“…With this lexically vague concept while is very untypical of the grammatical category of nouns as content bearers within our cline of grammatical categories. Yet, grammatically the noun while has the autonomous qualities of nouns (Zelinsky-Wibbelt, 1988;Zelinsky-Wibbelt, 1992). It constrains the relational meanings of verbs, it can be determined and modified, and it can have co-referential functions, as it has in ( 9) (Hopper and Traugott, 1993, 104):…”