This document discusses prepositions and conjunctions in Mandarin Chinese. It provides examples of the most common prepositions used to indicate location, direction of action, joint performance of action, and transfer of something. Prepositions in Chinese always follow the object noun and verb. The document also lists some common conjunctions used to connect words, phrases, or sentences, including additive conjunctions like "he" (and) and contrast conjunctions like "keshì" (but).