protasis

1.As to dynamic modality, it can always be hypothesized in a conditional protasis, is always subject to tense distinction, and does not shift its orientation under the influence of interrogation.

时态的影响；不会因为疑问而转移方向，指向者。从功能讲，机能情态不表达说者对语内容的任何态度，而本身语命题内容。