The three basic categories of speech disorders are articulation disorders, fluency disorders, and voice disorders. An example of an articulation disorder is a distortion, where a sound is said inaccurately but resembles the intended sound, such as a lisp. An example of a fluency disorder is stuttering, where the student repeats words. Lastly, an example of a voice disorder is phonation, including speech factors of pitch, loudness, and quality, such as voice hoarseness/strain. n order to "know" a language, one must be able to apply the basic units and complex rules of governing relationships among sounds, words, sentences, meaning, and the use of language. Language contains five major interrelated yet distinct elements - phonology, morphology, syntax, semantics, and pragmatics. Phonology is the sound system of a language that includes using sounds to create meaningful syllables. Morphology dictates how the smallest meaningful units of our language are combined to form words (combining sounds to generate words). Syntax is a series of linguistic rules that determine word order and combinations to form sentences and how such word order is used in communication. Semantics is a system that involves word meanings and word relationships. Finally, pragmatics is the effectiveness of language in achieving desired functions in social situations.