根据给定的文章，编辑掉其中的语法错误。
文章内容见下：
      It's important to have a good vocabulary if you want too communicate effectively. When your writing is riddled with spelling and grammar mistakes, your reader's will have difficulty understanding your meaning.
It's important to have a good vocabulary if you want to communicate effectively. When your writing is riddled with spelling and grammar mistakes, your readers will have difficulty understanding your meaning.