All sentences have at least one noun and one verb. A noun is a person, a place, or a thing. Some examples of nouns are sister (person), home (place), plate (thing). A verb is an action like run, jump, talk, sing. Some example sentences: My sister. Subjects and Verbs. A sentence is commonly defined as 'a complete unit of thought.' These OWL resources offer information and exercises on how to clarify sentences and specifically discuss sentence clauses, sentence fragments, sentence structure, and subject-verb agreement. Please use the navigation bar on the left or the links below to access the individual exercises. Whether you’re engaging in everyday speech or writing the perfect paper, you need to be familiar with the various parts of English grammar. Knowing how to correctly use nouns, verbs, adjectives, pronouns, prepositions, and punctuation as well as how to properly structure a sentence can make or break a good grade or a professional presentation.