逻辑上的主谓关系与结构上的主谓关系的区别

逻辑上的主谓关系通常是指的分词作状语时，例如
1. The teacher came into the classroom, followed by a student.
The teacher came into the classroom, following the headmaster.
解析：例句一中主语the teacher 和follow 为逻辑上的主谓关系，且为被动，所以用followed.
而例句二中二者为主动关系，所以用following.
句中the teacher 跟come into 为结构上的主谓关系。