He became involved in student politics whilst studying at Nottingham University.
后面的study为什么用ing形式是不是省略了什么?
He became involved in student politics whilst studying at Nottingham University.
句中的 whilst 是连词,用法与 while 相同。原句相当于:
He became involved in student politics while studying at Nottingham University.
= He became involved in student politics while (he was) studying at Nottingham University.