选修课
Subject: This is a free elective course.
情景对话：
A: Excuse me, where is the classroom?
打搅一下，请问教室在哪里？
B: Mmm... you can follow me. By the way, this is afree elective course.
恩......你可以跟着我走。顺便说一下，这是一门选修课。
地道表达
a free elective course
1. 解词释义
Free elective course的表面意思是“自由选择的课程”，必修课就是“required course”。还有哦一种课程叫做“option course”，这种课程相当于课外活动，学到一门学问，舞蹈或音乐的课程。
2. 拓展例句
e.g. In college, English is a required course and psychology is an elective course.
在大学里，英语是必修课而心理学是选修课。
e.g. Most of the students of our class take Japanese as an elective course.
我们班大部分同学选修日语。
Ps：跟着某人走到某处，可以这样说：“Follow me.”
Ps ：by the way是“顺便说一下”的意思。例如：
By the way, do you have any idea where the post office is?
顺便问一下,你知道邮局在哪儿吗?
By the way, what are you going to do on Christmas?
顺便问一下，圣诞节你打算做什么？
