逗号是英语写作中最常见的标点符号，但是正确使用不容易，它会影响表达和理解。下面我们来谈谈逗号的几种正确使用方法。 1. 它可以分开一系列并列词或短语。比如分开一系列并列副词：Slowly, slyly, and cautiously, Eric slid the wallet across the table. 分开一系列并列动名词短语：My favorite uses of the Internet are sending e-mail, surfing the Web, and using chat rooms . 2. 它可以分开两个由并列连词(and, but, or, nor, for, yet, so) 连结的独立句。比如，The public seems eager for some kind of gun control legislation, but the congress is obviously too timid to enact any truly effective measures. 3. 它可以把引导短语与主句分开：比如，Anxious about the upcoming winter, settlers began to bicker among themselves about supplies. 4. 当从句在主句之前起到引导整个句子的作用，就用逗号把从句与主句分开：比如，When conditions are right, that horse can run just like its father. 又比如， I believe that should the eggs break, we will have a mess. 5. 逗号把市，州与国家分开，月日与年分开： 比如，Their wedding date was set for August 5, 2000 in the college chapel in Newton, Massachusetts,USA. 6. 逗号可以把插入语与句子其它部分分开：比如，Song of Solomon, I believe, is the professor’s favorite. 7. 逗号可以把同位语短语与句子其它部分分开：比如，Let Warren and Andrea, our most skillful speakers, present our proposal. 8. 逗号可以把非限定性定语从句与主句分开：比如，That singer, whoever he is, really knows how to sing the blues. 9. 逗号可以在引号之内，也可以在引号之外。当引号 引述的原话被插入语分开，逗号必须在引号内。比如，“We can’t see into the future,” said the President, “but we have to prepare for it nonetheless.” 当引号引的是标题时，逗号必须在引号之外。比如，During high school, he read “Romeo and Juliet”, “Julius Caesar”, and ”Hamlet“. 10. 转换词（Transition Words) 放在句子的开头，要用逗号与句子分开：比如，Frankly, it doesn’t seem to matter.