二语写作的语篇意义构建、语篇意义功能、写作复杂性、中介语发展、学术写作等研究维度都有语法隐喻的贡献。语法隐喻以意义为核心，关联语境层和词汇语法层，是系统功能语言学就书面语篇意义构建提供的符号资源；是实现抽象概括、衔接连贯等语篇功能的资源；是复杂性语义生成、以及满足高级语篇写作交际复杂性需求的资源；中介语发展和学术写作也以其为语法资源。语法隐喻框架下二语写作研究本质是以语言意义为核心，故写作教学应该以“意义写作”为本，运用语法隐喻资源，构建具有语境契合度的语篇意义。

In L2 writing, grammatical metaphor (GM) serves as a resource in such research dimensions as discourse-semantic construction, discourse-semantic functions，linguistic complexity, interlanguage development and academic writing. With meaning as the core to bind context and lexico-grammar, GM is a semiotic resource provided by systemic functional linguistics for semantic construction in written discourse. It demonstrates discourse-semantic functions of coherence, abstraction, and micro-semantic functions. Its properties, such as semantic complexity and fitting itself for the need of communicational complexity of high-level discourse writing, reveal itself as a resource to bind discourse-semantic construction of specific contextual types and language complexity. Interlanguage and academic writing also develop with GM as resource. Studies in L2 writing under the framework of GM are essentially meaning-centered; therefore, writing pedagogically should be based on discourse-semantic construction, i.e. write for meaning fitting into the context of particular types of writing task, by using the resource of GM.