Common English rhythm, called Running Rhythm above, is measured by feet of either two or three syllables and (putting aside the imperfect feet at the beginning and end of lines and also some unusual measures, in which feet seem to be paired together and double or composite feet to arise) never more or less. Every foot has one principal stress or accent, and this or the syllable it falls on may be called the Stress of the foot and the other part, the one or two unaccented syllables, the Slack.
