Sentence fragments: Fragment sentences are unfinished sentences, i.e. they don't contain a complete idea. A common fragment sentence in student writing is a dependent clause standing alone without an independent clause. In the each of the following examples the fragment is the second 'sentence', shown in red:
Because I didn't study.
Which wasn't a very good idea.
After falling asleep on the sofa.
Slamming the door behind her.
The famous scientist who left Europe to live in the USA.
40 kilometers from my house!