Symbols that cause syntactic errors for single use and require an escape character to change semantics.

单个使用会导致语法错误而需要通过转义字符来修改语义的符号。

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Because the needs of expression, Syntax Part can move it's static position. It can not change syntactic construction and semantic structure. It only can change pragmatic function.

在句子的语用平面上，由于表达的需要，句法成分可以移动其静态位置，移位不改变句法结构关系和语义结构关系，只改变语用功能。

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They form a grammaticalization sequence and the action weakens gradually. And the semantic change is closely related to the syntactic context of pivotal construction.

这三种意义形成一个意义逐渐虚化、动作义不断减弱的序列，这种语义变化与其处于兼语式的句法环境密切相关。

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