The form and motivation of the "值得" structure in representing the passive concept compared against other structures;

Yonglai(用来) is a potential passive sign(PPS), so there is passive concept in Yonglai(用来)construction.

The first part deals with the condition of forming a passive concept from the perspectives of object emergence and deduction of cause and effect; in this part, the author argues that the concept of passivity is an pervasive one; The second part analyzes the choice and use of the passive concept from the views of event estimation and sentence form.

This paper discusses that two Chinese ways of expressing passive meaning——the ideational passives without marked words and the passives with marked words exemplify the principle of quantitative iconicity,and the former express the conventional high-predicted information in simple forms,while the latter express the unconventional low-predicted information in complex forms.