续了两年,但是很少人支持它。

）
Caution: Do not place a comma between two items with FANBOYS when one item is not a complete sentence.
（警告:不要将两个项目之间的逗号粉丝当一个项目不是一个完整的句子。

）Incorrect:
Caution: Do not place a comma after the FANBOY.
Incorrect:
Note: The comma may be omitted between independent clauses if a sentence is very short.（注:独立子句之间的逗号可以省略,如果一个句子很短。

）
Example:
4. Nonessential Adjective Clauses / Nonessential participial phrases - Separate
unneeded adjective clauses and participial phrases from the rest of the sentence. （不必要的形容词子句/不必要的分词短语--单独的不必要的定语从句和分词短语句子的其余部分）
Caution: Do not separate needed adjective clauses and participial phrases from the rest of the sentence.
（警告:不区分定语从句和分词短语与句子的其余部分。

）
Incorrect:
5. Introductory Elements - Place a comma after certain introductory elements.
(介绍元素——一些介绍性的元素后面加逗号。

)
A. Long prepositional phrases or a succession of prepositional phrases
Examples:
Note: With short introductory prepositional phrases, the comma is optional.
(注意:简短的介绍性的介词短语,逗号是可选的。

)
Examples:
B. Participial phrases(分词短语)
Examples:
C. Gerunds as objects of prepositions（动名词和介词的对象）
Example:
6. To separate Interrupters （分离的打扰者）
A. Parenthetical expressions and transitions (in my opinion, unfortunately, moreover, of course, as a matter of fact, indeed, for example, etc.)
括号表达式和转换（在我看来,不幸的是,此外,当然,事实上,事实上,例如,等等） Example:
B. Nonessential Appositives (renamers) 不必要的并列
Example:
Caution: Do not separate essential appositives with commas.
（警告:不要单独用逗号appositives至关重要。

）
Incorrect:
In the above example, the appositive is essential since there is more than one daughter. Therefore, do not place commas around the appositive.
（在上面的例子中,同位语是至关重要的,因为不仅仅是一个女儿。

因此,不加逗号同位语。

）
Correct:
7. Nonessential Examples Introduced by such as, especially, particularly
（特别是引入不必要的例子如,特别是）
Examples:
（表达式的对比）
9. Dates and Addresses - When a date or address with several parts occurs in a sentence, place a comma between each element and after the last part.
（日期和地址——当一个日期或几个部分地址可以发生在一个句子,每个元素之间放置一个逗号和之后的最后一部分。

）
Examples:
Caution: When the date or address has only one element or has its individual parts separated by words in the sentence, do not use a comma within or after the date or address.（警告:当日期和地址只有一个元素或者单词在句子中的各个部分分开,
不要使用逗号或之后日期或地址。

）
Incorrect:
correct:
10. Before Confirmatory Questions - Place a comma between the confirmatory question and the statement that precedes it.（之前确认的问题——一个逗号之间的确认问题,它前面的声明。

）
Example:
（老名字后跟Jr .)博士,医学博士）
（澄清,否则误读词组）。