In the Mengjin dialect, the imperative sentence “Vp+ʦau (‘go’)” is a common sentence pattern, which has six major structural forms. The basic structure is “tɕhy412(‘go’)+(Np)+Vp+ʦau (‘go’)”, and “ʦau” in this form is a marginalized directional verb. Containing the stronger power factor, the imperative sentence “Vp+ʦau” is often used in the relationship between the superior and the subordinate, which has a high degree of colloquialism. Nevertheless, the power factor can be ignored on condition that the relationship between the two parties of the communication is very close. Due to the division of the ancient Chinese political jurisdictions and the influence of population migration, the imperative “Vp+ʦau” is widely distributed. Two different imperative sentences being merged and weakened, this sentence pattern comes into being.