标点符号可以使语意更精炼明确，而要使写作的理路清晰丶有组织，标点符号扮演很重要的角色。
下面这个段落完全不加标点符号，试着读读看，很快您就会领悟到标点符号的重要：
perhaps you dont always need to use commas periods colons etc to make sentences clear when i am in a hurry tired cold lazy or angry i sometimes leave out punctuation marks grammar is stupid i can write without it and dont need it my uncle Harry once said he was not very clever and i never understood a word he wrote to me i think ill learn some punctuation not too much enough to write to Uncle Harry he needs some help
现在加了标点符号，看看有什麽不同！
Perhaps you don't always need to use commas, periods, colons etc. to make sentences clear. When I am in a hurry, tired, cold, lazy, or angry I sometimes leave out punctuation marks. "Grammar is stupid! I can write without it and don't need it," my uncle Harry once said. He was not very clever, and I never understood a word he wrote to me. I think I'll learn some punctuation - not too much, enough to write to Uncle Harry. He needs some help!
以下几个页面的内容，会教您如何让写出来的句子更清楚丶有条理。
英语中的标点符号用法