To find the rule of the appearance and disappearance of " 之 " in the structure consisting of a central word and its modifier throughthe syntactical functions of the modifier, with the language material from " Mencius" as its background;

This thesis tries to find the rule of the appearance and disappearance of "之" in the structure consisting of a central word and its modifier through the influence of the amount of syllables, with the language material from ″Mencius″ as its background.

In the article systematically described structural forms firstly, then chiefly explained the appearance of single M_状 that place in the middle 、 beginning 、 end of sentence , explained the appearance of various words and phrases behind the"De" in sentence that M_状 is place in the middle of the sentence, classified three.

The paper aims at discussing the influence of the appearance discipline of the BEI sentence and whether it\'s been applied or not on the whole sentence.