这三种语法理论，各有优劣。
These three major grammar theories have their own strong points and weaknesses.
话语标记的研究是语法理论课题中的一个重要部分。
Research on discourse markers is important for the theory of grammaticalization.
本文运用韩礼德的功能语法理论对交互式英语广告语言的人际功能进行了研究。
This paper focuses on the interpersonal function of the language in interactive English ads.
本文运用韩礼德的功能语法理论对交互式英语广告语言的人际功能进行了研究。
This paper focuses on the interpersonal function of the language in interactive English ads.
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