This document discusses syntactic relations and tree diagrams. It defines syntactic relations as functional relationships between constituents in clauses or phrases. A tree diagram provides a visual representation of constituents in an expression, resembling a family tree. Key terms for tree diagrams are discussed, including constituents, nodes, branches, and labeling. Constituent command, or c-command, is defined as a constituent commanding its sister and any constituent contained within its sister. C-command is important for describing anaphors like reflexives and reciprocals, which must be bound within their governing category.