Selective question sentence is a special marked sentence pattern, which has unique social and cognitive functions in the daily conversation and writing expression.

选择疑问句是一种较特殊的标记性句式，在日常交际和书面表达中具有特定的社会和认知功能。

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For formal use, the variable can be marked with a "#" symbol -- or "#1", "#2", and so forth -- if multiple variables exist in one sentence.

对于正式的使用，如果一个句子中存在多个变量，则变量可以用“#”符号（或“#1”和“#2”等）作为标记。

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If the subject is marked as a subject with an ending, it need not come at the beginning of a sentence.

如果主语词尾有主语标记，那么主语就不必须出现在句首。

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