“是……的”格式的句子,是判断句还是动作(行为)句、形容句,这是需要认真辨析的。要弄清“是……的”在句法结构中的作用,关键在于未尾那个“的”在什么情况下是结构助词,什么情况下是语气助词(也叫“语气词”)。如果是结构助词,则属于判断句;如果是语气助词,则是动作(行为)句或形容句。 The sentences of “yes ...” format are sentences or actions of sentence or action, which is a sentence that needs careful analysis. To clarify the role of “is ...” in the syntactic structure, the key lies in the circumstances under which the “underhood” is a structural particle, and in which case a modal particle (also called a “modal particle”). If it is a structural particle, it belongs to the judgment sentence; if it is a modal particle, it is an action (behavior) sentence or a descriptive sentence.