In this dissertation I investigate the Mandarin "you"-existential sentence. My focus is on its syntax. I also discuss in less detail some semantic peculiarity of the "you"-existential. I begin my investigation of the syntax of "you"-existentials by first looking into what they are not. To this end, I present five different analyses and I show how each of them ultimately falls short. I first review three analyses from previous research. Next I discuss two additional analyses which are not from previous research but are serious potential competitors of the analysis that I eventually will pursue. One of the two, which I will name the "you-determiner analysis," is a result of an ongoing change where the existential verb "you" is reanalyzed as a determiner, and reflects an alternative non-existential reading of the "you"-sentence. Having shown what "you"-existentials are not, I proceed to show what they are. I build up a syntax by piecing together my findings regarding several syntactic properties of the "you"-existential, including the size of the existential coda, the relation between the coda and the rest of the sentence, the (non-)optionality of the coda, and evidence for or against movement. I argue that there are two sub-types within "you"-existentials--"subject existentials" and "object existentials"--as the syntactic mechanism involved in deriving an existential in which the referent of the pivot serves as the subject of the coda (or within the subject of the coda) is different from when the referent of the pivot is the object of the coda. The former is control; the latter is null-operator movement. After discussion on the syntax of the "you"-existential, I change gear and direct my attention to the syntax-semantics interface. Specifically, I observe that "you"-existentials are completely oblivious to the predicate restriction. I suggest that the "you"-existential's immunity to the predicate restriction is a natural result of its syntax--finite clause codas impose no restrictions on what types of predicates are allowed. I also discuss how we can extend this idea to English. I observe that the predicate restriction is not limited to English existential sentences, but found in small clauses in general. The small size of such phrases precludes a position for the subject of individual-level predicates, which is generated in [Spec, PrP]. The subject of stage-level predicates, on the other hand, is generated at a lower position; these predicates are therefore not excluded from small clauses. To summarize, the main proposals I will make in this dissertation include the following: 1. There is a change in progress where the existential verb "you" is reanalyzed as a determiner. This means that for many "you"-existentials, two syntactic structures are simultaneously present, one of which is the existential structure. (Chapter 2). 2. Subject "you"-existentials involve control; object "you"-existentials are derived via null-operator movement in the coda. Thus, subject existentials are essentially on par with subject control sentences and object existentials are on par with "tough"-movement sentences. (Chapter 3). 3. The predication restriction is a natural result of the syntax. Mandarin existential codas are full finite clauses; therefore all types of predicates are allowed. English existential codas are small clauses, which leave no position for the subject of individual-level predicates. (Chapter 4). [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]