I don&#x27;t believe there are any hard and fast rules in the English language.  It&#x27;s all convention, some of which has a very high percentage of adherents, and some people in high towers claiming that one way is more correct than another.  But you will find that every &quot;rule&quot; has some form in some region that breaks it.  There&#x27;s the concept of an official grammar and vocabulary in some languages, such as French, with the Académie française, but even then people don&#x27;t follow the rules.  English has no such official committee.