This thesis examines the nature of aspect and evidentials in Lahu Shi, a member of
the Tibeto-Burman subfamily of the Sino-Tibetan family of languages. According to
traditional grammar, aspect is a grammatical category which deals with how the event
is viewed such as whether it is progressive, perfective, completive etc. As for
evidentials, they are obligatory elements which have a source of information as its
primary meaning. Are these grammatical elements themselves merely grammatical
devices or do they also have inherent conceptual content which is significant to their
meaning and grammatical behavior?