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The purpose of this paper is to examine a satisfactory method about English sentence analysis by Chomsky's Standard Theory. Chomsky (1965) tried to analyze English sentences as not a set of words but phrase categories, that is NP, VP etc. For this, I will suggest several revised ph-rules based on Chomsky's theory as followings.

(1) a. S→NP + AUX + V + Sub'
b. NP→(Det) + (Adj) + N + (PP) + (Adjp) + (S')
c. VP→AUX + V + (NP) (NP) (1,3,4형식)
AUX + V + NP + ({NP, Adj}) (5형식)
AUX + Be + ({NP, Adj}) (2형식)
d. AUX→AGR + Tense + (Mod) + (Perf) + (Prog)

With the revised ph-rules I have analyzed English sentence like this: (1) I consider Aux as the sub-category of Verb (2) NP (=subject, object, complement) as not a word category but a phrase category (=(Det) + (Adj) + N + (PP) + (Adjp) + (S')) and then we will find that the concept of extended ph-rules will help us to increase our English sentences analysis ability.