After a very little practice it is really easier to say bonaj patroj than bona patroj.
Li ekzamenis la pomojn, kaj trovis unujn bonaj kaj aliajn malbonaj = He examined the apples, and found some good and others bad.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "bonaj" in a variety of sentences. We hope that you will now be able to make sentences using this word.