... part in: to be involved in, to participate in (also: to be in on) o Martin was sick and could not take part in the meeting yesterday. o I didn't want to be in on their argument, so I remained ... expected, new idioms have been included and outdated idioms have been removed. Lessons in all sections review and build upon idioms introduced in earlier lessons. In some cases, notes that explain special ... in the English language. In fact, the use of idioms is so widespread that an understanding of these expressions is essential to successful communication, whether in listening, speaking, reading,...