Possibly the most confusing and complicated verb form in the English language is, paradoxically, also about the shortest: to be.
In many languages — not just in English — the different forms of the word seem to defy logic. You start with “be,” but you can’t change the tense of it by saying or writing “beed”; no, instead many forms of the word branch out: am, was, were, been, being. To most English speakers, the various permutations come naturally, but in other languages, such as Spanish, the issue seems much more difficult.