1、In English, there exist some structures which share the common feature that thephrase denoting the object of action are positioned to the leftmost end of the wholesentences instead of followinoa the corresponding verbs i

2、n their normal sequence. Theirspecial structures result in some pragmatic effects in the communication, which enablesreaders or listeners to spot out the topic for attention more conveniently.This thesis is attempted at

3、making a thorough analysis on those similar sentencepatterns to illustrate their underlying structures and to explore the involvedtransformational process. With the interpretation of IP/CP in generative grammar, itencomp

4、asses passivization, object-to-subJect raising, wh-question with patient noun wh-phrase, topicalization and left dislocation. The discussion begins with the detailedcategorization of the moved constituent to investigate

5、its internal construction. In order totestify the transformational process, the existence of the trace is proved from syntactic,morphological, phonological and semantic perspectives. The whole analysis is roundedup with

6、the SPEC-to-SPEC movement proposed on the basis of the COMP-to-COMPmovement in the previous studies on wh-question. It helps to solve the knotty problemsin the case of passivization, object-to-subject, topicalization and