A phrase that consists of a preposition and its object and has adjectival or adverbial value, such asin the house in the people in the house or by him in The book was written by him.介词短语:由介词及其宾语构成的短语,可作形容词或副词用,例如the people in the house(房中的人) 中的 in the house 或 The book was written by him(这本书是由他写的) 中的 by him