Peter Uhrig 
Subjects in English [PDF ebook] 
From Valency Grammar to a Constructionist Treatment of Non-Canonical Subjects

The purpose of the book is twofold. First it tries to give a descriptive account of subjects in English. The second aim is to elucidate the status of the subject both as a concept in grammatical theory and with regard to the question whether the subject is determined by item-specific arbitrary formal restrictions in the same way as postverbal complements of the verb have been shown to be.