In this speech, some unusual words such as consecrate, hallow, perish was more than others, some words like "four scores and seven years ago " can be substitute by "eigthy -seven years ago ", at the beginning we may feel it was too complex to use those complicated words, but when we concern about this speech itself, it's suitable to do that, those expression make the speech language more formal and more serious , just the same as the emotional expression in it. And there is an unusual phenomena is the use of personal pronouns, most of the personal pronouns is first person "I", "we", "our", "us", and there is no the second person "you", just used once "they" to represent the people who sacrificed for the county, and the reason why this phenomena occur will be discussed in the third part, the interpersonal function in speeches and