English grammar is so complex and confusing for the one very simple reason that its rules and terminology are based on Latin, a language with which it has precious little in common.
Bill BrysonBlack bears rarely attack. But here's the thing. Sometimes they do. All bears are agile, cunning and immensely strong, and they are always hungry. If they want to kill you and eat you, they can, and pretty much whenever they want. That doesn't happen often, but - and here is the absolutely salient point - once would be enough.
Bill BrysonMost big companies don't like you very much, except hotels, airlines and Microsoft, which don't like you at all.
Bill Bryson