Although punctual himself, the professor was quite used to students' being late for his lecture.

Although punctual himself=Although he was punctual himselfbe late for his lecture(上他的课迟到）be late for固定搭配的.……迟到……译文：尽管教授自己很准时,他却相当习惯了学生们上他的课迟到.be used to习...但：be late for是 因...迟到Although punctual himself=Although he was punctual himself，这种缩写，语法上叫什么himself在句中是什么成份be late for class不是“因上课而迟到”的意思吧？I am sorry for being late for your class.Although punctual himself=Although he was punctual himself这是状语从句的省略。如：When in Beijing(When we were in Beijing), we were in the Great Wall to enjoy ourselves.状语从句省略有什么规律？主语谓语与主句主语谓语一致时，经常可以这样省略的。