course
1.in due course（在今后适当的时候）里没有the。
2.in the course of...（在…的过程中）是状语短语。例如：Three delegations arrived in the course of the day. in course of...（正在…中）是形容词短语。例如：The house is in course of erection. in (the) course of time（到了相当时期地）里的the可有可无。
3.说“从（某教授）学习某课程”在美国大学里有下面各种说法：take a course under Professor...，take a course from Professor...，take a course with Professor...，和take a course to Professor...。用to最不普通。
4.在口语里有时用course代替of course。
