Under the perspective of the "functional sentence patterns", this research deeply analyzes the syntactic, semantic, pragmatic and generating mechanism of the functional sentence pattern composed of the phrase "Ni Haibieshuo", and summarizes the counter-expectation function of it, which can form two counter-expectation functional sentences marked by the non-self-contained phrase "Ni Haibieshuo" and the self-contained phrase ""Ni Haibieshuo". Based on this, it further reveals the unique explanatory ability and generating role of functional sentence patterns theory in TCSL.