the minor (functional) categories include AUX (verbs) and particles, conjunctions, and clitics, which are all part of the category Particles. The general Warlpiri sentence phrase structure is as follows: S --> (AUX) α α* (with α = N, V, or particle) Pronominals are freely ordered with respect to the other words in the sentence, and behave as other nominals do. This is in contrast to the sentence structure of a configurational language, such as English, with a basic sentence phrase structure following: S --> NP VP. Warlpiri verbs are always argument-taking predicates and Warlpiri nominals are always arguments or argument-taking predicates. This is shown in the tree structure to the right of ngaju-rna mijipurru ("I am short") in Warlpiri, with the nominals ngaju ("I") and mijipurru ("short") acting as either an argument-taking predicate or argument, depending on the category of the AUX -rna ("am"). In this sentence, the AUX is first person singular, indicating that ngaju must act as an argument and that mijipurru must act as an argument-taking predicate in order for the sentence to be grammatical in Warlpiri. In English, the DP "I" is the argument and the adjective "short" is the argument-taking predicate. The trees to the right show the differences between configurational and non-configurational languages, with an example tree from Warlpiri compared with an example tree from English. Case-based analysis: Jelinek Hale (1980, 1981, 1982, 1983) aimed to define a configurationality parameter from which the clusters of properties in non-configurational languages would follow. Eloise Jelinek challenges Hale, providing a re-analysis of Walpiri and certain other non-configurational languages, proposes a different parameter. Mainly Jelinek provides an analysis for why nominals are frequently 'absent' in Warlpiri (null anaphora). Following the Government Binding Theory, the projection principle prevents missing nominals, instead there are empty heads that bear relevant thematic roles, in other words the nominal is recoverable. Hale stipulates that nominals in non-configurational languages are simply optional, which is a result of the nature of the relationship between phrase structure and lexical structure in non-configurational languages. However Jelinek proposes configurationally parameters that are in agreement with the projection principle, with specific reference to Warlpiri data. It is proposed that the AUX not only marks grammatical relations but it also a constituent containing case marked fully referential clitic pronouns that serve as verbal arguments. Since nominals are never verb arguments they can be omitted, without violating the projection principle. Subsequently,