Word form, word class and the grammatical position of words in a sentence are closely related. Words cannot be chosen freely to fill in a grammatical position of a sentence.
词形、词性和词的语法位置之间有密切联系，不能选用任意词性的词来填充某一语法位置。
Grammatical features in the same word class suggest two related sequences: syntactic and semantic structures.
词类的语法特征隐含两种相关序列：句法结构与语义结构。
There was no significant difference between the function and content words, which suggested that the word representation was not solely decided by the grammatical class;
功能词和内容词无显著差异，提示单纯从语法角度考虑词汇表征是不合适的；
They are of similar word class and grammatical form. But their non-interrogative usages differ because of syntactic constraints.
而非疑问用法由于受到不同的句式制约，产生了不同的表达方式。
They are of similar word class and grammatical form. But their non-interrogative usages differ because of syntactic constraints.
而非疑问用法由于受到不同的句式制约，产生了不同的表达方式。
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