In this paper, we probe into the construction “verb+ho7.1i+complement” in Taiwan’s Southern Min dialect from the perspective of construction gram meaning. The investigated structure, “verb+ho7.1i+complement,” a causative structure, implies particular semantic properties-irrealis. The meaning of the structure is closely related to voice category. Only under the condition of persuasion and command, or the subject has the volition to do something, could the sturctu4re occur. From the view of event structure, the conceptual structure of that construction is CAUSE (EVENT1, EVENT2). The relation between EVENT1, EVENT2 is causative. EVENT1, is the reason causing something to change its state which is denoted by EVENT2. The pronoun i1 does not refer to the third person. In this structure, i1 sometimes refers to the subject (subject-hosted), and sometimes to the object (object-hosted). It depends on which argument undergoes the change of state. As for the mapping form conceptual structure to syntactic expressions, there are some interesting points. First of all, the causal event is denoted by the verb, instead of the verb phrase in this structure. Secondly, the causal event is composed of a monosyllabic verb and a noun in which the noun expresses patient, goal, place or theme. Only a monosyllabic verb can occur in the causative construction. On the other had, if the causal verb consists of a disyllabic verb which is a coordinate construction, then the disyllabic verb should be expressed. Thirdly, the structure with subject-hosted meaning and object-hosted meaning are companied with different syntactic variations respectively. Moreover, this structure in the diachronic development.