The document discusses intonation in language and its importance for communication. It defines key terms like tone, pitch, tone languages, stress. Tone units have components like the tonic syllable, head, pre-head and tail. English is not a tonal language but uses intonation patterns like falling, rising, falling-rising tones to convey meanings and attitudes. Analyzing intonation patterns is important for learning a new language though rules alone cannot replace learning from native speakers.