Question

Identifying sentences and sentence fragment

Answer 1

I'm assuming you're asking what a sentence and sentence fragment is, a sentence is a proper line of words, involving at least a subject and predicate.

A sentence fragment is an incomplete sentence that doesn't finish what it is completely stating. 
Examples- Uncle John ate. (Ate what?) Until it left. (What left? There is no subject, either.)

Hope it helped, Tiara