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This paper sets out by examining Hale and Keyser's claim that there are no thematic roles but simply relations determined by categorial and their projections, which is called LRS. Based on X-bar syntax, we get a typical causal relations by composing two VPs whose head Vs denote events. We have seen that denominals verbs are morphologically derived from the corresponding noun and that the two types of denominal verbs--location and locatum--differ in the semantic relation of location they express. We also review that verbs' argument structure can be analyzed in terms of the principles of Unambiguous Projection and Full Interpretation in addition to the structural properties of the lexical heads. The difference between unergatives and unaccusatives is analyzed with regard to the structural position of the subject. A question arises regarding whether l-syntax is distinct from s-syntax. The difference in behaviour of unergaive and urgative verbs is taken into consideration with regard to the structural position of the relevant NP at l-syntax. We see that the notion of derivational phase can be invoked in the sense that LRS derivations are involved in strict local movement from one lexical head to another inside a projection. We find a problem that the locality constraint is violated in triggering movement and attracting a DP.