介词框架“当X时”常常作为状语与后续Y句构成一个蕴含时间或条件关系的单句,但由于具体语境千差万别,“当X时”与Y之间的关系除了可往下细分外,还跨越了原来的语义类。前附于“当”的特定形式词可将不同的语义类区分并凸显出来,从而与Y构成多种语义格局。言者的主观视点在语义格局的最终成型中起主导作用。 The prepositional frame “when X ” is often used as an adverbial clause with the following Y sentence to form a single sentence containing time or condition, but because of the different contexts, “when X ” and the relationship between Y Segments, but also beyond the original semantic categories. Specific formal terms that are prepended to “when ” distinguish and highlight different semantic classes and thus form a variety of semantic patterns with Y. The speaker’s subjective viewpoint plays a leading role in the final formation of the semantic structure.