历年来，国内外学者对教师指令语的研究主要集中在教师发出有效指令的方法，教师指令的分类与功能等方面。

For a long time the scholars and educators both in China and in western countries have mainly studied types of directives, functions of directives and effects of directives.

youdao

历年来，国内外学者对教师指令语的研究主要集中在教师发出有效指令的方法，教师指令的分类与功能等方面。

For a long time the scholars and educators both in China and in western countries have mainly studied types of directives, functions of directives and effects of directives.

youdao