“既然”句和“因为”句主观性的差异主要表现在,前者表交互主观性,后者不一定表交互主观性。“既然”句有预设结构,说话者将其原因小句看成听说双方共知的命题;作为一种演绎推理过程,其大前提一般符合常理或逻辑,因而其结论一般也是听说双方共同接受的,像英语“since”小句一样具有人际主观性。 “Since ” sentence and “Because ” sentence subjectivity difference is mainly manifested in the former table interactive subjectivity, the latter is not necessarily the table subjectivity. “Since ” has a presupposed structure, the speaker regards the clause of his reason as a proposition that hears both parties’ common knowledge. As a kind of deductive reasoning process, the general premise of the deduction is generally consistent with common sense or logic, and thus the conclusion is generally heard It is said that both parties accept the same subjectiveness as the English “since” clauses.