RACHVIK wrote:Fred lost his wallet while driving to a holiday dinner.
The above sentence has two clauses:
Fred lost his wallet - An independent clause
Fred - Subject
lost - verb
while driving to a holiday dinner - Dependent adverbial clause modifying verb 'lost'
the above does not have a verb. verb-ing here acts as a subject.
This is a fragment missing a SV pair.
I hope that clarifies.
Thanks
An adverbial modifying phrase does not require a verb. Notice that this sentence would also be correct if we rearranged it to put the adverbial modifier at the start:
While driving to a holiday dinner, Fred lost his wallet.
I would argue, however, that this version would be preferred because it clearly indicates the person doing the action (it was Fred driving to the holiday dinner so the modification is obvious).

Whit
Whitney Garner
GMAT/GRE/EA Instructor & Anxiety/Accommodations Coach
www.whitneygarner.com
Contributor to Beat The GMAT!
Math is a lot like love - a simple idea that can easily get complicated
