Intonations refer to the pitch differences that extend over phonetic units larger than the syllable. By means of intonation, syllables are grouped into phrases, and phrases into sentences. In English a phrase usually has one or two different terminations. The most common phrasal intonation ends on a falling pitch; the other ends on a more or less level pitch.
Intonation and Tone
Tone refers to pitch variations. In some languages, the same sequence of segments may have different meanings if uttered at different relative pitches. The function of tone is quite different from that of stress. Tones do not mark the beginning and ending of words, nor do they even indicate to the speaker how many words there are in an utterance.
