According to Longman Grammar of Spoken and Written English, one of the samples of English
conversation corpus consists of lexical words （４１%） , function words （４４%） , and inserts （１０%） , and
considering the total number of each word category, function words and inserts play a very significant
role in conversation.　This paper, therefore, will deal with some function words and conversational
functions, focusing on wh-words, existential there and some similar words, especially those with
the language label spoken, one of the register labels in Longman Dictionary of Contemporary English.
　Analyzing these function words in LDOCE, we find that they have interactive functions in conversation
such as drawing attention, expressing diverse emotions, and introducing main utterances.
Conversation participants, using such function words and inserts, make their utterances more interpersonal
and interactive than the counterparts in written English.