You's Grammatical Meaning and Its Emergence

In a subjectless sentence,you("have")is a marker of an indefinite topic.The use has come into being through its grammaticalization from the you in existent sentences.The process is realized in two ways.First,you's existential meaning was gradually bleached for the change of its syntactic environment and,second,you incorporated the indefinite meaning through its long-lasting co-occurrence with noun phrases that express indefinite numerical meanings.In a subjectless sentence,you's indefinite meaning was always made prominent and thus it gradually turned into a grammatical marker.