周一下午的课英语为"Monday afternoon class".
来源：Monday 是英语中星期一的意思，afternoon 是英语中下午的意思，class 是英语中课的意思。
例句1:
"I have a Monday afternoon class at 2pm."
翻译："我周一下午2点有一节课。"
例句2:
"Monday afternoon classes are always a drag for me."
翻译："对于我来说，周一下午的课总是很累人。"
例句3:
"I always look forward to my Monday afternoon class because it's my favorite subject."
翻译: "我总是期待我周一下午的课,因为那是我最喜欢的科目"