Here is the fragment again:

And grabbed the last glazed doughnut while Frederick was pouring her a cup of coffee.

You correctly identified the fragment as a lonely verb phrase. Grabbed, the verb which is missing a subject, is the clue.

To fix this fragment, you could add a subject, like this:

And Laurie grabbed the last glazed doughnut while Frederick was pouring her a cup of coffee.

Or you could use Punctuation Rule 8:

Main Clause + Ø + Lonely Verb.

The correction would look like this:

Laurie complained about her caffeine headache and grabbed the last glazed doughnut while Frederick was pouring her a cup of coffee.

Enjoy having your own personal knight!

Go to the next fragment.

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