In this Pitch, we will introduce you the basic concepts of cognitive linguistics and enhance the awareness of the research of theoretical linguistics among the students and faculties in SFC. In SFC, many opportunities to learn English and use English exist. However, the basis are founded by theoretical studies conducted in SFC including the researches of cognitive linguistics. In this Pitch, We will introduce you the researches of cognitive linguistics, especially the studies of polysemy, which is getting attention in the field of cognitive linguistics. These studies are basis of SFC English researches and play a vital role in SFC English.