Acquiring English Preposition “out” via Image Schema

Image schema plays an important role in the acquisition of English preposition,for most of them derive from spatial conceptions,which represent how the first step that people have the basic knowledge of the world.Out schema is one of the basic schemas inContainer schema,which belongs to the spatial motion group.The word out as well as other prepositions has a great number of extensions in meaning deriving from metaphorical mapping.