Li and Thomson (1976) propose that English is a subject prominent language. In this paper, however, I propose that English makes use of both subject-predicate and topic-comment structures. More precisely, there are three types of clausal structure in English: subject-predicate, topic-comment, and a combination of both. This is on the basis of the syntactic patterns of preposed PPs. In English there are three types of preposed PPs: referential PPs, locational PPs, and directional PPs. This paper shows that Referential PP Inversion is a Subject- Predicate construction, Directional PP Inversion is a Topic-Comment construction, and Locational PP Inversion is a combination of both.

1. Introduction
 2. Structures of the Three Types of Preposed PP
  2.1. Referential PPs and Null D
  2.2. Locative PPs and Movement Paradoxes
  2.3. Directional PPs and Two Types of EPP
 3. Account
 4. The Rigidity of the Topic-Comment Structure
  4.1. No Aux Constraint
  4.2. The Freezing Effect
 5. Summary and Conclusion
 References

• Kwang-sup Kim(Hankuk University of Foreign Studies)