Must You Always Write in Complete Sentences?

No way! However, complete sentences offer real value. To be complete, a sentence must have a noun, a verb, and punctuation. I write. Sally sits. Bobby bounces. Should you choose to deviate from this path of noun-verb-punctuation, do so only as a master of grammar. As William Strunk, the writing style guru, put it, "Unless he is certain of doing well, [the writer] will probably do best to follow the rules." And as Stephen King in On Writing replied, "If you don't have a rudimentary grasp of how the parts of speech translate into coherent sentences, how can you be certain you are doing well?" Language is wonderfully flexible. An incomplete sentence can be as powerful as a complete one, but know that you have to master the rules first before you break them.

Caveat: Of almost equal importance is the medium. There are many mediums—technical reports are one—where complete sentences are not only the norm but are also best suited to the material and the audience. But that's a discussion for another day.

Read more on a similar topic from one of my earlier blog posts: Writing with Style: Rules vs. Folklore.