Subject of a Dependent Clause

The subject of a dependent clause is usually a noun or gerund phrase that is not the main subject of the sentence; rather, it occupies the subject's position in the dependent clause.

Noun

Since the man became an insect, he has noticed that there is a wealth of food on kitchen floors all across America.

Gerund phrase

The nun gave up knitting her habits because starching the wool was becoming a very arduous process.