This is the most comprehensive, integrated explanation ever published of the properties of question formations and their variations across languages. Movement in Language develops a new set of arguments for the controversial claim that syntax should be understood derivationally; that is, that the best model of language is one in which sentences are constructed in a series of operations that precede or follow each other in time. The arguments are exemplified through reference to a number of languages, including Bulgarian, Japanese, English, Chinese, and Serbo-Croatian.