Constituents that can be substituted for one another without loss of grammaticality belong to the same syntatic category .

可以相互替换而又不改变语法属性的成分属于同一句法类型。

Each experiment consisted of two tasks : one grammaticality judgment task and one story-based translation task .

每一个实验设计皆包括文法测验题与翻译题两种题型。