日语学习者在日译中时,常常会因不清楚中顿从句是否受主句情态的支配而导致误译。因此弄清中顿从句的情态表达以及主从句之间情态的支配关系至关重要。本文通过对实际用例的考察发现一部分情态词语可以出现在从句中,与主句构成推论因果复旬,而复句中主句的情态可以支配大部分中顿从句,但不能支配推论因果从句。 When Japanese learners translate Japanese, they often misinterpret it because they do not know whether or not the Nepali clause is dominated by the dominant sentence. Therefore, it is very important to understand the modality expression of Neuton clause and the dictation of modality between the main clauses. In this paper, we find that some of the modal words can appear in clauses and constitute the corollary of the corollary to the main clause, while the modality of the main clause in the complex sentences can dominate most of the Midcourse clauses but can not dominate the causal clauses.