Not just silent adult tears, but really sobbing.

Is this a simple sentence or fragment.

I think it is a fragment, is that correct. But, I am having trouble coming up with why?

3 answers

Fragment, as we don't know who the subject of the sentence is. Who is really sobbing?
How about this one? A little scared, I headed for El Building.

Would it be a fragment or simple sentence?
A simple sentence with an introductory adjective phrase.