The document discusses several key concepts in Chomsky's Principles and Parameters theory of grammar:
- Language knowledge consists of universal principles and parameters that vary across languages. Parameters specify word order and position of elements in phrases.
- Phrases have a hierarchical tree structure and are headed by certain elements like verbs or nouns. The position of heads relative to complements is specified by the Head Parameter.
- Binding theory addresses the relationship between referring expressions like pronouns and their antecedents within sentences. It defines classes of words and constraints on their reference.