As a result of uncleared instructions, I had been lagging behind the class.

I had been swimming in the confused data.

I had been doing literature search much before he asked us to do.

I had been working on research ideas much before semester started.

Since I had difficulty in following instructor’s little confused instructions in 2011, I had been regretting my decision of choosing the college  all semester when we were assigned the same instructor for the  important course.

Had it not been snowing that day?