Abstract: A“location + v + patient”←→B“patient + v + location” is one semantic sub-category of the reversible sentences concerning providing and availability. To fulfill the syntactic inversion， the location must have the semantic meaning of the displaced end， and it is also required that it can become the provided thing; furthermore， the verb must have the semantic meaning of adherence. In addition， when it is added the aspectual auxiliary word，“location + v + zhe /le + patient”can be regarded as not only the providing sentence， but also the existential sentence.