This section of an online grammar guide from the University of Calgary provides a review of and an interactive exercise on identifying how clauses function in sentences (as nouns, adjectives, or adverbs).

A large collection of concise explanations of various aspects of English grammar and usage. All topics include exercises that can be done, checked, and corrected online. Solid resource for English language learners at the intermediate...

Reflexive pronouns reflect the subject of the sentence. A reflexive pronoun is a pronoun that is preceded or followed by the noun, adjective, adverb, or pronoun to which it refers within the same clause. [0:35]