尊敬的王先生：衷心感谢您对《系统功能语法概论》一书的关心和爱护。文中提到的问题值得我们几位作者深思。现就其中一些问题提出自己的看法，很可能不正确。一、物质过程和行为过程的区别。首先，我认为，所有的行为过程都可以看做是物质过程。韩礼德之所以将行为过程单独列 Dear Mr. Wang: Thank you very much for your concern and love for the book An Introduction to Systemic Functional Grammar. The issues mentioned in the article deserve our consideration by several authors. It is quite possible that my views on some of these issues are incorrect. First, the difference between material and behavioral processes. First of all, I think all the behavioral processes can be regarded as material processes. The reason why Halliday separate the course of conduct