a number of 表示很多,大量,后跟可数名词的复数形式,be动词也用复数形式.用法与many相似. 例如:There are a large number of new books in our school library this term. 这学期我们学校图书馆有许多新书. A number of students are standing outside the office waiting for their turn to recite the text. 许多学生站在老师办公室外按顺序等候背书.
