Expression means the words you choose and the way you assemble them into sentences. This is what many people think of first when it comes to Plain Language.
You may have an impressive vocabulary and you may have spent years familiarizing yourself with the jargon, acronyms, and legalese of your profession. That is great as it will enrich your reading experience.
When writing in Plain Language the rule is to choose the shortest, simplest word that conveys your idea.
Express only one idea in each sentence.
Long, complicated sentences show that you aren't sure about what you want to say. Shorter sentences break up complex information up into small, easy-to-process units.
Don't make all your sentences follow the same pattern: this will make your writing sound choppy and unnatural. Keep variety and interest in your writing, but don't add unnecessary words.
Exercise Seven: Sentence Shortening
If you need help to shorten your sentences, look for the prepositions. Those are the little connecting words like of, to, in, by, like, about, as, at, before, on, with, etc. You can probably shorten a sentence containing more than three or four prepositions.
Certain wordy phrases are often used in the place of single simple words. If a single short word gets the message across, use it instead. Be direct.
Exercise Eight: Cut Wordy Phrases
Conversational writing is natural and direct. In revising this section, I changed "speak directly to the reader of your page" to "speak directly to your reader". It is simpler, shorter, and less abstract.
The active voice makes it clear who is responsible for an action. Passive sentences (of which this is an example) are often used to hide the person or agency responsible for an action. Clarify your writing by making the subject of the sentence do the action.
Exercise Nine: Changing Verbs from Passive to Active
Exercise Ten: Sentence Simplification
How to Use an Apostrophe - a web comic that explains the difference between its and it's.