the teacher asked the students a very unusual question

ask和forgive都是可以接双宾语的及物动词'

ask someone something
让某人做某事
forgive someone (for doing) something
原谅某人（做）某事

your offence
a very unusual question
这两个才是间接宾语.
你把那个看成直接宾语了?
一般接动词后面的都是直接宾语吧- -?

问学生
原谅你

中文一出来就很明确了

问什么和原谅什么才是间接宾语