By Inflections, Simple present

Hello Xavier, you're right of course: Communication is one of the tasks of language. The Grammar is "late": Language follows special patterns (word order, inflection, cases, conjugation, etc) - language has to follow those patterns as without them, communication wouldn't be possible. The only...

In former times, questions were built by a so called 'inversion', that means Subject and Verb of the actual sentence changed positions: Examples: You like tea. -----> Question: Like you tea? He likes tea. -----> Question: Likes he tea? This was possible as word order did not loom very large,...

it is the same as your other question, really - it is about the inflections we use on verb endings, we dont have many left in English, but we do still use ----s endings for the 3rd person singular from of a verb, and "it" is a 3rd person singular pronoun.