a varity of job responsibilities and service standards of the hotel I had learned during the period

问题描述:

a varity of job responsibilities and service standards of the hotel I had learned during the period
这是一个完整的句子吗?我总觉得应该吧前面的内容放在had 后面,但是同时说这是对的,是宾语前置.

during the period
I had learned a varity of job responsibilities and service standards of the hotel