The formation and structure of subordinate clauses is a field of study that has frequently claimed the attention of linguists. One area of particular interest concerns the syntax of what are referred to in traditional grammars as 'noun clauses' or in a more modern terminology as 'complement clauses'. Noun or complement clauses may follow a wide range of main-clause expressions. They may be governed by finite verbal phrases, may stand in apposition to nouns or pronouns or may otherwise be dependent on adjectival or adverbial expressions. An alternative designation for these structures derives from conjunctions that are sometimes used to introduce them; hence the term 'that-clause' has a certain currency in English, while the same can be said of German 'daBSatz', Swedish 'att-sats' etc.